Document:

<PAGE>   1
                                                                    EXHIBIT 10.5

                              CONTRATO DE TRABALHO

Pelo presente instrumento, de um lado NETSTREAM TELECOM LTDA., EMPRESA com sede
a Avenida Juscelino Kubitschek, n(o) 1830, 9(o) torre 2, parte, Sao Paulo - SP,
CGC/MF n(o) 02.667.694/0001-40, doravante denominada EMPRESA, e de outro lado
CARLOS ANTONIO DA COSTA ANDRE, brasileiro, estado civil casado, residente a Av.
Prof. Alceu Maynard de Araujo, 443 - apt. 881, CEP 04726-160 - Sao Paulo - SP,
RG n(o) 35.849.001-7 e CPF/MF n(o) 824.152.347-53, doravante denominado
PROFISSIONAL, acordam as seguintes condicoes, integrantes do contrato de
trabalho ora firmado.

1
Objeto
O PROFISSIONAL e admitido para exercer a funcao de Diretor Presidente na
EMPRESA, sendo sua responsabilidade a coordenacao de todas as atividades
relacionadas, orgaos e empregados da EMPRESA.

2
Salario
Pelo seu trabalho, o PROFISSIONAL fara jus as seguintes verbas:

a) salario base mensal de R$ 40.000,00 (quarenta mil
reais) por mes;

b) premio em caso de atingimento de metas, diretamente relacionadas a parametros
e criterios que serao definidos anualmente pela EMPRESA, cujo valor target
correspondera a 75% da remuneracao anual. Para os efeitos deste contrato,
entende-se por valor

<PAGE>   2
target o total que sera pago caso sejam cumpridas todas as metas propostas pela
EMPRESA, e por remuneracao anual o total de 12 (doze) salarios, 13(o) salario e
remuneracao de ferias (incluindo o abono constitucional de 1/3), pagos pela
EMPRESA ao PROFISSIONAL no periodo de 12 (doze) meses compreendido entre janeiro
de dezembro.

3
Duracao do Contrato

3.1
O presente contrato entrara em vigor na data de sua assinatura, e perdurara por
prazo indeterminado, podendo ser rescindido a qualquer tempo, nos termos da lei
trabalhista em vigor.

4
Local de Trabalho
O local de trabalho sera a sede da EMPRESA, em Sao Paulo; no entanto, ocorrendo
necessidade de servico, o PROFISSIONAL aceita transferencia para outra
localidade, no pais ou no exterior.

5
Viagens
O PROFISSIONAL estara sempre a disposicao para efetuar viagens, domesticas ou
internacionais, por necessidade de servico, as quais serao reguladas por normas
da EMPRESA.

6
Sigilo

6.1
O PROFISSIONAL declara estar ciente e concorda que todas as informacoes que nao
forem de conhecimento publico

<PAGE>   3
referentes aos negocios da EMPRESA incluindo, sem se limitar, informacoes
relativas a seus produtos, relacao e consumo de clientes, precos, segredos
comerciais, patentes, metodos de negocio, informacoes de custo, "business
plans", salarios e estrategias doravante denominadas INFORMACOES CONFIDENCIAIS
sao consideradas propriedade da EMPRESA.

O PROFISSIONAL reconhece e concorda que todas as INFORMACOES CONFIDENCIAIS
produzidas pelo executivo ou as quais ele teve acesso, que nao forem de
conhecimento publico, sao propriedade unica e exclusiva da EMPRESA, e a sua
divulgacao, a quem quer que seja, causa danos a EMPRESA e e expressamente
vedada.

6.2
O PROFISSIONAL concorda em manter a obrigacao de sigilo pelo periodo de ate 10
(dez) anos contados do termino de seu contrato de trabalho. O PROFISSIONAL
devolvera todos os documentos, memorandos, desenhos, informacoes e quaisquer
papeis considerados informacoes confidenciais que estiverem em sua posse ou
controle por ocasiao da rescisao de seu contrato de trabalho, seja qual for a
razao. Nao se aplicam as obrigacoes de sigilo ora mencionadas as INFORMACOES
CONFIDENCIAIS que:

-        tornarem-se de conhecimento publico sem a participacao do PROFISSIONAL

-        cuja divulgacao tenha sido requerida por ordem judicial ou
         administrativa

-        cuja divulgacao tenha sido autorizada previamente e por escrito pela
         EMPRESA
<PAGE>   4
6.3
O PROFISSIONAL obriga-se a empregar seus melhores esforcos para impedir que
quaisquer outros empregados da EMPRESA divulguem as informacoes confidenciais,
tanto pelo periodo no qual perdurar este contrato, quanto apos o seu termino.

6.4
Fica expressamente acordado que eventual quebra do procedimento estabelecido
pela EMPRESA a respeito de sigilo sera tratada, para os fins legais, como falta
grave praticada pelo PROFISSIONAL, que indenizara ainda a EMPRESA pelos
prejuizos decorrentes.

7
Exclusividade
O PROFISSIONAL trabalhara para a EMPRESA em regime de exclusividade, nao podendo
desenvolver qualquer outra atividade PROFISSIONAL, remunerada ou nao.

8
Invencoes, Patentes e Autoria

8.1
Qualquer invento ou aperfeicoamento realizado pelo PROFISSIONAL durante a
vigencia do contrato de trabalho, decorrente tambem de recursos, dados, meios,
tempo remunerado, informacoes ou equipamentos da EMPRESA, pertencera
exclusivamente a esta.

8.2
Fica a EMPRESA autorizada a, como pessoa juridica, requerer o privilegio e obter
patente correspondente, para o que, por esta estipulacao expressa, possui, desde
ja, permissao equivalente a cessao, para os fins e efeitos legais.
<PAGE>   5
8.3
O disposto nesta clausula, especialmente quanto a cessao de direitos, aplica-se
aos casos de edicao de livros tecnicos promovida pela EMPRESA, pertencendo a
esta os dados e informacoes tecnicas desenvolvidas na vigencia do contrato.

9
Normas Disciplinares

9.1
O PROFISSIONAL se obriga a respeitar as regras disciplinares da EMPRESA,
constantes de Regulamentos, Avisos, Boletins, Circulares ou quaisquer outros
procedimentos normativos.

9.2
O PROFISSIONAL tem ciencia de que lhe e vedado, auferir ou receber de terceiros,
qualquer vantagem de ordem pessoal em virtude ou em decorrencia do exercicio de
suas funcoes, ou do proprio vinculo de emprego.

9.3
A EMPRESA podera cobrar em juizo ou descontar da remuneracao do PROFISSIONAL o
valor de eventuais danos por este causados ao patrimonio da EMPRESA.

10.
Acordo de Nao-Concorrencia
10.1
O PROFISSIONAL reconhece a aceita que a EMPRESA tem legitimo interesse em
proteger-se do fato de o PROFISSIONAL venha ser empregado em cargo de gerencia
em outra empresa que compete com a
<PAGE>   6
EMPRESA. O PROFISSIONAL e a EMPRESA, tendo considerado a melhor forma de
proteger os legitimos interesses da EMPRESA, sem que deste fato resulte
prejuizos injustificados ao PROFISSIONAL, neste ato acordam as seguintes
restricoes, sendo as mais razoaveis e justas nesta circunstancia. Durante o
Contrato de Trabalho e por um periodo de 12 (doze) meses apos a rescisao do
Contrato de Trabalho por qualquer motivo, o PROFISSIONAL compromete-se a nao,
direta ou indiretamente (seja como proprietario, socio ou empreendedor,
acionista, diretor, executivo, empregado ou consultor, ou na capacidade de
presidente ou representante de empresa ou por intermedio de qualquer pessoa,
subsidiaria ou empregado para agir como nomeado ou representante de empresa):

10.2
Associar-se com qualquer pessoa, firma, associacao, sociedade de pessoas,
sociedade ou qualquer outra EMPRESA que, diretamente possa competir com qualquer
servico ou produto que a EMPRESA ofereca a seus clientes, ou que a EMPRESA tenha
tomado providencias para comecar a oferecer, considerando que tais providencias
sejam significativas para a atividade da EMPRESA, dentro do plano de atividades
da mesma, considerando que a presente restricao nao e aplicavel se o interesse
ou associacao do PROFISSIONAL nao estiver relacionado aos negocios da EMPRESA, a
nao ser que tais servicos sejam parte significativa das atividades da EMPRESA no
plano de atividades da mesma.

10.3
Tomar providencias, direta ou indiretamente, para financiar, garantir
<PAGE>   7
ou promover qualquer assistencia material para qualquer pessoa, firma,
associacao, sociedade de pessoas, sociedade ou qualquer outra empresa que tenha
relacoes comerciais ou contrate negocios que digam respeito as atividades da
EMPRESA;

10.4
Influenciar ou tentar influenciar qualquer pessoa, firma, associacao, sociedade
de pessoas, sociedade ou outra empresa que seja parte em contratos com a EMPRESA
durante o Periodo de Restricao para rescindir qualquer contrato escrito com a
EMPRESA, ou

10.5
Admitir ou tentar admitir para ser empregado qualquer pessoa que esteja
empregado pela EMPRESA na epoca, ou que o contrato de trabalho com a EMPRESA
tenha terminado ha menos de 06 (seis) meses antes desse periodo, ou tentar
influenciar qualquer pessoa a rescindir seu contrato de trabalho com a EMPRESA.

10.6
As provisoes restritivas deste contrato nao proibem o PROFISSIONAL de ter
investimento em acoes de qualquer sociedade que tenha relacoes comerciais com a
EMPRESA, sendo tais acoes listadas ou negociadas em mercado de balcao,
considerando que tal posicao nao exceda 2% do valor da sociedade ou de seu poder
de voto e que nao garanta ao investidor controle de tal sociedade. Para fins do
presente contrato, o termo "EMPRESA" deve incluir a EMPRESA e todas as suas
EMPRESAs filiadas.

10.7 As provisoes restritivas deste contrato estao limitadas ao territorio da
America Latina.
<PAGE>   8
10.8 A EMPRESA se compromete a pagar ao PROFISSIONAL durante o periodo em que
estiver obrigado a cumprir a clausula de nao competicao e nao-solicitacao uma
quantia em reais correspondente a um ano de remuneracao (de acordo con clausula
2b), desde que o PROFISSIONAL tenha sido dispensado sem justa causa.

11
Quebra de Disposicoes Contratuais

11.1
O PROFISSIONAL reconhece que a violacao, por sua parte, de qualquer acordo
previsto neste contrato, podera causar danos incomensuraveis e irreparaveis para
a EMPRESA. O PROFISSIONAL declara que sua condicao financeira e tal que as
previsoes contratuais, incluindo nao-competicao, nao-solicitacao de empregados,
sigilo e clausulas de invencoes, patentes e direitos autorais, nao ira impedir o
seu sustento e de sua familia de maneira satisfatoria a si e a sua familia.
Desta forma, o PROFISSIONAL concorda que a EMPRESA tera direito de acao perante
qualquer Juizo competente diante de qualquer violacao ou ameaca de violacao de
qualquer das disposicoes, alem de qualquer outra medida garantidas a EMPRESA. O
descumprimento de qualquer das disposicoes deste contrato por parte do
PROFISSIONAL, desobriga a EMPRESA de qualquer obrigacao de pagar ao PROFISSIONAL
qualquer verba em decorrencia deste contrato ou de qualquer plano de incentivo
ou "stock option" oferecido pela EMPRESA, e gera o direito da EMPRESA de ser
reembolsada pelo PROFISSIONAL, por meio de acao competente, de todos os valores
previamente pagos a este titulo
<PAGE>   9
ao PROFISSIONAL nos 06 (seis) meses precedentes a tal rescisao contratual, no
que diz respeito a "stock options".

Sao Paulo, 15 de marco de 2000.

 /s/ John a. Haigh
 ---------------------------
 JOHN A. HAIGH
 PRESIDENT
 INTERNATIONAL VENTURES ORGANIZATION

 /s/ Marie Santana 3/16/00
 ---------------------------
 MARIE SANTANA
 HUMAN RESOURCES VICE PRESIDENT
 INTERNATIONAL OPERATIONS

 /s/ Carlos Antonio da Costa Andre
 ---------------------------------
 CARLOS ANTONIO da COSTA ANDRE
<PAGE>   10
                               ACORDO COMPLEMENTAR

Pelo presente instrumento, de um lado NETSTREAM TELECOM LTDA., empresa com sede
a Avenida Juscelino Kubitschek, n(o) 1830, 9(o) torre 2, parte, Sao Paulo - SP,
CGC/MF n(o) 02.667.694/0001-40, doravante denominada EMPRESA, e de outro lado
CARLOS ANTONIO da COSTA ANDRE, brasileiro, estado civil casado, residente a Av.
Prof. Alceu Maynard de Araujo, 443 - apt. 881, CEP 04726-160 - Sao Paulo - SP,
RG n(o) 35.849.001-7 e CPF/MF n(o) 824.152.347-53, doravante denominado
PROFISSIONAL, acordam as seguintes condicoes complementares ao contrato de
trabalho firmado.

1.
Gratificacao
A NETSTREAM pagara ao PROFISSIONAL uma gratificacao pelo seu ingresso na
empresa, em parcela unica, equivalente em Reais a US$ 50,000 (cinquenta mil
dolares norte-americanos), ate dois meses apos a assinatura deste instrumento.

A gratificacao pressupoe a permanencia na Netstream por pelo menos 18 meses. O
nao cumprimento deste prazo implica a devolucao do valor de gratificacao
proporcional ao periodo nao cumprido.

2.
Balanco salarial
A NETSTREAM fara um balanco salarial por ocasiao de cada pagamento de premiacao
ao PROFISSIONAL contemplando os acertos mensais referentes a diferenca entre o
salario

<PAGE>   11
pago em reais e o correspondente salario, em reais, indexado em dolares, devendo
ser considerado, para este calculo, a taxa PTAX emitida pelo Banco Central
referente ao ultimo dia util de cada mes. O montante total oriundo deste balanco
deve ser creditado adicionalmente ao valor de premiacao, de acordo com a
seguinte formula:

A= salario mensal inicial em dolares, equivalente a US$ 22,557 dolares
americanos

B= taxa de conversao de dolares para reais vigente no ultimo dia util de cada
mes, considerando, para tanto, a taxa PTAX emitida pelo Banco Central

C= valor devido, em reais

D= valor efetivamente pago, em reais

E= diferenca mensal para computo no balanco salarial

(A) x (B) = (C)
(C) - (D) = (E)

2.1
O Balanco Salarial sera considerado adiantamento do dissidio anual estabelecido
em Acordo Coletivo.

3.
Automovel
A NETSTREAM disponibilizara para uso do PROFISSIONAL automovel no valor maximo
de R$ 85.000,00 (oitenta e cinco mil reais). Aplicam-se todas as regras
referentes a politica de veiculos da Netstream, que encontra-se no anexo I.

4.
"Stock Options"

4.1
Na medida em que seja viavel, em data

<PAGE>   12
apos o Fechamento da fusao entre AT&T Latin America e Firstcom, a NETSTREAM fara
com que AT&T Latin America conceda ao PROFISSIONAL 200.000 opcoes de acoes
ordinarias da AT&T Latin America ("Opcoes"). O direito ao exercicio das opcoes
sera adquirido, no que diz respeito a 25% (vinte e cinco por cento) dessas acoes
no primeiro aniversario contados da inicio do contrato de trabalho, 25% no
segundo aniversario, 25% no terceiro aniversario, e os 25% restantes no quarto
aniversario. As opcoes serao concedidas de acordo com o plano de incentivo
"Stock Options" a ser implantado pela AT&T Latin America Corp. e devem estar
adstritas aos termos e condicoes desse plano e tambem ao Acordo de "Stock
Option" se sera feito entre o PROFISSIONAL e a NETSTREAM.

Sao Paulo, 15 de marco de 2000.

 /s/ John A. Haigh
 ---------------------------
 JOHN A. HAIGH
 PRESIDENT
 INTERNATIONAL VENTURES ORGANIZATION

 /s/ Marie Santana
 ---------------------------
 MARIE SANTANA
 HUMAN RESOURCES VICE PRESIDENT
 INTERNATIONAL OPERATIONS

 /s/ Carlos Antonio da Costa Andre
 ---------------------------------
 CARLOS ANTONIO da COSTA ANDRE
<PAGE>   13
                   ENGLISH TRANSLATION OF EMPLOYMENT CONTRACT

Through this instrument, NETSTREAM TELECOM LTDA., a COMPANY based out of Avenida
Juscelino Kubitschek N(Degree) 1830, 9th floor, Tower 2, part, Sao Paulo - SP,
CGC/MF N(Degree) 02.667.694/0001-40, hereinafter called the COMPANY, and CARLOS
ANTONIO DA COSTA ANDRE, brazilian, married, resident at Av. Prof. Alceu Maynard
de Araujo, 443 - apt. 881, CEP 04726-160 - Sao Paulo - SP, ID No. 35.849.001-7
and CPF/MF N(Degree) 824.152.347-53, hereinafter called the EXECUTIVE, agree on
the following conditions that form an integral part of the Employment Contract
signed hereby.

1
Purpose
The EXECUTIVE is employed in the position of Managing Director / CEO of the
COMPANY, being responsible for the coordination all activities related thereto,
as well as the departments and employees of the COMPANY.

2
Salary
For his work, the EXECUTIVE will be paid the following amounts:

a) basic monthly wage of R$ 40.000,00 (forty thousand
Reais) per month;

b) bonus for reaching the targets related directly to the parameters and
criteria to be defined by the COMPANY on an annual basis, and whose target value
will correspond to 75% of the annual remuneration. For the purposes of this
contract, the target value is taken to
<PAGE>   14
mean the total amount to be paid should all targets set by the COMPANY be met;
annual remuneration is taken to mean the total of 12 (twelve) monthly wages,
13th wage and vacation pay (including the one-third vacation bonus due under the
Brazilian Constitution), paid by the COMPANY to the EXECUTIVE during the period
of 12 (twelve) months between January and December.

3
Duration of the Contract
3.1
This Contract will enter into effect on the date of signature thereof, and will
remain effective for an unspecified period; it may be rescinded at any time, in
compliance with Brazilian Labor Law.

4
Work Place
The work place will be the head offices of the COMPANY in Sao Paulo; however,
should business purposes so require, the EXECUTIVE hereby accepts a transfer to
another location, in Brazil or abroad.

5
Travel
The EXECUTIVE will always be available for domestic or international travel when
required for business purposes, with such trips governed by COMPANY rules.

6
Non-Disclosure

6.1
The EXECUTIVE hereby declares that he is cognizant and in agreement that all
information that is not public knowledge
<PAGE>   15
with regard to the businesses of the COMPANY including but not limited to
information on its products, customer relationships and consumption, prices,
commercial secrets, patents, business methods, cost data, business plans, wages
and strategies, hereinafter called CONFIDENTIAL INFORMATION, is considered the
property of the COMPANY.

The EXECUTIVE acknowledges and agrees that all CONFIDENTIAL INFORMATION produced
by the executive or to which he has access and which is not public knowledge is
the sole and exclusive property of the COMPANY, and that the disclosure thereof
to any person whatsoever causing losses and damages to COMPANY is expressly
prohibited.

6.2
The EXECUTIVE agrees to maintain this obligation of non-disclosure in effect for
a period of up to 10 (ten) years after the termination of his employment
contract. The EXECUTIVE will return all documents, memoranda, designs, drawings,
information and any papers deemed to contain confidential information that he
may have in his possession or control on the termination of his employment
contract, regardless of the reason for such termination. The non-disclosure
obligations stipulated here are not applicable to CONFIDENTIAL INFORMATION:

-        That becomes public knowledge without the
         involvement of the EXECUTIVE

-        that is disclosed under an administrative or court order

-        whose disclosure has been authorized in advance in writing by the
         COMPANY
<PAGE>   16
6.3
The EXECUTIVE agrees to do his utmost to prevent any other employees of the
COMPANY from disclosing confidential information during the validity of this
contract as well as after the termination thereof.

6.4
It is expressly agreed that any possible future breach of procedure as
established by the COMPANY in terms of non-disclosure will be dealt with for
legal purposes as a serious fault by the EXECUTIVE, who will compensate the
COMPANY for losses and damages caused thereby.

7
Exclusivity
The EXECUTIVE will work for the COMPANY on an exclusive basis, and may not
undertake any other professional activities whatsoever, whether remunerated or
not.

8
Inventions, Patents and Author's Rights
8.1
Any invention or improvement by the EXECUTIVE during this employment contract
that is also based on the resources, data, facilities, remunerated working
hours, information or equipment of the COMPANY, will belong solely thereto.

8.2
The COMPANY is hereby authorized as a corporation to apply for registration and
obtain the corresponding patent, for which purpose it is hereby expressly
stipulated and granted permission equivalent to the transfer and award thereof
for all legal purposes and
<PAGE>   17
effects.

8.3
The provisions of this Clause, particularly with regard to the transfer of
rights, are applicable to the publishing of technical books undertaken by the
COMPANY, with all technical information and data developed during the Employment
contract belonging thereto.

9
Regulations
9.1
The EXECUTIVE agrees to comply with the disciplinary rules of the COMPANY,
issued through the Regulations, Announcements, Bulletins, Circulars or any other
regulatory procedures.

9.2
The EXECUTIVE is aware that he may not offer or obtain from third parties any
advantage of a personal nature by means or as a result of the exercise of his
functions, or the employment link as such.

9.3
The COMPANY may sue through the Courts or deduct from the remuneration of the
EXECUTIVE the amount of any possible future losses or damages caused thereby to
the equity and assets of the COMPANY.

10.
Covenant Not to Compete.
10.1
The EXECUTIVE acknowledges and agrees that the COMPANY has a legitimate interest
in being protected from the EXECUTIVE's being employed in a position of
management by an entity that competes with the COMPANY. The EXECUTIVE and the
COMPANY have
<PAGE>   18
considered carefully how best to protect the legitimate interests of the COMPANY
without unreasonably restricting the economic interests of the EXECUTIVE, and
hereby agree to the following restrictions, as the most reasonable and equitable
under the circumstances. During the Employment Period and for a period of twelve
(12) months after the EXECUTIVE's termination of employment with the COMPANY for
any reason, the EXECUTIVE will not, directly or indirectly (whether as sole
proprietor, partner or venturer, stockholder, director, officer, employee or
consultant or in any other capacity as principal or agent or through any person,
subsidiary or employee acting as nominee or agent):

10.2
Conduct or engage in or be interested in or associated with any person, firm,
association, partnership, corporation or other entity that, directly competes
with any service or product that the COMPANY actually provides to its customers,
or that the COMPANY has taken substantial steps to commence providing that is a
significant part of the COMPANY's business or intended to be a significant part
of the COMPANY's business in the COMPANY's business plan, provided that the
foregoing shall not apply if the EXECUTIVE's interest or association with such
competitor is unrelated to the COMPANY's business; or intended to be a
significant part of the COMPANY's business in the COMPANY's business plan.

10.3

Take any action, directly or indirectly, to finance, guarantee or provide any
other material assistance to any person, firm
<PAGE>   19
association, partnership, corporation or other entity which conducts or engages
in the business with respect to any activity that competes with the COMPANY's
Business;

10.4

Influence or attempt to influence any person, firm, association, partnership,
corporation or other entity who is a contracting party with the COMPANY at any
time during the Restriction Period to terminate any written agreement with the
COMPANY, or

10.5

Hire or attempt to hire for employment any person who is employed by the COMPANY
at the time of hiring or attempted hiring or whose active employment with the
COMPANY ceased less than six months prior to such time, or attempt to influence
any such person to terminate employment with the COMPANY.

10.6
The restrictive provisions of this Agreement shall not prohibit the EXECUTIVE
from having as an investment an equity interest in the securities of any
corporation engaged in the COMPANY's business, which securities are listed on a
recognized securities exchange or traded in the over-the-counter market to the
extent that such interest does not exceed 2% of the value or voting power of
such corporation and does not constitute control of such corporation. For
purposes of this Agreement, the term "COMPANY" shall include the COMPANY and
each of its affiliates.

10.7 The effect of any restrictive provision of this agreement is limited to the
territory of Latin America.
<PAGE>   20
10.8 The COMPANY undertakes to pay the EXECUTIVE an amount in REAIS equivalent
to an annual remuneration (as defined in clause 2b) for the term in which said
PROFESSIONAL shall comply with the non-competition and non-soliciting clause,
considering the PROFESSIONAL was terminated for no cause.

11
Breach of Certain Provisions.
11.1
The EXECUTIVE acknowledges that a violation on the EXECUTIVE's part of any of
the covenants contained this Agreement would cause immeasurable and irreparable
damage to the COMPANY. The EXECUTIVE represents that his economic means and
circumstances are such that the provisions of this Agreement, including the
non-competition, non-solicitation of employees, non-disclosure and COMPANY
property provisions, will not prevent him from providing for himself and his
family on a basis satisfactory to him and them. Accordingly, the EXECUTIVE
agrees that the COMPANY shall be entitled to injunctive relief in any court of
competent jurisdiction for any actual or threatened violation of any such
covenant in addition to any other remedies it may have. Any breach by the
EXECUTIVE of the provisions of this Agreement shall relieve the COMPANY of all
obligations to any further payments to the EXECUTIVE pursuant to this Agreement
or otherwise under any incentive or stock option made by the COMPANY and, shall
entitle the COMPANY to repayment from the EXECUTIVE, upon demand, of all amounts
previously paid to the EXECUTIVE following or in the six months preceding such
breach with
<PAGE>   21
respect to previously granted "stock options".

Sao Paulo, March 15, 2000.

 /s/ John A. Haigh
 ---------------------------
 JOHN A. HAIGH
 PRESIDENT
 INTERNATIONAL VENTURES ORGANIZATION

  /s/ Marie Santana
  ---------------------------
  MARIE SANTANA
  HUMAN RESOURCES VICE PRESIDENT
  INTERNATIONAL OPERATIONS

  /s/ Carlos Antonio da Costa Andre
  ---------------------------------
  CARLOS ANTONIO DA COSTA ANDRE
<PAGE>   22
                             SUPPLEMENTARY AGREEMENT

Through this instrument, NETSTREAM TELECOM LTDA., a Company with it's main
offices at Avenida Juscelino Kubitschek N(Degree) 1830, 9th floor, Tower 2,
part, Sao Paulo - SP, CGC/MF N(Degree) 02.667.694/0001-40, hereinafter called
the COMPANY, and CARLOS ANTONIO DA COSTA ANDRE, brazilian, married, resident at
Av. Prof. Alceu Maynard de Araujo, 443 - apt. 881, CEP 04726-160 - Sao Paulo -
SP, ID No. 35.849.001-7 and CPF/MF N(Degree) 824.152.347-53, hereinafter called
the EXECUTIVE, agree on the following supplementary conditions to the signed
employment contract.

1.
Sign-On Bonus
NETSTREAM will pay the EXECUTIVE a sign-on bonus upon joining the Company, as a
single payment equivalent in Reais to US$ 50,000 (fifty thousand US Dollars),
within up to two months after the signature of this instrument.

This sign-on bonus is conditional remaining with Netstream for at least 18
(eighteen) months. Any failure to complete this period will result in the
reimbursement of the sign-on bonus in an amount proportional to the period of
time not completed.

2.
Wage Balance Sheet
NETSTREAM will draw up a Wage Balance Sheet for each payment made to the
EXECUTIVE, covering the monthly adjustments for the difference between the wage
paid in Reais and the
<PAGE>   23
corresponding dollar-indexed wage in Reais. This calculation should be based on
the PTAX rate issued by the Brazilian Central Bank (Banco Central) for the last
business day of each month. The total amount deriving from this Wage Balance
Sheet should be credited, in addition to the cash bonus, according to the
following formula:

A= initial monthly wage is US Dollars, equivalent to US$ 22,557

B= US$ / R$ conversion rate in effect on the last business day of the each
month, based on the PTAX rate issued by the Brazilian Central Bank (Banco
Central)

C= amount due, in Reais

D= amount actually paid, in Reais

E= outstanding monthly difference according to the calculation in the Wage
Balance Sheet

(A) x (B) = (C)
(C) - (D) = (E)

2.1
The Wage Balance Sheet will be considered as payment in advance of the annual
salary adjustment rate, provided in any Labor Union Collective Agreement.

3.
Company Car
NETSTREAM will make available for the use of the EXECUTIVE a car with a value of
no more than R$ 85.000,00 (eighty-five thousand Reais). All the rules in the
Netstream Vehicles Policy are applicable thereto, given in Annex I.

4.
Stock Options
4.1
As promptly as reasonably practical
<PAGE>   24
following the Closing Date of the merger between AT&T Latin America and
Firstcom, NETSTREAM shall cause AT&T Latin America to grant the EXECUTIVE
200,000 options of AT&T Latin America common stock (the "Options"). The Options
shall vest and become exercisable with respect to twenty-five percent (25%) of
the shares subject to the Options upon the first anniversary of the grant date,
twenty-five percent (25%) upon the on the second anniversary of the grant date,
twenty-five percent (25%) upon the third anniversary of the grant date, and the
final twenty-five percent (25%) on the fourth anniversary of the grant date. The
Options shall be granted pursuant to a stock incentive plan to be adopted by
AT&T Latin America Corp. and shall be subject the terms and conditions of the
plan and the related stock option agreement to be entered into between the
EXECUTIVE and NETSTREAM.

Sao Paulo, March 15, 2000.

 /s/ John A. Haigh
 ---------------------------
 JOHN A. HAIGH
 PRESIDENT
 INTERNATIONAL VENTURES ORGANIZATION

 /s/ Marie Santana
 ---------------------------
 MARIE SANTANA
 HUMAN RESOURCES VICE PRESIDENT
 INTERNATIONAL OPERATIONS

 /s/ Carlos Antonio da Costa Andre
 ---------------------------------
 CARLOS ANTONIO da COSTA ANDRE<PAGE>   1
                                                                    EXHIBIT 10.6

                              EMPLOYMENT AGREEMENT

          EMPLOYMENT AGREEMENT, by and between FirstCom Corporation, a Texas
corporation (the "COMPANY"), and Thomas C. Canfield (the "EXECUTIVE"), dated as
of the 9th day of May, 2000.

          WHEREAS, the Company desires the Executive serve as its General
Counsel, and the Executive desires to so serve, in each case upon the terms and
conditions set forth herein.

          NOW THEREFORE, in consideration of the mutual covenants herein
contained, the Company and the Executive hereby agree as follows:

          1.   EMPLOYMENT PERIOD.

          (a)  AGREEMENT TO EMPLOY. The Company hereby agrees to employ the
Executive, and the Executive hereby agrees to be employed by the Company,
pursuant to the terms and conditions set forth in this Agreement. The Executive
represents that (I) he is entering into this Agreement voluntarily and that his
employment hereunder and compliance with the terms and conditions hereof will
not conflict with or result in the breach by him of any agreement to which he is
a party or by which he may be bound, (II) he has not, and in connection with his
employment with the Company will not, violated any non-solicitation or other
similar covenant or agreement by which he is or may be bound and (III) in
connection with his employment with the Company he will not use any confidential
or proprietary information he may have obtained in connection with employment
with any prior employer.

          (b)  TERM OF EMPLOYMENT. Unless the Executive's employment shall
sooner terminate pursuant to Section 4, the Company shall employ the Executive
for a term commencing on May 9, 2000 (the "COMMENCEMENT DATE") and ending on the
second anniversary thereof (the "INITIAL TERM"). Effective upon the expiration
of the Initial Term and of each Additional Term (as defined below), the
Executive's employment hereunder shall be deemed to be automatically extended,
upon the same terms and conditions, for an additional period of one year (each,
an "ADDITIONAL TERM"), in each such case, commencing upon the expiration of the
Initial Term or the then current Additional Term, as the case may be, unless, at
least 90 days prior to the expiration of the Initial Term or such Additional
Term, either the Company or the Executive shall give written notice to the other
of its intention not to extend the Employment Period (as defined below). The
period during which the Executive is employed pursuant to this Agreement shall
be referred to as the "EMPLOYMENT PERIOD".

          2.   POSITION AND DUTIES.

          (a)  During the Employment Period, the Executive shall be employed as
General Counsel of the Company and shall have overall responsibility for all
legal matters affecting the Company or its subsidiaries and shall have such
duties and responsibilities as are customarily assigned to individuals serving

<PAGE>   2

in such positions and such other duties consistent with Executive's titles and
positions as the Board of Directors of the Company (the "BOARD") or the
Company's Chief Executive Officer specifies from time to time including, but not
limited to, supervising all attorneys employed by the company or any of its
subsidiaries, and selecting and overseeing any outside counsel retained by the
Company or any of its subsidiaries. The Executive shall also be given a
reasonable opportunity to review any press releases and regulatory filings to be
issued or filed by the Company. The Executive, in carrying out his duties under
this Agreement, shall report and be subject to the Chief Executive Officer and
the Board of Directors. During the Employment Period, and excluding any periods
of vacation, holiday, personal leave and sick leave to which the Executive is
entitled, the Executive shall devote the Executive's full business time,
attention and ability to the business and affairs of the Company and shall use
the Executive's reasonable best efforts to carry out the Executive's
responsibilities faithfully and efficiently in a professional manner. It shall
not be considered a violation of the foregoing for the Executive to (I) serve on
corporate or civic boards reasonably approved by the Company or on charitable
boards or committees, (II) deliver lectures or fulfill speaking engagements and
(III) manage his or his family's personal investments, in each case so long as
such activities do not substantially interfere with the performance of the
Executive's responsibilities as an employee of the Company in accordance with
this Agreement, do not violate the Company's rules and policies (or present a
material conflict of interest with the Company) and do not otherwise constitute
a violation of Section 6 of this Agreement. The Executive shall comply with the
rules and policies of the Company that are generally applicable to the Company's
senior executives.

          (b)  The Executive's primary office shall be located in the
metropolitan Miami, Florida area (it being understood that Executive's position
will require substantial travel).

          3.   COMPENSATION.

          (a)  BASE SALARY. During the Employment Period, the Executive shall
receive an annual base salary of $250,000.00 payable pursuant to the Company's
normal payroll practices, but no less frequently than monthly ("ANNUAL BASE
SALARY"). Commencing in 2001, the Annual Base Salary then in effect shall be
reviewed by the Company by no later than April 15th of each year and may be
increased (but not decreased) by such amount as the Company in its sole
discretion shall determine.

          (b)  ANNUAL BONUS. The Executive shall be entitled to participate in
an annual bonus plan for its executive officers that is intended to comply with
the performance-based exemption provisions of Section 162(m) of the Internal
Revenue Code of 1986, as amended (the "CODE"). Executive's target annual bonus
will be 50% of his Annual Base Salary as in effect for such year. Executive's
actual annual bonus will be determined based on specified target performance
goals with respect to which such target and maximum bonus, etc., will be
determined as established by the Compensation Committee of the Board or by the
Chief Executive Officer.

          (c)  STOCK OPTION GRANT. Effective as of the Commencement Date, the
Company shall grant the Executive options (the "Options") to purchase 200,000
shares of the Company's common stock, par value $0.001 per share pursuant to an

                                       2
<PAGE>   3

option agreement substantially in the form attached as Exhibit A. The Options
shall qualify as "incentive stock options" under Section 422 of the Code to the
maximum extent permissible under the Code and the balance of the Options shall
be non-qualified stock options. The Options shall vest and become exercisable
with respect to one half (50%) of the shares subject to the Options on the
second anniversary of the Commencement Date, twenty-five percent (25%) upon the
third anniversary of the Commencement Date, and the final twenty-five percent
(25%) on the fourth anniversary of the Commencement Date. The Options shall have
an exercise price per share equal to the fair market value of a share of the
Company's common stock on the date of grant. The Options shall be subject to
such other restrictions as determined by the Company and as set forth in the
related stock option agreement to be entered into between the Executive and the
Company. As provided in the Merger Agreement referred to in Section 14(d), the
Options will, upon consummation of the transactions contemplated in the Merger
Agreement, be exchanged for equivalent options of AT&T Latin America Corp.. Any
applicable stock option agreement underlying the Options will be in the
substantially same form provided to other peer employees of the Company.

          (d)  BENEFIT PLANS AND PERQUISITES. The Executive shall be entitled to
participate in all benefit, pension, savings, welfare, perquisite and other
plans or arrangements that the Company may establish from time to time for its
senior executive officers, subject to the terms and conditions of such plans or
arrangements.

          (e)  CAR ALLOWANCE. The Executive shall be entitled to a car allowance
of $400 per month during the Employment Period.

          (f)  SIGNING BONUS. As promptly as reasonably practicable following
the Commencement Date, the Executive shall be paid a signing bonus of $55,000.

          (g)  EXPENSES. (A) The Company will reimburse Executive for all
reasonable expenses for temporary living arrangements incurred by Executive in
relocating to South Florida within the first sixty (60) days of this Agreement.
Receipts for any such expenses must be submitted to the Company. In no event
shall such reimbursement exceed an aggregate of $5,000.00. (B) During the
Employment Period, the Executive shall be entitled to receive reimbursement for
all reasonable business expenses incurred by the Executive in carrying out the
Executive's duties under this Agreement in accordance with the policies of the
Company, provided that the Executive complies with the policies, practices and
procedures of the Company for submission of expense reports, receipts, or
similar documentation of such expenses.

          (h)  VACATION. During the Employment Period, the Executive shall be
entitled to paid vacation of four (4) weeks per year.

          4.   TERMINATION OF EMPLOYMENT.

          (a)  DEATH OR DISABILITY. The Executive's employment shall terminate
automatically upon the Executive's death or upon a determination by the Board to
terminate the Executive's employment as a result of his Disability during the
Employment Period. For purposes of this Agreement, "DISABILITY" shall mean a
physical or mental disability that prevents or is reasonably expected to

                                       3
<PAGE>   4

prevent, with or without a reasonable accommodation, the performance by the
Executive of his duties hereunder for a continuous period of 90 days or longer
or for 180 days or more in any 12-month period. The determination of Executive's
Disability shall (i) be made by an independent physician who is reasonably
acceptable to the Company and Executive (or his representative), (II) be final
and binding on the parties hereto and (III) be made taking into account such
competent medical evidence as shall be presented to such independent physician
by Executive and/or the Company or by any physician or group of physicians or
other competent medical experts employed by Executive and/or the Company to
advise such independent physician. This paragraph shall be applied in conformity
with the Americans with Disabilities Act and other applicable laws.

          (b)  BY THE COMPANY. The Company may terminate the Executive's
employment during the Employment Period for Cause or without Cause. For purposes
of this Agreement, "CAUSE" shall mean the Executive's (I) engaging in fraudulent
or dishonest conduct (as determined by a finding, order, judgement or decree in
any court or administrative agency of competent jurisdiction, in any action or
proceeding, whether civil, criminal, administrative or investigative) that the
Board reasonably determines has or would have a material adverse impact on the
Company, its affiliates or their respective businesses; (II) conviction of, or
entering a plea of nolo contendere to, a felony criminal offense or comparable
crime in any jurisdiction that uses a different nomenclature; (III) willful
refusal to perform his material employment-related duties or responsibilities or
intentionally and knowingly engaging in any activity that is in material
conflict with or is materially adverse to the business interests of the Company,
its affiliates or their respective businesses; (IV) gross negligence in the
performance of his material employment-related duties or responsibilities; or
(V) breach of any material provision of the employment agreement (in the case of
(iii), (iv) and (v), that is not cured by the Executive within 30 days of
receipt of prior written notice from the Company setting forth in reasonable
detail the circumstances giving rise to such Cause). A termination for Cause
shall include a determination by the Board no later than six months following
the termination of the Employment Period that circumstances existed during the
Employment Period that would have justified a termination by the Company for
Cause. A termination of the Executive by the Company shall not be a termination
for Cause for purposes of this Agreement unless the determination to so
terminate the Executive's employment is made by a resolution adopted by the
Board (excluding the Executive) following a meeting convened upon no less than
10 days prior written notice to the Executive and at which the Executive and his
legal counsel shall have had the reasonable opportunity to be heard by the
Board.

          (c)  BY THE EXECUTIVE. The Executive may terminate employment with or
without Good Reason. For purposes of this Agreement, "GOOD REASON" means,
without the Executive's written consent: (I) a material diminution of the
Executive's duties or responsibilities or the assignment of responsibilities
that are materially inconsistent with his position and responsibilities
hereunder; (II) a reduction in the Executive's base salary, annual bonus or
long-term incentive compensation opportunity (it being understood that a

                                       4
<PAGE>   5

reduction in the dollar amount of Executive's annual bonus from year to year
solely as the result of achievement or failure to achieve the target performance
objectives provided in the annual bonus plan shall not constitute a reduction in
Executive's annual bonus opportunity) or the benefits to be made available
pursuant to Section 3(d); (III) requiring Executive's principal place of
business to be located other than as provided in Section 2(b); or (iV) a
material breach by of any other provision of the Agreement, in each case that is
not cured by the Company within 30 days of receipt of prior written notice from
the Executive setting forth in reasonable detail the circumstances giving rise
to such Good Reason. Notwithstanding anything in this Agreement to the contrary,
Good Reason shall not include the termination or discharge of the Executive by
the Company from any duties, responsibilities, title or employment as Secretary
of the Company.

          (d)  TERMINATION PROCEDURES. Any termination of the Executive's
employment by the Company or by the Executive shall be communicated by Notice of
Termination to the other party hereto given in accordance with this Agreement.
For purposes of this Agreement, a "NOTICE OF TERMINATION" means a written notice
which (I) indicates the specific termination provision in this Agreement relied
upon, (II) to the extent applicable, sets forth in reasonable detail the facts
and circumstances claimed to provide a basis for termination of the Executive's
employment under the provision so indicated and (III) if the Date of Termination
(as defined below) is other than the date of receipt of such notice, specifies
the termination date. For purposes of this Agreement, "DATE OF TERMINATION"
means (I) if the Executive's employment is terminated by the Company or by the
Executive (other than for death or Disability), 90 days following the date of
receipt of the Notice of Termination and (II) if the Executive's employment is
terminated by reason of death or Disability, the Date of Termination shall be
the date of death of the Executive or, in the case of Disability, the date of
the determination of the Executive's Disability, provided that the Company may
pay the Executive (at the rate of his Annual Base Salary as then in effect) in
lieu of part or all of such notice period.

          (e)  EFFECT OF TERMINATION. Effective as of any Date of Termination,
or, if earlier, as of any date specified by the Company at or following the
delivery of a Notice of Termination, the Executive shall resign, in writing,
from all Board memberships and other positions then held by him with the Company
and its Affiliates.

          5.   OBLIGATIONS OF THE COMPANY UPON TERMINATION.

          (a)  GENERAL. If, during the Employment Period, the Executive's
employment terminates for any reason, the Executive (or his estate, beneficiary
or legal representative) shall be entitled to receive (I) any earned or accrued
but unpaid Annual Base Salary through the Date of Termination (including with
respect to unused vacation time), (II) in the case of any termination of
employment other than for Cause, any earned but unpaid annual bonus with respect
to any fiscal year of the Company ending prior to the Date of Termination and
(III) all amounts payable and benefits accrued under any otherwise applicable
plan, policy, program or practice of the Company (other than relating to
severance) in which Executive was a participant during his employment with
Company in accordance with the terms thereof (including, but not limited to,
amounts deferred under the deferred compensation plan referred to in Section
4(d)).

                                       5
<PAGE>   6

          (b)  OTHER THAN FOR CAUSE, DEATH OR DISABILITY; GOOD REASON. If,
during the Employment Period, the Company terminates the Executive's employment,
other than for Cause, death or Disability, or the Executive terminates
employment for Good Reason, the Company shall, subject to Section 12, in
addition to the amounts provided in paragraph (a) above, pay to the Executive
(or his estate, beneficiary or legal representative):

          (i) in twelve (12) equal monthly installments commencing on the first
     day of the month following the Date of Termination, the sum of: (A) the
     Executive's Annual Base Salary (as then in effect), or the Executive's
     Annual Base Salary that would otherwise have been payable for the remainder
     of the Initial Term, whichever is greater; and (B) the greater of the
     Executive's target bonus for the year in which the Date of Termination
     occurs or the average of the Executive's actual annual bonus paid with
     respect to the two years preceding the year in the which Date of
     Termination occurs, such sum then divided by twelve (12); and

          (ii) at the time annual bonuses for the fiscal year in which the Date
     of Termination occurs are paid, a pro rata annual bonus based upon actual
     performance under the annual bonus plan for such fiscal year (as determined
     by the Board or the Compensation Committee in its reasonable discretion),
     to the extent not otherwise paid.

In addition, (i) if the Executive's employment terminates under this section
prior to the second anniversary of the Commencement Date, notwithstanding
anything in Section 3(c) to the contrary, the Options shall vest and become
exercisable with respect to one-half (50%) of the shares subject to the Options
and (ii) the Executive and the Executive's eligible spouse, dependents and
beneficiaries will continue to be eligible to participate in the Company's
medical, dental, disability, life and other welfare insurance plans (subject to
the Executive continuing to make any required contributions to such plans) for a
period of twelve (12) months following the Date of Termination (or the Company
shall provide equivalent benefits for such period); provided that such continued
benefits shall cease upon the Executive becoming eligible for comparable
benefits from a subsequent employer.

          6.   COVENANT NOT TO COMPETE. The Executive acknowledges and agrees
that the Company has a legitimate interest in being protected from the
Executive's being employed in a position of management by an entity that
competes with the Company. The Executive and the Company have considered
carefully how best to protect the legitimate interests of the Company without
unreasonably restricting the economic interests of the Executive, and hereby
agree to the following restrictions, in addition to those contained in Section
7, as the most reasonable and equitable under the circumstances. During the
Employment Period and for a period of twenty-four (24) months after the
Executive's termination of employment with the Company for any reason, including
expiration of the Employment Period (the "RESTRICTION PERIOD"), the Executive
will not, directly or indirectly (whether as sole proprietor, partner or
venturer, stockholder, director, officer, employee or consultant or in any other
capacity as principal or agent or through any person, subsidiary or employee
acting as nominee or agent):

                                       6
<PAGE>   7

          (a)  Conduct or engage in or be interested in or associated with any
person, firm, association, partnership, corporation or other entity that, within
the "Territory" (as defined in the Regional Vehicle Agreement referred to in the
Merger Agreement), directly competes with any service or product that the
Company actually provides to its customers, or that the Company has taken
substantial steps to commence providing that is a significant part of the
Company's business or intended to be a significant part of the Company's
business in the Company's business plan, in each case determined as of the Date
of Termination (the "BUSINESS"), PROVIDED that the foregoing shall not apply if
the Executive's interest or association with such competitor is unrelated to the
Business; provided, further, that the foregoing the "Business" shall not be
deemed to include cable television services or programming, broadcast
television, internet access or content or consumer wireless communications or
services unless such products or services are a significant part of the
Company's business or intended to be a significant part of the Company's
business in the Company's business plan, in each case determined as of the Date
of Termination.

          (b)  Take any action, directly or indirectly, to finance, guarantee or
provide any other material assistance to any person, firm association,
partnership, corporation or other entity which conducts or engages in the
Business in the Territory with respect to any activity that competes with the
Business;

          (c)  Influence or attempt to influence any person, firm, association,
partnership, corporation or other entity who is a contracting party with the
Company at any time during the Restriction Period to terminate any written
agreement with the Company except to the extent the Executive is acting on
behalf of the Company in good faith; or

          (d)  Hire or attempt to hire for employment any person who is employed
by the Company at the time of hiring or attempted hiring or whose active
employment with the Company ceased less than six months prior to such time, or
attempt to influence any such person to terminate employment with the Company,
except to the extent the Executive is acting on behalf of the Company in good
faith; provided, however, that nothing herein shall prohibit the Executive from
general advertising for personnel not specifically targeting any employee or
other personnel of the Company.

          The restrictive provisions of this Agreement shall not prohibit the
Executive from having as an investment an equity interest in the securities of
any corporation engaged in the Business, which securities are listed on a
recognized securities exchange or traded in the over-the-counter market to the
extent that such interest does not exceed 2% of the value or voting power of
such corporation and does not constitute control of such corporation. For
purposes of this Section 6 and Sections 7, 8, 9 and 10 of this Agreement, the
term "Company" shall include the Company and each of its affiliates.

          7.   CONFIDENTIAL INFORMATION. The Executive acknowledges and agrees
that all material information that is not publicly available or generally known
in the industry concerning the Company's business including, without limitation,
information relating to its products, customer lists, pricing, trade secrets,
patents, business methods, and cost data, business plans and strategies
(collectively, the "CONFIDENTIAL INFORMATION") is and shall remain the property
of the Company. The Executive recognizes and agrees that all of the material

                                       7
<PAGE>   8

Confidential Information, whether developed by the Executive or made available
to the Executive, other than information that is not material to the Company or
generally known to the public or generally known in the industry, is a unique
asset of the business of the company, the disclosure of which would be damaging
to the Company. Accordingly, the Executive agrees to hold such material
Confidential Information in a fiduciary capacity for the benefit of the Company.
The Executive agrees that he will not at any time during or within 10 years
after the Executive's employment with the Company for any reason, directly or
indirectly, disclose to any Person any material Confidential Information the
disclosure of which could harm the Company, other than information that is
already known to the public or generally know in the industry, except as may be
required in the ordinary course of business of the Company or as may be required
by law. Promptly upon the termination of this Agreement for any reason, the
Executive agrees to return to the Company any and all documents, memoranda,
drawings, notes and other papers and items (including all copies thereof,
whether electronic or otherwise) embodying any Confidential Information of the
Company which are in the possession or control of the Executive. Information
concerning the Company's business that becomes public as a result of the
Executive's breach of this Section 7 shall be treated as Confidential
Information this Section 7. The Executive shall not be deemed to have breached
this Section 7 unless the disclosure of such Confidential Information actually
causes harm to the Company or any of its affiliates.

          8.   BREACH OF CERTAIN PROVISIONS. The Executive acknowledges that a
violation on the Executive's part of any of the covenants contained in Sections
6 or 7 of this Agreement would cause immeasurable and irreparable damage to the
Company. The Executive represents that his economic means and circumstances are
such that the provisions of this Agreement, including the non-competition,
non-solicitation of employees, confidentiality and Company property provisions,
will not prevent him from providing for himself and his family on a basis
satisfactory to him and them. Accordingly, the Executive agrees that the Company
shall be entitled to injunctive relief in any court of competent jurisdiction
for any actual or threatened violation of any such covenant in addition to any
other remedies it may have. The Executive agrees that in the event that any
arbitrator or court of competent jurisdiction shall finally hold that any
provision of Sections 6 or 7 hereof is void or constitutes an unreasonable
restriction against the Executive, the provisions of such Section shall not be
rendered void but shall apply to such extent as such arbitrator or court may
determine constitutes a reasonable restriction under the circumstances. Any
breach by the Executive of the provisions of Sections 6 or 7 of this Agreement
shall relieve the Company of all obligations to any further payments to the
Executive pursuant to this Agreement (including under all Company equity award
grants pursuant to Section 3) or otherwise under any incentive or equity awards
made by the Company and, in the case of a breach of Section 6 of this Agreement,
shall entitle the Company to repayment from the Executive, upon demand, of all
amounts previously paid to the Executive following or in the six months
preceding such breach with respect to previously granted equity awards (i.e., in
the case of any stock options, the net gain realized by the Executive with
respect thereto during such period). These remedies are in addition to any other
remedies the Company may have with respect to any such breach.

                                       8
<PAGE>   9

          9.   PROPERTY OF THE COMPANY. The Executive acknowledges that from
time to time in the course of providing services pursuant to this Employment
Agreement, he shall have the opportunity to inspect and use certain property,
both tangible and intangible, of the Company, including Confidential
Information. The Executive hereby agrees that such property shall remain the
exclusive property of the Company and shall be returned to the Company upon the
Executive's termination of employment.

          10.  INTANGIBLE ASSETS. The Executive shall not at any time have or
claim any right, title or interest in any trade name, trademark, copyright, or
other similar rights belonging to or used by the Company and shall not have or
claim any rights, title or interest in any material or matter of any sort
prepared for or used in connection with the business of the Company or promotion
of the Company, whether produced, prepared or published in whole or in part by
the Executive.

          11.  LITIGATION; COOPERATION. If this Agreement is terminated by the
Company other than for Cause or by the Executive for Good Reason, in
consideration of the payments to be made to the Executive by the Company
pursuant to Section 5(b) of this Agreement, the Executive agrees, during the
period that the Company is actually making such payments to the Executive and
providing benefits to the extent required pursuant to Section 5(b), to provide
to the Company and its affiliates truthful and complete cooperation including,
but not limited to, the Executive's appearance at interviews and depositions at
reasonable times (taking into account the Executive's then employment and place
of residence) in all regulatory and litigation matters relating to the Company
and the Executive's employment by the Company, whether or not such matters have
been commenced at the time of such termination, and to provide to counsel to the
Company and its affiliates, upon request, all documents in the Executive's
possession or under his control relating to such regulatory and litigation
matters, all at no additional compensation to the Executive; provided, however,
that the Company will reimburse the Executive for (A) all reasonable expenses,
including travel, lodging, meals and attorneys' fees and (B) any salary
forfeited by the Executive or vacation time consumed by him during time spent by
the Executive, in connection with the foregoing.

          12.  RELEASE. In consideration of the payments to be made to the
Executive pursuant to Section 5(b) of this Agreement and as a condition to the
payment thereof, the Executive acknowledges that all such payments, if made in
accordance with the terms of this Agreement, shall constitute complete
satisfaction of all obligations owed by the Company to the Executive hereunder
and shall further constitute the Executive's sole remedy against the Company
regarding the Executive's employment hereunder. The parties hereby agree that if
this Section 12 becomes applicable they will execute a mutually acceptable
general release to reflect the provisions of this Section..

          13.  ARBITRATION. Any dispute, controversy, or question arising under,
out of, or relating to this Agreement (or the breach thereof) or, Executive's
employment with the Company or termination thereof (including, but not limited
to, claims of discrimination), shall be referred for arbitration to be held in
Miami, Florida (or such other place as the parties and the arbitrator shall
agree) to a neutral arbitrator selected by the Executive and the Company and
this shall be the exclusive and sole means for resolving such dispute (other

                                       9
<PAGE>   10

than for injunctive relief under Section 8 of this Agreement). The arbitration
shall be conducted in accordance with the Employment Arbitration Rules (the
"Rules") of the American Arbitration Association (the "AAA") in effect at the
time of the arbitration, except that the arbitrator shall be selected by
alternatively striking from a list of five arbitrators supplied by the AAA, and
the decision of the arbitrator shall be governed by the rule of law. Such right
to submit a dispute arising hereunder to arbitration and the decision of the
neutral arbitrator shall be final, conclusive and binding on all parties and
interested persons and no action at law or in equity shall be instituted or, if
instituted, further prosecuted by either party other than to enforce the award
of the neutral arbitrator. The arbitrator shall take submissions and hear
testimony, if necessary, and shall render a written decision as promptly as
possible. The arbitrator may require discovery for good cause shown. Each party
shall bear its own costs and expenses incurred in connection with any such
arbitration; provided the Company will initially pay for the fees, time, charges
and expenses of the arbitrator and the AAA; provided, further that the
arbitrator shall be entitled to award to the prevailing party reimbursement of
its reasonable legal costs and expenses (including with respect to the
arbitrator and the AAA).

          14.  SUCCESSORS

          (a)  This Agreement is personal to the Executive and, without the
prior written consent of the Company, shall not be assignable by the Executive
except by will or the laws of descent and distribution. This Agreement shall
inure to the benefit of and be enforceable by the Executive's legal
representatives.

          (b)  This Agreement shall inure to the benefit of and be binding upon
the Company and its successors and assigns, provided that the Company may not
assign this Agreement except in connection with the assignment or disposition of
all or substantially all of the assets or stock of the Company. This Agreement
shall be assigned by the Company to AT&T Latin America Corp. upon the
consummation of the transactions contemplated by the Merger Agreement. Except as
specifically provided in this Agreement, "Company" shall mean both the Company
as defined above and any such successor, by operation of law or otherwise.

          15.  MISCELLANEOUS.

          (a)  This Agreement shall be governed by, and construed in accordance
with, the laws of the State of Florida, without reference to its conflict of law
rules.

          (b)  All notices and other communications under this Agreement shall
be in writing and shall be given by hand delivery to the other party or by
registered or certified mail, return receipt requested, postage prepaid,
addressed as follows:

          IF TO THE EXECUTIVE.

          Thomas C. Canfield
          c/o Deborah A. Kurtzberg, Esq.
          Cleary, Gottlieb, Steen & Hamilton
          One Liberty Plaza
          New York, NY 10006

                                       10
<PAGE>   11

          IF TO THE COMPANY

          TO ITS CHIEF EXECUTIVE OFFICER
          FIRSTCOM CORP.
          220 ALHAMBRA CIRCLE
          SUITE 910
          CORAL GABLES, FL 33134

          with a copy to:

          AT&T Corp.
          295 North Maple Avenue
          Basking Ridge, NJ 07920
          Attention:  Executive Vice-President, Human Resources

or to such other address as either party furnishes to the other in writing in
accordance with this paragraph. Notices and communications shall be effective
when actually received by the addressee.

          (c)  The invalidity or unenforceability of any provision of this
Agreement shall not affect the validity or enforceability of any other provision
of this Agreement. If any provision of this Agreement shall be held invalid or
unenforceable in part, the remaining portion of such provision, together with
all other provisions of this Agreement, shall remain valid and enforceable and
continue in full force and effect to the fullest extent consistent with law.

          (d)  Notwithstanding any other provision of this Agreement, the
Company may withhold from amounts payable under this Agreement, and shall pay
over to the appropriate authorities in a manner consistent with all applicable
requirements, all federal, state, local and foreign taxes that are required to
be withheld by applicable laws or regulations.

          (e)  The Executive's or the Company's failure to insist upon strict
compliance with any provision of, or to assert any right under, this Agreement
shall not be deemed to be a waiver of such provision or right or of any other
provision of or right under this Agreement. This Agreement may not be amended or
modified except by a written agreement executed by the parties hereto or their
respective successors and legal representatives.

                                       11
<PAGE>   12

                 IN WITNESS HEREOF, the Executive has hereunto set the
Executive's hand and, pursuant to the authorization of its Board of Directors,
the Company has caused this Agreement to be executed in its name on its behalf,
all as of the day and year first above written.

                                               FirstCom Corporation

                                               By: Patricio Northland
                                                  ------------------------------
                                               Title: Chief Executive Officer
                                                      --------------------------

                                               Thomas C. Canfield

                                               /s/ Thomas Canfield
                                               ---------------------------------

                                       12

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00012-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00012-of-00352.parquet"}]]