Document:

EX-10.1

August 20, 2013

Mr. Rich Tobin

13 Court Street

Wakefield, MA 01880

Dear Rich

On behalf of Lionbridge Technologies, Inc. (“the Company”) I am pleased to offer you the position
of Senior Vice President/General Manager, GLT Operations, based at our Waltham headquarters,
reporting to me, Rory Cowan, Chief Executive Officer. This letter is provided to you to summarize
the terms and conditions of your “at will” employment, and is not intended to be, and should not be
construed as, an employment contract. This offer is contingent on the successful completion of the
Company’s standard background check. The details of our offer are outlined below:

Start Date: Your start date is projected to be September 16, 2013

Base Salary: Your starting gross base salary will be at the rate of $320,000 per annum. Payroll
payment periods are currently bi-weekly and are subject to change at Company discretion.

Restricted Stock: Subject to approval by the Company’s Board of Directors, Lionbridge will grant
you restricted stock of 80,000 shares and 20,000 options. The stock will be granted under the
Company’s Stock Incentive Plan. The specific terms and conditions of such Restricted Stock
grant shall be set forth in, and governed by, the Company’s standard form of Restricted Stock
Agreement.

Incentive Compensation: You are eligible to participate in the Management Incentive Plan (MIP)
with a target bonus for 60% of your base salary. Payment of any incentive compensation under
the MIP is dependent on achievement of company performance targets relating to revenue and
profitability, and achievement of personal objectives, all as established and determined by the
Board of Directors.

Sign on Bonus: You will receive a sign on bonus in the amount of $47,500 which will be paid to
you in the first payroll of your employment.

Severance: Should you be terminated for any reason other than cause or termination which is
covered in the Change of Control agreement, you will receive a twelve (12) month severance
package paid over a twelve (12) month period. You will receive benefits during the twelve (12)
month period based on the benefits currently in force at time of termination.

Change of Control Agreement: You will receive a Change of Control Agreement upon hire.

Confidentiality Agreement: You will be required to sign the enclosed Business Protection
Agreement (“BPA”) that sets forth your obligations of confidentiality among other topics.

Benefits: Effective on the first day of the month after you begin employment, you and eligible
members of your immediate family will be able to participate in our comprehensive benefits
program that currently includes a medical and dental plan, life and disability insurance, and
401(k) plan. You will also participate in the enhanced Executive benefits program. The coverage
and protections afforded by these programs will be discussed with you at your orientation
meeting.

Vacation: Your vacation eligibility will be four weeks per full calendar year. Vacation time
does not accrue and is not carried over into subsequent years.

This offer is subject to completion of the following:

	 	•	 	Criminal/ background checks

	 	•	 	Fair credit reporting act documents

	 	•	 	Verification of authorization to work (as described below)

Due to the Immigration Reform and Control Act of 1986, employers need to verify authorization to
work in the United States. Enclosed is US Department of Justice Form I-9 that must be completed
and returned to Human Resources within three business days after your start date. Please come
prepared on your first day with verification documents as shown on page 2 of that form, under
“Lists of Acceptable Documents.”

Rich, we believe you have a good understanding of the position as it was described to you in your
interviews and are truly optimistic about the potential represented by this opportunity, as well as
the contribution we feel you will make to the long term growth of Lionbridge. We would like to
remind you; however, that employment with the Company is at will, meaning that either the Company
or you may terminate the employment relationship at any time, for any lawful reason, with or
without prior notice.

To accept our offer, please sign your name in the designated space on the last page of the BPA, and
return the original to me. The BPA will be countersigned and a copy of the fully executed document
will be returned to you for your records.

If you have any questions, please contact me. We look forward to working with you and to your
contribution to the continued success of our company.

Welcome to the team!

Sincerely,

/s/ Rory Cowan

Rory Cowan

Chief Executive Officer

ATTACHMENTS:

	 	•	 	Business Protection AgreementEX-10.2

EMPLOYMENT AND BUSINESS PROTECTION AGREEMENT

We, Lionbridge Technologies, Inc. (“Lionbridge” or “we”) and you employee name (“you”) have
agreed to enter into the following Employment and Business Protection Agreement (“Agreement”). In
consideration of your employment as an employee with LIONBRIDGE, the opportunities for advancement
that such employment may provide you, the compensation paid to you by LIONBRIDGE and other good and
valuable consideration, we and you agree as follows:

AGREEMENT

1. Terms of Engagement. We agree to employ you and you agree to be employed for the terms
and on the conditions stated in this Agreement. Your employment shall begin on hire date in the
position of title. This is a full-time, exempt position. You agree to perform at all times,
faithfully, industriously, and to the best of your ability, all duties and functions consistent
with your position that you may be called upon to perform and to abide by any general employment
guidelines or policies adopted by us as they may be implemented and/or amended from time to time.
We may from time to time in our discretion modify your position and/or job title. You understand
and agree that your employment relationship with us is an at-will relationship and that either you
or we may terminate the relationship with or without notice or cause, at any time during the course
of your employment with us. You further understand that at all times when you are performing
services under this Agreement, your sole employer is LIONBRIDGE, even if you work closely with or
take direction from another entity.

2. Compensation. Compensation for your services to LIONBRIDGE shall be $       per pay
period, minus lawful withholdings, payable according to our normal payroll practices. We may from
time to time at our discretion modify your compensation.

3. Employee Benefits. You shall be eligible for employee benefits provided to employees at
your level, including, if provided, medical, dental, and disability insurance and paid sick leave
and vacation according to the terms provided by us to other employees of your level. Such benefits
may be amended or discontinued by us at any time.

4. Confidential Information.

a. Definition. You understand that during the course of your employment with
LIONBRIDGE, you will have access to Confidential Information, the ownership and confidential status
of which are highly important to LIONBRIDGE. You further acknowledge and agree that the term
“Confidential Information” shall mean any information of LIONBRIDGE (including any parent,
subsidiary, predecessor, successor, or otherwise affiliated corporation, partnership or other
business enterprise), whether or not in written form, which has not been previously disclosed to
the general public by LIONBRIDGE and which is either designated or treated by LIONBRIDGE as
confidential or proprietary, or which LIONBRIDGE is obligated to keep confidential because it has
been provided by people or entities other than LIONBRIDGE. Consistent with the definition set
forth above, the term “Confidential Information” shall include, but is not limited to,
LIONBRIDGE’s: trade secrets; product, research and development information; inventions; methods of
conducting or obtaining business, including but not limited to, methods of marketing, client
acquisition and development, billing for services, and compensation; corporate documents, plans or
manuals; finances; legal affairs; labor reports; identified locations for new operations; actual or
prospective (if known to you) clients, customers, or investors (collectively “Corporate Contacts”);
and other information marked, designated and/or treated by LIONBRIDGE as confidential.

b. Protections. You agree to hold all Confidential Information in a fiduciary
capacity and to exercise the highest degree of care in safeguarding Confidential Information
against loss, theft, or other inadvertent disclosure, and shall take all steps reasonably necessary
to maintain the confidentiality thereof. You shall not, directly or indirectly, either during the
term of your employment (except as required in the normal course of the performance of your
duties), or at any time after your employment is terminated for any reason: (i) disclose or
furnish to any person, corporation or other entity, or use in your own or in any other person’s
business, any Confidential Information; (ii) utilize Confidential Information for the gain,
advantage, or profit of anyone other than LIONBRIDGE; (iii) remove any Confidential Information
from LIONBRIDGE’s premises; or (iv) take advantage of any business opportunity which, because of
Confidential Information obtained in your employment capacity or as a result of your employment,
you know LIONBRIDGE may or is likely to consider.

c. Subpoenas. If you are served with any subpoena or other compulsory judicial or
administrative process calling for production of Confidential Information, you agree to immediately
notify LIONBRIDGE in order that LIONBRIDGE may take such action as it deems necessary to protect
its interests.

5. Non-Solicitation of Clients and Corporate Contacts.

a. Employees. Unless you receive the prior express written consent of LIONBRIDGE, you
shall not during the term of your employment and for twelve (12) months after termination of your
employment, induce or attempt to induce, directly or by assisting others, any person who is in the
employment of LIONBRIDGE to leave such employment for the purpose of accepting other employment
with or providing services to a person or entity that provides products or services that are
competitive with LIONBRIDGE.

b. Corporate Contacts. Unless you receive the prior express, written consent of
LIONBRIDGE, you shall not, during the term of your employment and for twelve (12) months after
termination of your employment, for purposes of providing products or services that are competitive
with LIONBRIDGE, solicit or attempt to solicit, directly or by assisting others, any work,
services, goods, or other business from any of Corporate Contacts (as defined in Paragraph 4) of
LIONBRIDGE.

6. Need for and Scope of LIONBRIDGE Protections.

a. Need for LIONBRIDGE Protection. You recognize and acknowledge that: (i)
LIONBRIDGE’s Confidential Information is and shall continue to be the exclusive and permanent
property of LIONBRIDGE, whether or not prepared in whole or in part by you, and whether or not
disclosed or entrusted to you in connection with your duties for LIONBRIDGE; (ii) Confidential
Information shall not be deemed disclosed to the public due to its being disclosed to you, to any
past, present, or potential employees of LIONBRIDGE or to any Corporate contact; (iii) LIONBRIDGE
has a vital and substantial interest in maintaining the confidentiality of its Confidential
Information, in maintaining a stable work force, in continuing its relationships with its Corporate
Contacts, in remaining in business, and in avoiding or minimizing any disruption of, damage or
impairment to, or interference with its business; and (iv) the Confidential Information and
Corporate Contacts that you will obtain as a result of your employment with LIONBRIDGE are special
and unique to LIONBRIDGE, and any breach by you of any of the terms and covenants of this Agreement
will result in irreparable and continuing harm to LIONBRIDGE for which there will be no adequate
remedy at law.

b. Scope of LIONBRIDGE Protection. You understand that LIONBRIDGE is a multi-national
corporation that does business all over the world. In your employment with LIONBRIDGE, you may
perform services in more than one city, county, state or country, and may have access to
Confidential Information that pertains not only to the specific area in which you live and/or work
but also to other areas in which LIONBRIDGE does business. You agree that LIONBRIDGE protections
stated in this Agreement are intended to protect LIONBRIDGE to the fullest extent of the law in all
of the geographical areas in which LIONBRIDGE does business or is actively contemplating doing
business. You further expressly acknowledge and agree that each of LIONBRIDGE protections stated
herein is intended to be as broad as may be permitted under the provisions of applicable law. You
further acknowledge and agree that if any of the protections herein are deemed unenforceable, the
unenforceability of any one or more LIONBRIDGE protections stated herein (or any portion thereof),
shall not affect the enforceability of any other protection (or portion thereof) stated herein.

7. Inventions/Ownership of Intellectual Property.

a. You agree that LIONBRIDGE shall be the sole and exclusive owner of all material, concepts,
inventions, improvements and Confidential Information whether patentable or not that you prepare,
develop, work on or make (whether alone or jointly with others) during your employment with
LIONBRIDGE and for a period of six (6) months thereafter, and of all related rights (including but
not limited to copyrights, trademarks and patents) and proceeds. To the extent applicable, all
such material, concepts, inventions, improvements and Confidential Information will constitute
“works made for hire” under applicable copyright laws with all copyrights in the work owned by
LIONBRIDGE. You shall execute all necessary assignments to vest ownership of such materials,
concepts, inventions, improvements and confidential information in LIONBRIDGE to obtain applicable
copyright, trademark, patent or similar protection in its name.

b. Notice. You understand that the provisions of this paragraph do not apply to any
inventions, materials, concepts or improvements created by you for which no equipment, supplies,
facilities or trade secrets information of LIONBRIDGE was used and which was developed entirely on
your own time, unless: (i) the invention, material, concept or improvement relates directly to
the business of LIONBRIDGE, or to LIONBRIDGE’s actual or demonstrably anticipated research and
development:; or (ii) the invention, material, concept or improvement results from any work
performed by you for LIONBRIDGE.

c. Attached to this Agreement as Exhibit A is a list and description of all patented and
unpatented inventions (including those for which patent applications are pending), which you have
made, conceived, or first reduced to practice prior to your employment with LIONBRIDGE, which you
desire to remove from the operation of this Agreement. You acknowledge and agree that except for
those inventions included on Exhibit A, all other inventions you make, conceive or reduce to
practice while employed by LIONBRIDGE, including without limitation, any modifications or
improvements to inventions listed on Exhibit A, are subject to the terms of this Agreement. If
Exhibit A is blank, then you represent you have made no such inventions at the time of signing this
Agreement.

8. LIONBRIDGE Property. All records, files, manuals, lists of clients, forms, materials,
supplies, computer programs or other software, computer hardware, tapes, disks or other magnetic
media, documents, notes, video or audio tapes or recordings, Confidential Information and other
materials furnished to you by LIONBRIDGE, used on its behalf, or generated or obtained during the
course of your employment with LIONBRIDGE remain the property of LIONBRIDGE. You understand that
you are only a holder of this property for the sole use and benefit of LIONBRIDGE and will take all
reasonable precautions to safely keep and preserve such property, except as consumed in the normal
business operation of LIONBRIDGE. Upon termination of your employment with LIONBRIDGE, and at any
other time upon LIONBRIDGE’s request, you agree to deliver as soon as reasonably possible to
LIONBRIDGE, or its authorized representative, all of LIONBRIDGE’s property, including all copies
thereof, then in your possession or control. You agree, except for LIONBRIDGE’s use, not to make
or cause to be made any copies, duplicates, facsimiles or other reproductions, or abstracts or
summaries, of any such materials or objects, or remove any such materials or objects from
LIONBRIDGE’s possession. Any personal property of yours acquired prior to your employment with
LIONBRIDGE or subsequently purchased at your personal expense for your personal use, remains your
property.

9. Disclosure of Prior Restrictions. You understand that LIONBRIDGE is not employing you
in order to obtain any information which is the property of any previous employers or any other
person or entity for whom you have performed services and represent that you are not currently
subject to any restriction which would prevent or limit you from carrying out your duties for
LIONBRIDGE. You agree that you will not take any action on behalf of LIONBRIDGE that would violate
a prior restriction or agreement to which you are subject, you will notify LIONBRIDGE immediately
if any such restriction or situation should arise and you will fulfill all obligations to present
or former employers and others during your service to LIONBRIDGE.

10. Resolution of Claims.

a. Both you and we mutually consent to the resolution by arbitration, pursuant to the then
current applicable Model Employment or Commercial Arbitration Rules of the American Arbitration
Association of all claims or controversies (“Claims”), arising out of or related to this Agreement
and your employment (or termination of employment), that we may have against you or that you may
have against us (including any parent, subsidiary, or otherwise affiliated corporation, partnership
or other business enterprise and all of its or their officers, directors, assigns, predecessors,
subsidiaries, affiliates, employers, employees representatives and agents); including, but not
limited to, Claims for wages, other compensation, wrongful termination, other wrongful employment
actions, breach of contract, tort, discrimination, benefits, or violation of any federal, state, or
governmental law, statute, regulation or ordinance; provided that Claims that you may have
for workers’ compensation or unemployment compensation benefits, or any administrative charge of
discrimination you may file, and Claims we may have for violations of Paragraph 4-9 of this
Agreement shall not be subject to arbitration pursuant to this Paragraph.

b. Either of us may bring an action in any court of competent jurisdiction to compel
arbitration under this Agreement and to enforce an arbitration award. Both we and you agree that
neither shall initiate or prosecute any lawsuit or administrative action in any way related to any
Claim covered by this Paragraph.

c. All costs of arbitration shall be borne equally by both parties, except where an
arbitrator determines that applicable law requires otherwise to maintain the enforceability of this
Paragraph. In such a case, LIONBRIDGE shall have the option of either paying the proportion of the
costs designated by the arbitrator or determining that the matter shall be excepted from the
provisions of this Paragraph that require arbitration of Claims.

11. Choice of Law. Due to the location of LIONBRIDGE’s corporate headquarters in the Commonwealth
of Massachusetts, the important role played by such corporate office in determining the terms and
conditions of employees’ employment and the need for predictability in the employment relationship,
you agree that this Agreement and all actions or suits hereunder shall be governed by and construed
in accordance with the substantive and procedural laws of the Commonwealth of Massachusetts and
this Agreement shall be considered to be a sealed instrument under Massachusetts law. Any claims
arising under this Agreement shall be instituted and commenced and venue shall be exclusively in
the Commonwealth of Massachusetts, or the United States District Court for the District of
Massachusetts. You waive the right to change such venue (except for by mutual consent) and hereby
consent to the jurisdiction of such courts for such Claims.

12. Assignability. You acknowledge that your contractual obligations under this Agreement
are personal and neither the rights nor obligations under this Agreement may be assigned or
transferred by you to any other person. You understand and agree that this Agreement will bind and
benefit any successor, subsidiary, parent or affiliate (collectively “successors”) of LIONBRIDGE,
whether by merger, sale of assets, reorganization, reassignment or other form of business
acquisition, disposition, reorganization or reassignment.

13. Enforcement of Agreement. You understand that LIONBRIDGE’s failure to insist upon
strict compliance with any term or condition of this Agreement shall not constitute a waiver of
such term or condition, nor shall any waiver or relinquishment of any right or power under this
Agreement at any one or more times be deemed a waiver or relinquishment of that right or power at
any other time. If any one or more of the provisions contained in this Agreement shall be held to
be invalid, illegal, or unenforceable in any respect under applicable law, the validity, legality
and enforceability of all remaining provisions shall not in any way be affected or impaired and all
provisions shall be enforceable to the fullest extent permitted under applicable law.

14. Headings. The paragraph headings in this Agreement are for convenience of reference
only and shall not be given any effect in the construction or interpretation hereof.

15. Entire Agreement. You understand that this Agreement contains your entire Agreement
with LIONBRIDGE with regard to the terms and conditions of employment and shall terminate and
supersede any prior written or oral Agreements or understandings between LIONBRIDGE and you
regarding the same. No waiver, amendment or modification of this Agreement or any portion thereof,
including any future representations that are inconsistent with the terms set forth herein, will be
valid unless made in writing and duly executed by you and the President and CEO of LIONBRIDGE.

16. Attorney Fees. The prevailing party in any suit or action to enforce this Agreement,
or any term hereof, shall be entitled to recover all its costs and expenses incurred in connection
with such suit or action, including without limitation reasonable attorney’s fees, and other fees
and costs incurred at all levels and proceedings.

17. Survival. Not withstanding any term or provision in this Agreement to the contrary,
you understand that the rights and obligations pursuant to this Agreement shall survive the
termination of your employment with LIONBRIDGE and shall inure to the benefit of any successor of
LIONBRIDGE.

18. Understanding. By signing below, you acknowledge that you have carefully read all of
the provisions of this Agreement and agree that they are reasonable and necessary for the
protection of LIONBRIDGE’s business, which has agreed to enter into and/or continue an employment
relationship with you based on your agreeing to enter into this Agreement. Your further understand
that your employment relationship with LIONBRIDGE is at will, and nothing in this Agreement
suggests or signifies otherwise.

IN WITNESS WHEREOF, each of the parties has duly executed this Agreement with the full
understanding of its meaning and significance, voluntarily and free of duress or any other
encumbrance.

LIONBRIDGE TECHNOLOGIES, INC.

Richard Tobin

By Michele Erwin , SVP HR

(Printed Name of Employee) September 16, 2013

/s/ Richard Tobin

(Signature of Employee)

1

EXHIBIT A

As referenced in Paragraph 7(c) of this Agreement, the following inventions are those which I
created prior to my employment with LIONBRIDGE which I desire to remove from the operation of this
Agreement:

1.

2.

SEA—DOCS:461734.1

SEA—DOCS:462872.1

2

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