<PAGE>   1
                         EXECUTIVE EMPLOYMENT AGREEMENT

THIS AGREEMENT is made as of the 5th day of February, 1998, between NICHOLAS A.
TILIACOS, a Washington resident ("Executive"), and MOSAIX, INC., a Washington
corporation ("Company").

IN CONSIDERATION of the mutual covenants and promises contained herein, the
parties agree as follows:

1.       EMPLOYMENT.

The Company hereby employs Executive, and Executive hereby accepts employment by
the Company, as the Company's President and Chief Executive Officer, responsible
for the management and direction of the day-to-day business operations of the
Company, subject to the direction and control of the Board of Directors of the
Company and to the terms of the Articles of Incorporation and Bylaws of the
Company. The Executive will perform such additional duties as may be assigned
from time to time by the Board of Directors of the Company which relate to the
business of the Company, its subsidiaries or any business ventures in which the
Company or its subsidiaries may participate. This Agreement supersedes in its
entirety that certain Executive Employment Agreement dated February 26, 1996
between Executive and the Company.

2.       APPOINTMENT AS DIRECTOR.

Executive shall initially be a member of the Company's Board of Directors.
Thereafter, subject to and consistent with the Company's Articles of
Incorporation and ByLaws, and subject to and consistent with its
responsibilities under law, the Board of Directors will include Executive as a
part of the appropriate slate of Directors for whom it solicits proxies in
connection with the annual meeting of shareholders. Consistent herewith, it is
the intent of the Board of Directors to nominate Executive for election to serve
a three year term as a director of the Company at the next annual meeting of the
Company. If Executive's employment as President and Chief Executive Officer
terminates for any reason, Executive hereby resigns as a director, effective
upon such termination.

3.       ATTENTION AND EFFORT.

Executive will devote his full business time, attention and effort to the
Company's business and will use his skills and render services to the best of
his ability to serve the interests of the Company.

4.       TERM.

Unless otherwise terminated as provided in Section 7 of this Agreement,
Executive's term of employment under this Agreement shall commence as of the
date hereof and shall expire upon Executive's resignation or termination.

5.       COMPENSATION.

         5.1      BASE SALARY

         Executive's compensation shall consist, in part, of an annual base
         salary of $215,000 before all customary payroll deductions (the "Base
         Salary"). The Base Salary shall be paid in substantially equal
         installments at the same interval as other officers of the Company are
         paid, or otherwise in conformance with the Company's standard payroll
         practices. The Board of Directors of the Company shall determine any
         increases in the Base Salary in future years.

         5.2      BONUS

         Executive may be entitled to receive, in addition to the Base Salary,
         an annual bonus (the "Bonus") in an amount to be determined pursuant to
         the Company's Management Bonus Plan, CEO level, as approved by the
         Board of Directors of the Company, in effect for each calendar year.

         5.3      STOCK OPTIONS

         Executive has been granted incentive stock options &/or nonqualified
         stock options to purchase 187,500 shares of common stock of the Company
         pursuant to the terms of the Company's 1996 Stock Incentive
         Compensation Plan (the "Option Plan").

6.       BENEFITS AND EXPENSES.

         6.1      EXPENSES

         The Company shall promptly reimburse Executive for all reasonable and
         necessary business expenses incurred and advanced by him in carrying
         out his duties under this Agreement, consistent with Company policies
         in connection therewith. Executive shall present to the Company from
         time to time an itemized account of such expenses in such form as
         Company policies may require.


                                       1
<PAGE>   2
         6.2      BENEFITS

         During the term of employment hereunder, Executive shall be entitled to
         participate fully in any benefit plans, programs, policies and fringe
         benefits which may be made available to the senior executives of the
         Company generally, including medical, dental, disability, pension and
         retirement benefits, life insurance and other death benefits. Executive
         will initially be entitled to 3 weeks vacation per year and any other
         vacation or personal time off in accordance with Company policy.

         6.3      OTHER

         The Company shall provide Executive an office and with secretarial
         support suitable to the position of President.

7.       TERMINATION.

         7.1      BY THE COMPANY

         With or without "Cause" (as defined in the Option Plan), the Company
         may terminate the employment of Executive at any time during the term
         upon giving Notice of Termination (as defined below).

         7.2      BY EXECUTIVE

         Executive may terminate his employment at any time for Good Reason (as
         defined below) or otherwise upon giving Notice of Termination.

         7.3      AUTOMATIC TERMINATION

         Employment shall terminate automatically upon death or total disability
         of Executive. The term "total disability" as used herein means an
         inability to perform the duties set forth in paragraph 1 of this
         Agreement because of illness or physical or mental disability for a
         period or periods aggregating 180 calendar days in any 12-month period,
         unless Executive is granted a leave of absence by the President or the
         Board of Directors of the Company. Executive and Company hereby
         acknowledge that Executive's ability to perform the duties specified in
         paragraph 1 hereof is of the essence of this Agreement. Termination
         hereunder shall be deemed to be effective immediately upon Executive's
         death or 30 days following a Notice of Termination based upon a
         determination by the Board of Directors of the Company of Executive's
         total disability as defined herein.

         7.4      NOTICE

         The term "Notice of Termination" means written notice of termination of
         Executive's employment. At the election of the Company, as set forth in
         its Notice of Termination or in a written response to Executive's
         Notice of Termination, Executive's employment and performance of
         services shall continue for a period of 30 days following the Notice of
         Termination. Otherwise Executive's employment shall terminate effective
         upon receipt of the Notice of Termination, unless otherwise agreed
         between the parties.

         7.5      GOOD REASON

         For the purposes of this Agreement, "Good Reason" means, as a result of
         or following a "Corporate Transaction" of the Company (as defined in
         the Option Plan), a material alteration of Executive's position or
         duties, a reduction of Executive's Base Salary, or a requirement that
         Executive move more than 100 miles, provided that Executive gives
         Notice of Termination within 30 days of such change.

8.       SEVERANCE PAYMENTS.

In the event of termination of the employment of Executive, all compensation and
benefits set forth in this Agreement shall terminate as of the effective date of
termination, provided, however, that if the Company terminates Executive's
employment without Cause, or if Executive terminates his employment for Good
Reason, the Company shall be obligated to pay to Executive his then regular Base
Salary for a period of 12 months after the effective date of termination of
employment.

9.       AGREEMENT NOT TO COMPETE OR SOLICIT EMPLOYEES

As a condition of his employment hereunder, Executive has executed and delivered
to the Company an agreement addressing his obligation not to compete with the
business of the Company (the "Non-Compete Agreement") in accordance with
standard Company policy, which Non-Compete Agreement shall survive termination
of Executive's employment. During the term of this Agreement, and for 12 months
following termination of employment hereunder, Executive will not solicit or
otherwise recruit, directly or indirectly, any employees of the Company for
employment elsewhere.

10.      AGREEMENT NOT TO DISCLOSE CONFIDENTIAL INFORMATION

As a condition of his employment hereunder, Executive has executed and delivered
to the Company an agreement addressing the nondisclosure of confidential
information and ownership of inventions (the "Non-Disclosure 


                                       2
<PAGE>   3
Agreement") in accordance with standard Company policy, which Non-Disclosure
Agreement shall survive termination of Executive's employment.

11.      FORM OF NOTICE.

Every notice required by the terms of this Agreement shall be given in writing
by serving the same upon the party to whom it was addressed personally, by
courier, by facsimile transmission (with hard copy delivered by overnight
courier) or by registered or certified mail, return receipt requested, at the
address set forth below or at such other address as may hereafter be designated
by notice given in compliance with the terms hereof:

     If to Executive:      Nicholas A. Tiliacos
                           1130 Lancaster Way SE
                           Issaquah, WA 98029

     If to Company:        Mosaix, Inc.
                           6464 185th Avenue NE
                           Redmond, WA 98052
                           Attn.:   Wm. Bradford Weller,
                                    General Counsel

Notice shall be effective upon personal delivery, delivery by courier, receipt
of facsimile transmission or three days after mailing.

12.      ASSIGNMENT.

Executive agrees that this Agreement may be transferred or assigned by the
Company to (a) any corporation resulting from any merger, consolidation or other
reorganization to which the Company is a party or (b) any corporation,
partnership, association or other person to which the Company may transfer all
or substantially all of the assets and business, and such assignee or transferee
shall succeed to the rights and obligations of the Company hereunder. This
Agreement may not be assigned by Executive.

13.      WAIVER.

No waiver of any of the provisions of this Agreement shall be valid unless in
writing, signed by the party against whom such claim or waiver is sought to be
enforced, nor shall failure to enforce any right hereunder constitute a
continuing waiver of the same of a waiver of any other right hereunder.

14.      AMENDMENTS IN WRITING.

No amendment, modification, waiver, termination or discharge of any provision of
this Agreement, nor consent to any departure therefrom by either party hereto,
shall in any event be effective unless the same shall be in writing,
specifically identifying this Agreement and the provision intended to be
amended, modified, waived, terminated or discharged, and signed by the Company
and Executive. No provision of this Agreement shall be varied, contradicted or
explained by any oral agreement, course of dealing or performance or any other
matter not set forth in an agreement in writing and signed by the Company and
Executive.

15.      APPLICABLE LAW -- VENUE.

This Agreement shall be governed by the laws of the state of Washington, without
regard to its conflicts of laws provisions. Venue of any action brought to
enforce or interpret this Agreement shall be in Seattle, Washington, and the
parties consent to jurisdiction in the federal and state courts in such venue.

16.      SEVERABILITY.

In the event that any provision of this Agreement shall be determined by any
court or arbitrator of competent jurisdiction to be unenforceable or otherwise
invalid for any reason, such provision shall be enforced and validated to the
extent permitted by law, and the court or arbitrator shall have the power to
reform such provision to the extent necessary for such provision to be
enforceable under applicable law. All provisions of this Agreement are
severable, and the unenforceability of any single provision hereof shall not
affect the remaining provisions.

17.      HEADINGS.

All headings or titles in this Agreement are for the purpose of reference only
and shall not in any way affect the interpretation or construction of this
Agreement

18.      ATTORNEYS FEES & COSTS.

In any action or proceeding brought by either party against the other arising
out of or in any way relating to this Agreement, the prevailing party shall, in
addition to other allowable costs and remedies, be entitled to an award of
reasonable attorneys' fees and costs incurred in connection with such action or
proceeding.


                                        3
<PAGE>   4
IN WITNESS WHEREOF, the parties have executed and entered into this Agreement as
of the date above first written.

EXECUTIVE:                       COMPANY:

                                 MOSAIX, INC.,
                                 a Washington Corporation



NICHOLAS A. TILIACOS             By : ___________________________________
                                      Wm. Bradford Weller
                                      Its  General Counsel & Assistant Secretary


                                       4