EMPLOYMENT AGREEMENT



                  This AGREEMENT is entered into on September 25, 2006 by and

between Sonia Clark (the "Executive") and Align Technology, Inc., a Delaware

corporation (the "Company").



                  1.       Duties and Scope of Employment.

                           ------------------------------



                              (a)  Position.  For the term of her employment

    under this Agreement ("Employment"), the Company agrees to employ the

    Executive in the position of Vice President, Human Resources. The Executive

    shall report to the Chief Executive Officer (the "CEO"). The Executive

    accepts such employment and agrees to discharge all of the duties normally

    associated with said position, and to faithfully and to the best of her

    abilities perform such other services consistent with her position as Vice

    President, Human Resources as may from time to time be assigned to him by

    the CEO.



                              (b)  Obligations  to the Company.  During the term

    of her Employment, the Executive shall devote her full business efforts and

    time to the Company. The Executive agrees not to actively engage in any

    other employment, occupation or consulting activity for any direct or

    indirect remuneration without the prior approval of the CEO, provided,

    however, that the Executive may, without the approval of the CEO, serve in

    any capacity with any civic, educational or charitable organization. The

    Executive may own, as a passive investor, no more than one percent (1%) of

    any class of the outstanding securities of any publicly traded corporation.



                              (c)  No  Conflicting  Obligations.  The  Executive

    represents and warrants to the Company that she is under no obligations or

    commitments, whether contractual or otherwise, that are inconsistent with

    her obligations under this Agreement. The Executive represents and warrants

    that she will not use or disclose, in connection with her employment by the

    Company, any trade secrets or other proprietary information or intellectual

    property in which the Executive or any other person has any right, title or

    interest and that her employment by the Company as contemplated by this

    Agreement will not infringe or violate the rights of any other person or

    entity. The Executive represents and warrants to the Company that she has

    returned all property and confidential information belonging to any prior

    employers.



                              (d)  Commencement  Date. The Executive  commenced

    full-time Employment on September 25, 2006.



                  2.       Cash and Incentive Compensation.

                           -------------------------------



                              (a)  Salary.  The Company shall pay the Executive

    as compensation for her services a base salary at a gross annual rate of

    $250,000, payable in accordance with the Company's standard payroll

    schedule. The compensation specified in this Subsection (a), together with

    any adjustments by the Company from time to time, is referred to in this

    Agreement as "Base Salary."



                                       1.

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                              (b)  Target  Bonus.  The  Executive  shall be

    eligible to participate in an annual bonus program that will provide her

    with an opportunity to earn a potential annual bonus equal to 60% of the

    Executive's Base Salary. The amount of the bonus shall be based upon the

    performance of the Executive, as set by the individual performance

    objectives described in this Subsection, and the Company in each calendar

    year, and shall be paid by no later than January 31 of the following year,

    contingent on the Executive remaining employed by the Company as of such

    date. The Executive's individual performance objectives and those of the

    Company's shall be set by the CEO after consultation with the Executive by

    no later than March 31, of each calendar year. Any bonus awarded or paid to

    the Executive will be subject to the discretion of the Board; provided,

    however, that for calendar year 2006, the Company guarantees that Executive

    will be paid a prorated bonus based on the number of days of such year that

    the Executive was employed by the Company equal to $37,500.



                              (c)  Incentive  Awards.  The  Executive  shall be

    eligible for an annual incentive stock option grant and/or restricted stock

    unit award subject to the approval of the Board. The per share exercise

    price of the option will be equal to the per share fair market value of the

    common stock on the date of grant, as determined by the Board of Directors.

    The term of such option shall be ten (10) years, subject to earlier

    expiration in the event of the termination of the Executive's Employment.

    The Executive shall vest in 25% of the option shares after the first twelve

    (12) months of continuous service and shall vest in the remaining option

    shares in equal monthly installments over the next three (3) years of

    continuous service. Each restricted stock unit award vests 25% on the one

    year anniversary of the date of grant with 6.25% vesting quarterly

    thereafter. The grant of each such option and/or restricted stock unit shall

    be subject to the other terms and conditions set forth in the Company's 2005

    Incentive Plan and in the Company's standard form of stock option agreement

    and restricted stock unit agreement, as applicable.



                  3.       Vacation and Executive Benefits. During the term of

                           -------------------------------

her Employment, the Executive shall be eligible for 17 days vacation per year,

in accordance with the Company's standard policy for senior management, as it

may be amended from time to time. During the term of her Employment, the

Executive shall be eligible to participate in any employee benefit plans

maintained by the Company for senior management, subject in each case to the

generally applicable terms and conditions of the plan in question and to the

determinations of any person or committee administering such plan.



                  4.       Business Expenses. During the term of her Employment,

                           -----------------

the Executive shall be authorized to incur necessary and reasonable travel,

entertainment and other business expenses in connection with her duties

hereunder. The Company shall reimburse the Executive for such expenses upon

presentation of an itemized account and appropriate supporting documentation,

all in accordance with the Company's generally applicable policies.



                  5.       Term of Employment.

                           ------------------



                              (a)  Basic Rule. The Company agrees to continue

    the Executive's Employment, and the Executive agrees to remain in Employment

    with the Company, from the commencement date set forth in Section 1(d) until

    the date when the Executive's Employment terminates pursuant to Subsection

    (b) below. The Executive's Employment with the Company shall be "at will,"

    and either the Executive or the Company may terminate the Executive's

    Employment at any time, for any reason, with or without Cause. Any contrary

    representations, which may have been made to the Executive shall be

    superseded by this Agreement. This Agreement shall constitute the full and

    complete agreement between the Executive and the Company on the "at will"

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