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                                                                Exhibit 10.47

                            [LETTERHEAD OF OMG GROUP]

January 27, 2006

Mr. Daniel K. Lewis
356 Cheshire Road
Hudson, OH 44236

Dear Dan:

I am pleased to offer you the position of Vice President, Human Resources,
reporting to me. You will be a member of our Executive Committee and responsible
for the oversight and management of all human resources operations and
activities of the Company. We have tremendous challenges ahead as we grow the
business and set clear expectations and standards for our organization. I am
excited about the contribution I know you will make to our performance.

The following confirms the terms of our offer:

     1.   First year base salary of $265,000, with an annual salary and
          performance review in February each year thereafter starting in 2007.

     2.   Your start date will be February 20, 2006, or as soon thereafter as
          reasonably possible.

     3.   You will participate in our key management short term incentive plan
          under which you will be eligible to receive an annual cash bonus for
          each fiscal year of the company ending during your employment. Under
          the program, the Compensation Committee in consultation with me awards
          bonuses based on individual performance and Company results. The
          target amount of your bonus is 50% of your base salary and is based on
          the level of achievement of established performance goals. Your bonus
          will be paid in accordance with the company's practices for senior
          executives and is typically payable in February of each year. It is
          our understanding that you are expecting to receive a $100,000 bonus
          from Goodyear Tire and Rubber Company, your current employer, for your
          performance in 2005 (the "Expected Bonus"). In the event and to the
          extent that Goodyear does not pay any or all of the Expected Bonus to
          you, OM Group, Inc. will pay you an amount equal to the difference.

     4.   In addition to your salary and bonus, you will be compensated for the
          loss of your pension which is scheduled to vest in May of 2006. In
          consideration for joining OM Group, Inc. prior to that pension vesting
          date, the Company will pay you $62,500 on your start date (as set
          forth above) and $62,500 on February 20, 2007, so long as you are
          still employed by the Company on that date. The Company shall award
          you stock options to purchase 20,000 shares of the Company's common
          stock. Options are priced on the date of grant and will vest 33 1/3%
          per year for each full year of your continuous employment commencing
          on the first anniversary of the date of grant. The date of grant will
          be your start date. Thereafter stock options are typically granted in
          February of each year and you will be eligible to receive additional
          grants (starting in February 2007) in accordance with the Company's
          practices for senior executives.

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     5.   You will be eligible to participate in all of the Company's executive
          compensation plans, including any management incentive plans, life
          insurance plans, deferred compensation plans, supplemental retirement
          plans and equity plans, in which senior executives of the Company
          participates.


     6.   We will provide you with a car allowance in the amount of $1,500 per
          month. This allowance is intended to cover all costs, which include
          but are not limited to the purchase or lease price of a vehicle,
          insurance, registration, maintenance, taxes, etc. The allowance will
          be included in your paycheck on the first pay period of each month.

     7.   You are eligible for four (4) weeks of paid vacation and five (5)
          personal days of paid time off immediately.

     8.   You are eligible for participation in the Company's employee benefit
          and welfare plans, including the Company's Profit Sharing and
          Retirement Savings Plan (and any other plans providing for retirement
          benefits), medical, dental, vision, hospitalization, life or
          disability insurance and flexible spending. Enclosed are the
          highlights of our benefit plans.

     9.   You will be reimbursed, in the event and to the extent not otherwise
          paid by your current employer, for your personal travel from Brussels,
          Belgium to Cleveland, Ohio and the move of any incidentals in
          connection therewith up to $10,000.

     10.  We will pay for indoor parking for you at the Company's headquarters.

     11.  We will enter into an agreement relative to change of control with you
          within seven (7) days of your start date. The agreement will be in the
          form approved for all other similarly situated senior executives.

     12.  Within thirty (30) days of your start date, we will enter into an
          agreement relative to severance (one year base and bonus at target) in
          the event of (i) your termination without cause, or (ii) your
          departure from the company as a result of a material change in your
          reporting structure. This severance agreement will be for a term of
          three (3) years and may be renewed at the discretion of the
          Compensation Committee.

Please confirm your agreement to accept this position by returning one copy of
this letter; you may retain one copy for your records. We look forward to your
start date and to working with you.

Sincerely,

Joseph Scaminace
Chief Executive Officer

Agreed to this 30th day of January, 2006

/s/ Daniel K. Lewis
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Daniel K. Lewis