Dominique Baly President, Bioscience Division Dear Dominique:

Exhibit 10.1

June 10, 2008

Xxxxxxxxx Xxxx

President, Bioscience Division

Dear Xxxxxxxxx:

As per our agreement, effective today, your employment with Millipore will terminate on December 31, 2008 and your termination will be governed by the Officer Severance Agreement dated September 13, 2007 between you and the company.

If the above accurately describes our agreement, please sign, date and return this letter.

Sincerely,

/s/ Xxxxxx Xxxxxx

Xxxxxx Xxxxxx, Ph.D.

Chairman, President and CEO

Agreed:

/s/ Xxxxxxxxx Xxxx

Xxxxxxxxx Xxxx

Date: June 10, 2008