Exhibit 10.1 [letterhead of W. R. Grace & Co.] May 1, 1995 Mr. Albert J. Costello 417 Devonshire Drive Franklin Lakes, NJ 07417 Dear Mr. Costello: On behalf of the Board of Directors of W. R. Grace & Company (the "Board"), I am pleased to welcome you. This let- ter sets forth the terms on which you have agreed to be em- ployed by the Company effective as of May 1, 1995. Positions: Chairman of the Board, President, Chief Executive Officer and member of the Board Starting Date: May 1, 1995 as President and Chief Executive Officer. Election to the Board will be promptly after the Company's 1995 Annual Meeting. Term: Through April 30, 1998; in May of 1997, the Board will notify you of its intention re- garding renewal or nonrenewal of your em- ployment. Base Salary: $900,000 per year, subject to annual review. Bonus: For the period May 1 to December 31, 1995 -- minimum $900,000, payable after year- end. 1996 and thereafter -- subject to perfor- mance under the Annual Incentive Compensa- tion Plan or a successor plan. PAGE Mr. Albert J. Costello May 1, 1995 Page 2 Stock Options: Non-statutory stock options to purchase 300,000 shares to be granted under the 1994 Stock Incentive Plan, at the market price on May 1, 1995, to vest as follows: 100,000 shares -- May 1, 1996 100,000 shares -- May 1, 1997 100,000 shares -- May 1, 1998 Long-Term In- centive Plans: Effective May 1, 1995 (and based on May 1, 1995 stock price), participation on same basis as other senior executives of the Company (prorated from May 1, 1995) for 1993-1995, 1994-1996 and 1995-1997 cycles. Participation on the same basis as other senior executives of the Company beginning with 1996-1998 cycle. Insurance: Whole life policy, premium paid by Company, providing coverage of two times base salary Pension: Participation in all qualified and non- qualified pension, retirement and savings plans on the same basis as other senior executives of the Company Relocation: Payment of customary relocation expenses, including temporary housing, closing costs and moving expenses Change of Control: Change of control severance protection on the same terms as other senior executives of the Company Other: Comprehensive program of executive ben- efits, stock options and perquisites on the same basis as other senior executives of the Company Physical: We understand that you had a complete physical examination in late 1994, the re- sults of which were satisfactory PAGE Mr. Albert J. Costello May 1, 1995 Page 3 It is intended that you and the Company will enter into a more formal employment agreement as soon as possible, which will incorporate the terms of this letter and such other terms and provisions as are appropriate for contracts of this nature and are approved by the Board or its authorized desig- nees. If the foregoing correctly expresses our agreement, please so indicate by signing the enclosed copy of this letter in the space provided below and returning it to the Company. W. R. GRACE & CO. By:/s/ Thomas A. Holmes Thomas A. Holmes AGREED AND ACCEPTED: /s/ Albert J. Costello Albert J. Costello