Exhibit 10.18 AMENDMENT TO RETENTION AGREEMENT Pursuant to this Amendment, effective July 9, 1999, the Retention Agreement between Gregory A. Thornton (you) and Harding Lawson Associates Group Inc. is amended as follows: It is agreed that the...Retention Agreement • August 6th, 1999 • Harding Lawson Associates Group Inc • Hazardous waste management
Contract Type FiledAugust 6th, 1999 Company IndustryPursuant to this Amendment, effective July 9, 1999, the Retention Agreement between Gregory A. Thornton (you) and Harding Lawson Associates Group Inc. is amended as follows:
Exhibit 10.17 AMENDMENT TO RETENTION AGREEMENT Pursuant to this Amendment, effective July 9, 1999, the Retention Agreement between Arthur C. Riese (you) and Harding Lawson Associates Group Inc. is amended as follows: It is agreed that the Corporate...Retention Agreement • August 6th, 1999 • Harding Lawson Associates Group Inc • Hazardous waste management
Contract Type FiledAugust 6th, 1999 Company IndustryPursuant to this Amendment, effective July 9, 1999, the Retention Agreement between Arthur C. Riese (you) and Harding Lawson Associates Group Inc. is amended as follows:
Exhibit 10.16 AMENDMENT TO RETENTION AGREEMENT Pursuant to this Amendment, effective July 9, 1999, the Retention Agreement between Claude Corvino (you) and Harding Lawson Associates Group Inc. is amended as follows: It is agreed that the Corporate...Retention Agreement • August 6th, 1999 • Harding Lawson Associates Group Inc • Hazardous waste management
Contract Type FiledAugust 6th, 1999 Company IndustryPursuant to this Amendment, effective July 9, 1999, the Retention Agreement between Claude Corvino (you) and Harding Lawson Associates Group Inc. is amended as follows: