CORPORATE OFFICERS

Li-San Hwang
Chairman

Albert E. Smith
Vice Chairman

Dan L. Batrack
Chief Executive Officer
and Chief Operating Officer

Sam W. Box
President

David W. King
Executive Vice President,
Chief Financial Officer
and Treasurer

Richard A. Lemmon
Senior Vice President,
Corporate Administration

Mark A. Walsh
Senior Vice President and
President of the Government Compliance
Services Group

William R. Brownlie
Senior Vice President and
President of the Environmental
Engineering and Consulting Group

Donald I. Rogers, Jr.
Senior Vice President and
President of the Remediation
and Construction Group

Douglas G. Smith
Senior Vice President and
President of the Infrastructure Group

Patrick D. Haun
Senior Vice President and
President of the Systems Support
and Security Group

Craig L. Christensen
Vice President, Finance and
Enterprise Systems

Janis B. Salin
Vice President, General Counsel
and Secretary

Steven M. Burdick
Vice President, Corporate Controller

Michael A. Bieber
Vice President, Business and
Corporate Development