American Cyanamid Co. (1963-66)

Lawrence Berkeley Labs (1977-80)

Hazleton-Nuclear Sciences Corp.(1964-66)

Rocky Mountain Energy Co. (1977)

Teledyne Isotopes, Inc. (1966-1971)

Lawrence Livermore Labs (1978-79)

Martin-Marietta Corp. (1966-67)

McCall-Nicholas, Inc. (1969-77)

American Cement Co. (1967-69)

Pincock, Allen & Holt, Inc. (1978-80)

Riverside Cement Co. (1969-70)

Rockwell-Hanford Operations (1979)

Dukco Mining Co. (1970-71)

Cypress Mines, Inc. (1979)

U.S. Geological Survey (1971-74) WAE

Steffen, Robertson & Kirsten, Inc. (80-82)

Mobile Premix Co. (1972-76)

Inspiration Consolidated Copper (81-83)

Woodward-Clyde Consultants73-78,90-92

Conoco, Inc. (1981)

Amoco Production Co. (1973-74)

Eastman, Stichter, Bergman & Smith81-86

Fugro, Inc. (1974)

Science Applications Int’l Corp. (1986-92, 1992-97)

Tippetts, Abbet, McCarthy& Stratton,1974

City of Mont Belvieu, TX, (1988-97)

Grant, McHendrie, Haines & Crouse 75-76

Hydro-Geo Consultants (1995-98)

Dames & Moore, Inc. (1975-77)

Battle Mt. Gold Co. (1995-98)

Law-Engineering Testing Co. (1975-76)

Grosvenor Engineering Co. (1996-98)

Climax Molybdenum Corp. (1975-83)

URS Corp. (2000)

Amax, Inc. (1990-92)

Duncan, Ostrander & Dingess, Inc. (1998)

Corps of Engineers, U.S. Army (1976-77)

Fracflow Consultants, Inc. ((1997)

Homestake Mining Co. (1976-80)

Airpark Village, LLC (2000-present)

Wyoming Minerals Corp. (1976)