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Sonora
(800) 800-0490
(209) 532-0361
21663 Brian Ln.
Sonora, CA 95370
Stockton
(209) 234-0518
188 Frank West Cir. Suite I
Stockton, CA 95206
Merced
(209) 388-9601
1735 Ashby Rd. Suite D
Merced, CA 95348
Jamestown
(209) 984-4593
17857 High School Rd.
Jamestown, CA 95327
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Associate Geologist, Alexander Dewitt, PG
Business Development Specialist, Marketing
Engineering Services Manager, Anthony Mazzei, PE
Executive Administrative Assistant, Sue Gray
GIS Programmer / Analyst, James Montgomery
GSA Contract Administrator, Kim Reed
IT Manager, David Harden
Licensed Land Surveyor, Erik Ohlson, LS
Merced Division Manager, Lee Morse, PG
President, Barry Hillman, PhD
Principal Civil and Geotechnical Engineer, Ron Skaggs, PE, GE
Principal Engineering Geologist, Scott Lewis, CEG
Registered Geotechnical Engineer, John Dailey, PE, GE
Senior Geologist, Marc Crum, CEG
Senior Geotechnical Engineer, Andrew S. Kositsky, PE, GE
Senior Hydrogeologist, John Kramer, PhD
Staff Geologist, Casey Kipf
Vice President, Consulting Services, Robert Job, PE
Webmaster, Richard Call, MCITP
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