Key Personnel

SGS personnel are reputable professionals crosstrained in geology, geotechnical and materials engineering and committed to building trust with our clientelle and providing reliable services in conformance with safety, timeliness, and compliance with project specifications.

Joseph A. Adler

Joe Adler
Joe Adler

(Owner/President/Principal Engineering Geologist)

  • California Professional Geologist No. 7017
  • California Certified Engineering Geologist No. 2198
  • Arizona Registered Geologist No. 37097
  • Association of Engineering Geologists No. 6435
  • M.S. San Diego State University, 2003
  • B.A. University of California, San Diego, 1989
  • Nuclear Gauge Safety Training & Operation

Mr. Adler has experience in engineering geology specializing in hillside mass grading and improvement projects including: single and multi-family residential, commercial sites, public school sites, municipal roadways, reservoir sites, soil nail walls, and fault and landslide hazard studies. In addition, his work includes extensive post-construction slope stability and landslide investigations for distressed residential and commercial structures in Southern California and Nevada.

Dean Dougherty

Dean Dougherty
Dean Dougherty

(Owner/Vice President/Principal Environmental Geologist)

  • California Professional Geologist No. 6497
  • Assessment of Vapor Intrusion for Real Estate Transactions, ASTM International
  • Environmental Site Assessments for Commercial Real Estate, ASTM International
  • Environmental Site Assessments: Phase 1 and Phase 2, ASTM International
  • Excavation Safety, OSHA 10-Hour Course
  • Hydrogeology, California State University, Los Angeles
  • ACI Concrete Field Testing Technician – Grade 1
  • Nuclear Gauge Safety Training & Operation
  • Radiation Safety Officer Training
  • Seismic Hazard Analysis, AEG Short Course
  • B.S., Geology, University of Southern California, Los Angeles, 1987

Mr. Dougherty has experience in environmental and engineering geology, hillside grading and improvement projects, inspection and testing during school and hospital construction, materials testing laboratory management, Quality System Management, fault and landslide hazard studies, Phase I and II Environmental Site Assessments, groundwater investigations, well construction design and inspection, and minerals exploration.

Thomas A. Platz

(Owner/Chief Financial Officer/Principal Engineer)

  • California Professional Engineer No. C41039
  • Nevada Professional Engineer No. 8288
  • A.S.C.E., Advanced Integrated Wastewater Pond System Design
  • University of Wisconsin, Small Community Wastewater Treatment Design
  • University of Wisconsin, Water System Analysis Distribution
  • B.S., Civil Engineering, Cal State University Northridge
  • Nuclear Gauge Safety Training & Operation

Mr. Platz has experience in soils engineering specializing in foundation design, investigations for new residential and commercial developments, with a specialization in slope stability and waste water treatment facilities. In addition, his work includes extensive engineering analysis and support for military projects, cellular communication networks, schools, hospitals, and golf courses.