SASSAN Geosciences

Geotechnical engineering services

About Us

SASSAN Geosciences, Inc. (SAS) provides innovative geotechnical solutions for challenging sites through detailed geological investigation, creative engineering design, and cost-effective construction of remedial measures. Our projects range from residential, commercial, and public properties, to countless special structures with difficult sitting problems.

Backhoe excavation

Industry Leaders

With over 35 years of experience, we pride ourselves on creating innovative solutions to complex problems and providing accurate yet rapid results at a fair and competitive cost.

Our testing laboratory is complete with state-of-the-art equipment for the sampling and analysis of soils, concrete, and masonry.

Sassan Salehipour headshot

Sassan Salehipour

President & CEO

For over thirty-five years, Sassan has specialized in geotechnical, civil, and structural engineering, specifically known as the foremost expert on landslide prevention/repair and slope stability in Los Angeles county and neighboring regions. With projects ranging from small residential to large commercial endeavors and a deep background in foundation design, field planning, subsurface exploration, data analysis, and preparation of technical reports, Sassan takes pride in delivering top quality work for his clients at a competitive price. In addition to his engineering work, Sassan is one of the most sought-after expert witnesses in his field.

Sassan completed coursework for his Ph.D. in Geotechnical Engineering from the Univeristy of Rhode Island in 1984. He received his M.S. in Structural Engineering from Syracuse University in 1981 and prior to that received his B.S. in Civil Engineering from Tehran University in 1979. He is a registered Geotechnical and Civil Engineer in the state of California as well as a registered Grading Deputy Inspector in the City of Los Angeles. He is a proud member of the California Geotechnical Engineers Association, American Society of Civil Engineers, American Association for the Advancement of Science, International Society of Soil Mechanics and Foundation Engineers, and Structural Engineers Association of Southern California.

Zak Salehipour

Project Manager / Deputy Grading Inspector / Realtor

Zak brings a well-rounded background and sharp attention to detail to both his real estate and geotechnical work. With over three years of experience managing geotechnical projects at Sassan Geosciences, Zak has developed strong expertise in coordinating field operations, reviewing reports, and inspecting job sites to ensure proper construction of deep and shallow foundations, retaining walls, and other critical earthwork in compliance with engineering recommendations. He holds a bachelor’s degree in Business Administration from the University of Southern California and is currently pursuing a master’s degree in Engineering Geology to further strengthen his expertise in the field.

Prior to joining the family business, Zak spent a decade working in development and production in the entertainment industry — a career that honed his communication, negotiation, and project management skills. Now a licensed California real estate agent (DRE #02215769), Zak combines his technical insight with market knowledge to help clients navigate real estate transactions with confidence. He specializes in guiding sellers and buyers through land and hillside property sales, and is currently offering exclusive promotions for clients who use him as their agent. Click here to learn more about his current real estate offers.

Our Services

  • Geology, grading, foundation, compaction, and deputy inspections

  • Grading, LID, drainage, shoring, rebar verification, and erosion control plans

  • Expert testimony in court to help your case

  • Buying a new property and concerned about the slope stability? Contact us for help during your escrow period.

Our Project Locations

Note: Some pins may not be accurate to the exact point, but rather represent a general vicinity where work was performed. The scope of work performed at each location differs, please contact us if you wish to know our involvement.