was founded in 2000, by five geoengineering and geoscience practitioners with more than three decades of experience as an integrated team. The staff has grown to include about 20 engineers, geologists, geophysicists, and hydrogeologists. GeoPentech’s extensive experience includes hundreds of successful engineering projects, from small efforts to large-scale civil engineering work.

GeoPentech moved from our original facility in Santa Ana to a new base in Irvine, California, in 2016. GeoPentech’s services extend to clients in California, throughout the United States and overseas.

In May 2018, we were all saddened by the sudden passing of our partner, co-worker and good friend, Sarkis Tatusian. As president, Sarkis has been a part of our family here at GeoPentech since the beginning more than 18 years ago. A well-respected professional, a passionate engineer, a great mentor, and a good friend, Sarkis was a key reason for the success of our firm and will be dearly missed.

Our Mission

GeoPentech’s expertise in geoengineering and geosciences leads to innovative solutions for our clients’ earth-related problems. We provide value by diagnosing the unique geo-related problems before developing an appropriate response.

Our solutions are designed to be cost-effective and reflect our client’s non-technical constraints. GeoPentech aids clients by focusing on our integrated specialty geo-practices and can respond in a fast-track environment when necessary.

GeoPentech also recognizes the importance of our employees’ personal and professional goals. We have built a successful operation and an enjoyable working environment by emphasizing collaboration and the innovative and creative use of technology.


GeoPentech’s facilities experience includes:

  • Dams and Reservoirs
  • Tunnels
  • Pipelines and distribution systems
  • Power Plants
  • Commercial Developments
  • Mid- and High-Rise Buildings
  • Land Developments
  • Hospitals, Schools & Government facilities
  • Earth retaining structures
  • Port and Offshore facilities
  • Roadways and bridges
  • Groundwater Basins and Wells

Organization and entities served include:

  • Federal, state, and local governments
  • Utilities and water agencies
  • Schools and Universities
  • Developers
  • Architects and Engineers
  • Contractors
  • Law firms