About People

Matt Grizzell

Matt Grizzell, PG

Senior Engineering Geologist

Matt Grizzell is a Senior Engineering Geologist with more than 15 years of experience as a consultant in the fields of geotechnical and environmental engineering and 14 years at Shannon & Wilson. Matt has also worked as a mapping field geologist in the public sector.  He has recently performed geotechnical engineering analyses to design of tunnel stability improvements, rock and soil slope stability improvements, and foundations for water conveyances, rail, and highway facilities.  Matt has also provided emergency response efforts for landslide, rockfall, and subsidence events affecting highway, rail, and pipeline facilities.  He has recently completed several tunnel condition assessment projects in facilities ranging from 30-inch-diameter concrete water conveyance pipelines to openings over 50 feet high.  Matt has completed geologic hazard assessment studies along water pipelines and transportation corridors to evaluate and prioritize hazards, develop mitigation strategies, and estimate construction costs.  He has also assisted in forensic investigations at distressed facilities, including railroad facilities, commercial structures, and residential structures.


  • BS, Geology, Colorado State University, 2002
  • MS, Civil Engineering, University of California, Berkeley, 2015


  • Registered Geologist, Washington, Arizona 
  • Professional Geologist, Colorado
  • Engineer-in-Training, Washington 
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