Matthew Lesh

Principal Geologist



Matthew Lesh has over 20 years of experience in the environmental field ranging from initial project planning and assessment to remediation and site redevelopment. In addition to performing Phase I Environmental Site Assessments for hundreds of properties, he has managed projects with contaminated soil, groundwater, and soil vapor for industrial, commercial and residential clients. He has conducted technical environmental, geotechnical, and hydrogeologic investigations and provided remediation planning and oversight. Matthew has managed various chlorinated solvent and petroleum hydrocarbon release sites throughout California and overseen field operations for multiple large soil and groundwater remediation projects. He has also performed comprehensive Environmental, Health, and Safety assessments of industrial manufacturing companies throughout North America for private equity clients and conducted environmental assessments of large tracts of privately held timberland as part of pre-acquisition or pre-sale due diligence activities.

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  • Professional Geologist (PG), California

    License No. #9123

  • Registered Geologist (RG), Oregon

    License No. #G2458