About People

Mark Wieners

Mark Wieners, RG

Senior Geologist

Mark serves as a Project Manager in the Saint Louis office’s Environmental Group. His duties include overseeing and performing a variety of geologic and environmental investigations. He specializes in Phase I and II Environmental Site Assessments; environmental site characterizations and risk assessments; asbestos building inspections; lead-based paint inspections; geophysical studies; construction materials testing; and geotechnical studies.

Mark has assisted with projects nationwide for Shannon & Wilson. He has completed the OSHA-required 40-hour health and safety training course for work on hazardous waste sites and participates in Shannon & Wilson's Health and Safety Plan Medical Surveillance Program. Mark is also on the Board of Directors of the Air & Waste Management Association of the Greater St. Louis Section.


  • BS, Geology, Saint Louis University, 2004
  • BA, Environmental Science, Saint Louis University, 2004


  • Registered Geologist: Missouri


  • Association of General Contractors
  • Association of Engineering Geologists
  • Air & Waste Management Association
  • Society of American Military Engineers
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