Susan B. Welt, M.P.H., P.E.

Susan Welt is a Principal Engineer based in Massachusetts with more than 20 years of experience focused on the investigation and remediation of industrial sites, mining operations, and U.S. Department of Defense facilities. Clients rely on Susan's team leadership, strategic planning, and regulatory negotiation to help resolve their soil, groundwater, sediment, and vapor intrusion (VI) challenges.

Susan Welt is a Principal Engineer based in Massachusetts with more than 20 years of experience focused on the investigation and remediation of industrial sites, mining operations, and U.S. Department of Defense facilities. Clients rely on Susan's team leadership, strategic planning, and regulatory negotiation to help resolve their soil, groundwater, sediment, and vapor intrusion (VI) challenges.


Susan advises her clients on the risk-based management of contaminated media. By using a multiple-lines-of-evidence approach, she has developed remediation action levels and remedial strategies that are protective of public health and the environment; including, but not limited to applicable soil remediation levels that limit the need for excavation and deed restrictions, groundwater clean-up levels based on minimizing the VI exposure pathway, and brownfield redevelopment plans for current and future residential and commercial building use scenarios.

An experienced leader, Susan’s passion for career development helps her colleagues find their strengths and make choices that build outstanding careers. Skilled at listening, she advises her colleagues regarding difficulties and opportunities in technical work, managing projects, supervising people, and the key importance of mentoring. Her strong teams partner with clients to develop exceptional solutions.

Susan has evaluated and mitigated VI impacts at hundreds of major industrial, commercial, and residential sites throughout the United States and Europe. She previously served as a VI expert with the New York State Department of Health and is a former member of the VI technical team for the Interstate Technology and Regulatory Council (ITRC). In this role, she was a contributor to the ITRC's current VI guidance.

A fellow in the Environmental Public Health Leadership Institute at the U.S. Centers for Disease Control and Prevention, Susan is also a member of the National Society of Professional Engineers, the Association for Environmental Health and Sciences, and the National Air and Waste Management Association.

To advance the state of the practice, Susan is a frequent presenter at industry conferences and symposia. She is the author or co-author of numerous papers on VI sampling, assessment, and mitigation techniques; the risk-based management of contaminated sediments; and the in situ remediation of contaminated sediments and soils.

Contact Susan Welt at This email address is being protected from spambots. You need JavaScript enabled to view it. or +1-978-206-5776.

Career Summary of Susan B. Welt, M.P.H., P.E.

  • Specialties: Contaminated Media Investigations and Assessments; Risk Communication; Strategic Planning; Subsurface Vapor Intrusion Modeling and Assessments; Subsurface Vapor Mitigation System Design and Implementation; Environmental Health and Safety; Brownfield Sites; Leadership; Career Planning
  • Practice Areas: Contaminated Site Assessment and Cleanup, Environmental Management
  • Disciplines: Environmental Engineering, Public Health
  • Education: M.P.H., Environmental Health, University of Rochester, 2001; M.S., Agricultural and Biological Engineering, Cornell University, 1999; B.S., Agricultural and Biological Engineering, Geological Engineering, Cornell University, 1998
  • Registration: New York Professional Engineer, 084913

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