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Marissa Venn, MPH, MA

J.S. Held Releases Insights on Risks & Opportunities Expected to Impact Organizations in 2025

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Marissa Venn has experience in various project settings, providing litigation support for testifying experts and planning and conducting environmental monitoring to assess chemical exposures in workplaces and communities.

In 2024, she drafted a Tribal Hazard Mitigation Plan for the Federated Indians of Graton Rancheria, which was submitted to FEMA for future grant eligibility. In two separate internships, she assisted with analyzing and evaluating 211 San Diego’s Homeless Emergency Aid Program. During the COVID-19 pandemic, she led a task force of volunteers to assist small businesses with state and local compliance. Her graduate thesis work included an analysis of transboundary pollution mitigation projects on the Tijuana River at the US-Mexico border with a focus on regulatory issues.

At J.S. Held, Ms. Venn supports toxicologists, industrial hygienists, and health scientists through literature, project material, data summaries, plan development, and report writing. She also conducts extensive literature reviews and data analysis.

Key Expertise

  • Toxicology
  • Industrial Hygiene
  • Risk Assessments
  • Exposure Assessments
  • Environmental Health Consulting
  • Regulatory Compliance
  • Environmental Justice & Equity
  • Risk Communication
  • Chemical Registration
  • Environmental Investigations
  • Environmental Risk Management
  • Epidemiology Consulting
  • Litigation Support
  • PFAS Assessment & Remediation
  • Product Stewardship
  • Regulatory Compliance Consulting
  • PCB Assessment & Remediation
  • Health Risk Management

Professional Affiliations/Memberships/Licenses/Training

  • Society for Risk Analysis
  • 40-Hour Hazardous Waste Operations and Emergency Response (HAZWOPER) Certification
  • 8-Hour HAZWOPER Supervisor
  • Federal Emergency Management System, Incident Command System (ICS) 100, 200

J.S. Held is recognized as an ENR Top 200 Environmental Consulting Firm and industry leader in the Verdantix Green Quadrant for Sustainability & ESG Consulting.