Skip to content
Geometric Decoration
Headshot of woman, Catherine Regan

Catherine Regan, P.E.

Technical Expert

Catherine is a sought-after technical expert with more than two decades of experience in environmental consulting and engineering. She enjoys partnering with clients on challenging projects and has deep experience in many areas including site investigations; stakeholder engagement; data visualization and interpretation; and remediation system design, permitting, construction, operations, and maintenance.

Catherine is an active member of the Interstate Technology and Regulatory Council and has provided leadership as a classroom instructor and developer of its petroleum vapor intrusion guidance and vapor mitigation documents. As a vapor intrusion technical expert, her depth and breadth of experience and credibility with regulators afford her insights not readily available to others. As a result, she is often engaged to provide high-level strategic support on complex residential, commercial, and industrial vapor intrusion investigation and mitigation projects around the world.

  • Checkmark Bioremediation/in situ chemical oxidation technology
  • Checkmark Data visualization and interpretation
  • Checkmark Portfolio management
  • Checkmark Remediation system design, permitting, construction, operations, and maintenance
  • Checkmark Soil, groundwater, stormwater, and sediment investigations and risk assessment
  • Checkmark Sub-slab depressurization system design and implementation
  • Checkmark Steam injection system installation and monitoring
  • Checkmark Soil vapor extraction/air sparge system installation and monitoring
  • Checkmark Vapor intrusion investigations

“I enjoy advocating for my clients to help them implement remedial strategies focused on site closure. I love the fact that what we do every day has a tangible impact on our world, in both big and small ways. And I am inspired by how our industry at large is shaping a more sustainable and climate-resilient future.”