Contaminated Site Assessment and Cleanup; Environmental Management; Waste Management; Facility Hazards; Environmental, Social, and Governance

BS, Chemical Engineering, Washington University in St. Louis, 2010

Professional Engineer: Massachusetts #51837

Known for his ability to help structure deals that minimize exposure and maximize value, Shamus is a strategic partner to legal counsel, private equity investors, and corporate clients, providing expert guidance on environmental risk management in transactions, mergers, acquisitions, and legacy site management.

His work spans remediation of legacy contamination sites, redevelopment of impacted properties, financial forecasting for environmental liabilities, and third-party claims for cost allocation. His technical background encompasses many contamination types, risk vectors, and regulatory regimes, including under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), the Resource Conservation and Recovery Act (RCRA), and state-specific frameworks. Using this wide-ranging experience, he offers clients comprehensive support for complex legal and business matters.

Shamus excels at identifying and prioritizing critical risk drivers within each project’s context. He leads multidisciplinary teams of subject matter experts and sequences workflows to drive successful outcomes and avoid delays from less consequential elements. His proficiency in developing conceptual site models, remedial strategies, and cost estimates translates into actionable, business-focused solutions for clients. Shamus is adept at structuring and implementing risk-mitigation measures tailored to each project’s setting and magnitude of risk. These measures include special indemnities, escrow holdbacks for environmental matters, and insurance solutions, tools that are especially valued in fast-paced transactions and portfolio management. He brings this same practical philosophy to managing legacy contamination sites, collaborating with colleagues firm-wide to employ Geosyntec’s innovative remedial solutions to efficiently achieve regulatory closure while protecting human health and the environment.

Clients value Shamus’s responsiveness, confidentiality, and proactive communication, as well as his ability to integrate emerging regulatory trends into his advisory services. His strategic insight and commitment to client success have made him a trusted resource for legal teams, private equity firms, and corporations navigating complex environmental challenges.

Contact Shamus at shamus.keohane@Geosyntec.com.

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