Sellick, Stephen E

Stephen E. Sellick is an experienced consultant specializing in the management of complex quantitative analysis in litigation matters, particularly projects in environmental, mass tort and product liability claims.

Mr. Sellick founded Gnarus in 2007 and was its Managing Director from 2007 until Gnarus was acquired by Nathan Associates in 2017.  At Nathan, Mr. Sellick served as Senior Vice President and member of the Board of Directors; Mr. Sellick worked to combine team of experts from Gnarus and Nathan’s Litigation practice and was the senior executive for Nathan’s Litigation business. Mr. Sellick joined the re-launched independent Gnarus in February 2022 as its Board Chairman.

As Gnarus’ Chairman, Mr. Sellick works with Gnarus executives and its Board to determine the overall direction and strategy of the company consistent with our team’s vision and values. For clients, Mr. Sellick evaluates claims in insurance allocation, internal management, cost allocation, cost recovery and litigation risk analysis. He also participates in studies involving regulatory economics, cost accounting and financial analysis of the electric utility industry. He works with clients in insurance, consumer manufacturing, electronics, aerospace, natural gas, pharmaceuticals, electric utility, and agricultural products industries.

Mr. Sellick’s practice extends to work in board ESG oversight and risk management; in this space he is focused on assisting for-profit, social enterprises, and nonprofits with risk management of environmental & mass tort contingent liabilities; governance & board structure via board assessments & board skills matrix reviews; and board formation & best practices.

Mr. Sellick is active in the San Francisco chapter of the Private Directors Association and the Alumni Council of the Harris School of Public Policy Studies at the University of Chicago. He is a member of the Academy of Court-Appointed Neutrals, and is recognized by Who’s Who Legal as a recommended expert in Insurance & Reinsurance Expert Witnesses.

Mr. Sellick holds an M.A. in Public Policy Studies from the University of Chicago and a B.S. in Economics from the Wharton School at the University of Pennsylvania.

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