Our Leadership Team

Dedication to serving our policyholders starts at the top.
We strive to set standards of excellence for our entire organization.

Phillip J. Gass
Chief Executive Officer

Phil is a co-founder of Nassau Re and serves as chairman and chief executive officer. Learn more.

Kostas Cheliotis
General Counsel & COO

Kostas, also known as Gus, is a co-founder of Nassau Re and is responsible for legal affairs, strategy and corporate functions. Learn more.

Thomas M. Buckingham, MBA, FSA
Chief Product & Service Officer

Tom is responsible for all insurance product development, marketing and service-related functions. Learn more.

Edward W. Cassidy
Managing Principal of Saybrus Partners

Ed is managing principal of Saybrus Partners, Inc., Nassau Re's distribution company and has over 25 years of industry and sales management experience. Learn more.

Diane R. Ellsworth
Chief of Staff

Diane is responsible for ensuring strategic initiatives are on track, working with the executive team and all business and staff areas, and coordinates communications with key stakeholders. Learn more.

Robert J. Lombardi, FSA
Chief Actuary, Insurance

Bob is chief actuary of Nassau Re's insurance segment. He is responsible for managing actuarial risks and evaluating capital strategies. Learn more.

Graham W. G. Mackay
Chief Operating Officer, Reinsurance

Graham is responsible for underwriting and management of Nassau Re’s reinsurance transactions and for the day-to-day operations of Nassau Re’s offshore affiliates. Learn more.

Richard Daniel McCoach
Chief Information Officer

Dan is responsible for all technology and related operations in the enterprise. Learn more.

Justin K. Mosbo
Chief Actuary & Chief Pricing Officer

Justin is responsible for all actuarial functions of Nassau Re along with all M&A transactions across insurance/reinsurance, asset management and distribution. Learn more.

Christopher M. Wilkos, CFA
Chief Investment Officer

Chris is responsible for setting investment strategy to ensure that Nassau Re fulfills its obligations to customers. He oversees Nassau Re's life insurance companies' general account and affiliated investment portfolios.
Learn more.

Thomas A. Williams
Chief Financial Officer

Tom is responsible for providing oversight and leadership for the global finance function and serves as a board member of several Nassau Re subsidiaries. Learn more.

Vernon Young
Chief Risk Officer

Vernon is responsible for overall leadership and direction for enterprise risk management. Learn more.