Our Leadership Team
Dedication to serving our policyholders starts at the top.
We strive to set standards of excellence for our entire organization.
Phil Gass
Chairman & Chief Executive Officer
Phil is a co-founder of Nassau and serves as chairman and chief executive officer. Learn more.
Jacqueline Merl Bamman
Chief People Officer
Jackie is responsible for leading Nassau's human capital strategy, focusing on initiatives that drive growth, innovation, culture, and the development and advancement of our employees. Learn more.
Thomas M. Buckingham, FSA, MAAA
Chief Growth Officer
Tom is responsible for developing and executing Nassau’s sales strategy for its insurance business, including all product development, distribution channels, marketing, branding, and leveraging digital tools to enable quick, easy and simple sales. Learn more.
Kostas Cheliotis
General Counsel & COO
Kostas, also known as Gus, is a co-founder of Nassau and is responsible for legal affairs, strategy and corporate functions. Learn more.
David E. Czerniecki, CFA
Chief Investment Officer
David leads Nassau Asset Management and is responsible for managing Nassau’s insurance portfolios including establishing portfolio strategy, managing asset allocation, and delivering investment performance across all of Nassau's investment categories. Learn more.
Michael A. Donovan, FSA, MAAA
Chief Actuary
Mike leads Nassau's Actuarial team with responsibility for valuation, product management, modeling, data analytics, corporate actuarial, M&A and other strategic initiatives. 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 leads Nassau's communications and community engagement functions. Learn more.
Jordan Price, CPA
Chief Financial Officer
Jordan is responsible for Nassau’s global finance and corporate development functions, including financial planning, accounting and financial reporting, capital management, treasury, corporate audit, M&A, and other strategic, financial, and operational initiatives. Learn more.
Vernon Young
Chief Risk Officer
Vernon is responsible for overall leadership and direction for enterprise risk management. Learn more.
Susan Zophy
Chief Service Officer
Sue is responsible for Nassau's Operations, encompassing all facets of service and policy administration including producer contracting, suitability, new business, in force management, post issue processing, claims and the customer service call center. Learn more.