Group: Management Committee

Martin Geller is the Founder and Chairman of Geller & Company, a firm that provides business owners, general partners, non-profits, and other institutions with strategic business, operational and financial advisory services. Geller & Company helps clients decide on their goals and objectives and ensure they are successfully implemented. Since Geller & Company’s founding in 1984,…

Diane is a Partner at Geller & Company and Head of G Client Services. She is primarily responsible for oversight of the firm’s largest client and the client’s multiple entities in the philanthropic and investment areas. Diane has over thirty years of experience working with the personal financial needs of high-net-worth individuals, including CFO services,…

Hayden serves as Partner and Managing Director at Geller. Currently, Hayden co-leads a team serving the personal and philanthropic needs of the firm’s largest client. He was formerly the Chief Executive Officer and Chief Operating Officer for Geller Advisors, the firm’s Registered Investment Advisor that sold to Corient Private Wealth in January 2025. In his…

Barbara serves as Partner and Managing Director at Geller. Currently, Barbara co-leads a team serving the investment and philanthropic needs of the firm’s largest client. In addition, she also oversees the internal Data, Reporting, and Systems (DRS) team providing consistent and optimized processes, improved decision-making capabilities and increased operating efficiency through standardization of systems, processes…

Fiona is the Managing Director of Philanthropic Services where she advises individual, family, non-profit and corporate clients.  Fiona leads a team of professionals who provide customized, multidisciplinary business solutions to achieve her clients’ complex goals. Prior to joining Geller & Company, Fiona was a management consultant advising global clients on a wide range of strategic,…

Frank serves as the Head of Special Projects at Geller. Frank has 20 years of experience in finance and accounting, specializing in research, business strategy, strategic planning, mergers and acquisitions, and venture investing. In his role, Frank provides bespoke research and analysis for clients in support of their business operations and strategic goals. He also…

Martin Braunstein serves as Managing Director, Head of Strategic Treasury at Geller. Martin’s responsibilities include managing capital markets activities for the firm’s largest client and providing oversight of Geller’s corporate finance function. He brings over 40 years of capital markets, structured finance, and bank relationship management experience to his role. In addition to his current…

Erin serves as Head of Human Capital at Geller. She is an accomplished human resources executive with over 20 years of progressive experience spanning various industries, including technology, hospitality, brand management, and financial services. With a proven track record of driving organizational success through strategic HR initiatives, Erin brings a wealth of expertise to Geller’s…

Neil serves as Managing Director, Head of Information Technology and Security at Geller, where he’s responsible for overseeing the Information Technology and Information Security teams and programs. He brings over 25 years of experience in information technology and infrastructure. Prior to his time at Geller, Neil served as Director of Technology Infrastructure, Security, and Compliance…

Lauren Rutkin serves as the Director of Strategic Initiatives and Philanthropy at Geller and, for the past 21 years, as the Director of the Geller Family Foundation. Bringing over thirty years of experience, she manages the personal interests of the Geller family in matters of charitable giving, engaging the next generation, board relationships, special projects…