Mark Ellenbogen

Mark Ellenbogen is BDO’s Chief Operating Officer (COO). As COO, Mark oversees every aspect of the firm’s business and as a member of the firm’s Executive management team he works closely with other members to develop strategy and set the direction for the firm’s future sustainability, growth and profitability.

Mark executes the firm’s mergers & acquisitions (M&A) strategy, including analysis and recommendations for the establishment of new offices and practice expansion, applying his extensive experience and knowledge to form new ideas, concepts and methods to help drive the firm forward.

Mark is responsible for overseeing many of the firm’s operational business units, including Finance, IT, the Alliance program and Administrative Operations. He also directs the development and implementation of the firm’s national strategies and initiatives related to innovation and industry group programs. In addition, Mark oversees the firm’s international liaison program to ensure close collaboration with the BDO global network and participates on the network’s Global Board Advisory Council.

Mark has over 30 years of public accounting experience working with clients in various industries including biotechnology, telecommunications, media, manufacturing, non-profit, education, publishing, software and technology, and professional services. Mark has consulted with clients on a variety of accounting and operational issues, including mergers and acquisitions. He has extensive experience with due diligence, opening balance sheet audits and purchase price allocations. Mark has also conducted training for both financial and non-financial audiences on a variety of audit and accounting issues.

Mark previously led BDO Bethesda’s Assurance practice and, following its 2015 combination with BDO McLean, was named office managing partner of the BDO Greater Washington D.C. Assurance practice. In 2016, he was named Atlantic Assurance regional managing partner. He also served as the Public Sector practice national leader, the Assistant Regional Technical Director for the firm’s Mid-Atlantic region and was a BDO board member, chairing its Governance Committee and has been part of the BDO Board of directors nominating committee six times, serving as chair twice.