Mark Giamo

Mark serves is the National Financial Accounting and Advisory Services Managing Principal, overseeing a range of specialty practices including Third Party Attestation, Risk Advisory, Outsourced Finance and Accounting, Accounting Advisory, and Technology Risk Assurance. In this role, a significant amount of his time is spent on the operational and strategic aspects of people, quality, and growth. 

Mark was elected to BDO’s Board of Directors in 2025. 

Since joining the firm nearly 20 years ago, he has served in a variety of positions including Lead Engagement Principal, Managing Principal, New York Metro Assurance Market, Managing Principal, New York Metro Financial Services Practice, Managing Principal, New Jersey Office, and Client Service Principal in the New York Metro and Southern California Practices.

Throughout his tenure, Mark has supported a wide range of public, private, multinational, and private equity-backed clients across industries such as life sciences, software and Software as a Service, telecommunications, manufacturing, distribution, and technology. He also has deep experience in Securities and Exchanges Commission registrants, international operations, mergers and acquisitions, equity raises, and complex revenue recognition.