John Iacobellis

John Iacobellis is a Principal in BDO’s Financial Services Group and serves as the New York Market Leader for Assurance. He has more than 25 years of experience in the financial services industry, with a primary focus on providing assurance services to broker dealers, investment partnerships and digital assets.

John brings deep industry knowledge across a broad range of brokerage activities, including retail, institutional, and prime brokerage; correspondent clearing; market making; proprietary trading; and investment banking, as well as compliance with SEC, CFTC, and FINRA requirements. He works closely with clients and engagement teams to address evolving regulatory expectations, emerging risks, and complex accounting and reporting matters.

Prior to joining BDO, John spent four years at the Public Company Accounting Oversight Board (PCAOB), where he contributed to the development and implementation of the broker dealer inspection program. Earlier in his career, he spent nine years with a Big Four firm in its Financial Services Group, serving broker dealers and investment partnerships. This experience provides him with a regulator informed perspective on audit quality, risk assessment, and compliance.

John is actively involved in professional education and training, regularly supporting internal and external programs focused on broker dealer audits, regulatory developments, and industry trends. He is deeply engaged in the brokerage industry and committed to advancing audit quality through collaboration and knowledge sharing.

He is an active member of several professional and industry organizations, including the American Institute of Certified Public Accountants (AICPA), where he served on the AICPA Stock Brokerage and Investment Banking Expert Panel (2017-2022). John is also a Board Member of the New York State Society of Certified Public Accountants (NYSSCPA) and serves on the NYSSCPA Stock Brokerage Committee, where he was the chairperson (2021-2023). In addition, he participates with the Center for Audit Quality serving on the Broker Dealer Task Force.