About John

John (Jay) E. DeVan, III is a senior advisor in Marcum’s Tax & Business Services group, with extensive experience working with clients in the real estate and professional services industries.

He specializes in tax planning and compliance for high-net-worth clients and complex individual, partnership, S-corporation, and trust returns. His experience also includes leading audits of commercial banks and federal credit unions.

Jay was previously a partner at a regional accounting firm and then a principal at E. Cohen and Company, CPAs, an award-winning, nationally ranked CPA firm, which merged into Marcum in 2022.

Professional & Civic Affiliations

  • American Institute of Certified Public Accountants (AICPA)
  • Maryland Association of Certified Public Accountants (MACPA)
Industry Focus

Real Estate
Professional Services


Bachelor of Science, Accounting
University of Maryland

Master of Business Administration, Finance and Accounting
University of Maryland