About Timothy

Timothy (Tim) Duffy, Jr. is a Tax & Business Services partner in the Firm’s Philadelphia office. He leverages more than 15 years of experience in accounting to advise his clients, including stints at two “Big Four” accounting firms and roughly a decade in-house at a diversified construction and engineering company.

Tim serves clients in the construction, staffing, engineering, and real estate industries. In addition to the preparation and review of tax forms, financial statements, and reports, he is well-versed in best practices relating to compliance, audits, and overall reporting.

Tim joined Marcum in 2022 with the merger of Friedman LLP into the Firm.

Professional & Civic Affiliations

  • American Institute of Certified Public Accountants (AICPA)
  • Pennsylvania Institute of Certified Public Accountants (PICPA)
Industry Focus

Real Estate
Life Sciences, Pre-Revenue Companies


Bachelor of Science, Accounting
LaSalle University