About Brian

Brian Duffy is a partner in Marcum’s Advisory services group. His experience in public accounting includes planning, organizing, administering, and supervising all phases of audits and other financial engagements as an auditor for two of the largest public accounting firms in the world, serving both regional and national clients in leasing, real estate, retail, manufacturing, and legal industries, as well as Not-for-Profit entities.

Brian’s experience since leaving public accounting includes performing all manner of consulting services in the area of forensic accounting and litigation support services in connection with trustee proceedings, securities violation actions involving some of the largest public and private companies and their accounting firms (including cases involving Rite Aid, one of the largest accounting frauds in U.S. history, other high-profile matters such as those involving Wilmington Trust, Petrobras S.A., Lehman Brothers, WorldCom, Inc., Tyco, Inc., Household International, Inc. and Flowserve, Inc), and in a “pro-bono” capacity in matters relating to alleged human rights violations by two of the largest multination oil and gas companies in the world, as well as in connection with shareholder derivative claims, Federal false claims, and other litigation.

Brian has led various complex engagements from their inception through Federal and/or state trials, including providing services such as consulting on accounting and auditing standards, financial statement misstatements, SEC reporting, the computation of damages (including in matters relating to various multinational pharmaceutical companies with the U.S. Government and certain state Attorney General Offices, including Texas, West Virginia, Missouri, New York and Iowa), and investigating fraud allegations. Such services include participation in drafting or responding to complaint allegations involving accounting and auditing standards, consulting with counsel regarding accounting, auditing, and fraud-related issues, the review of documents and related analyses, assessing the financial statement impact of accounting errors and misstatements, assessing abuse within organizations, assisting counsel in preparation for deposition, authoring declarations and expert reports in the context of litigation, assisting counsel in preparation for trial, and providing expert testimony in deposition and trial.

Professional & Civic Affiliations

  • American Institute of Certified Public Accountants (AICPA)
  • Association of Certified Fraud Examiners (ACFE)
  • Pennsylvania Institute of Certified Public Accountants (PICPA)
  • Bicycle Coalition of Greater Philadelphia – Finance Committee (Philadelphia, PA)
  • Friends of Weccacoe Park (Philadelphia, PA)
  • The V Foundation for Cancer Research (Cary, NC)


  • Philadelphia Business Journal, “40 Under 40″ Honoree
  • PICPA, 2014-2015 Young Leader Award
Industry Focus

Real Estate


Bachelor of Science in Accounting, Eighth in class; Magna Cum Laude
Villanova University

Bachelor of Business Administration, Finance, First in class; Magna Cum Laude
Villanova University

Professional Designations

CPA – Certified Public Accountant, conferred by the American Institute of Certified Public Accountants
CFF – Certified in Financial Forensics, by the American Institute of Certified Public Accountants
ACFE – Association of Certified Fraud Examiners (ACFE)