Marcum LLP

Gary B. Rosen

Gary B. Rosen, Partner, Advisory
*Licensed by the States of New Jersey and New York

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Gary Rosen is a partner in Marcum’s New York Advisory Services division and a member of its Forensics Practice group. He provides accounting, audit and consulting services, including solvency, valuation opinions and asset recovery for numerous closely-held and public corporations, real estate entities, financial services institutions, business development companies, private equity funds, government agencies and international corporations.

Mr. Rosen has approximately 40 years of financial advisory, consulting, and public accounting experience with extensive background in fraud engagements, forensic accounting, complex litigation matters, shareholder/partnership disputes and other areas of investigative accounting.

He has testified as an expert witness in numerous litigation cases in a variety of federal and state courts regarding agreed upon procedures reports, fraud, lost profits, valuations, white collar crime, solvency, commercial and residential real estate, product liability, estate matters, shareholder and partner disputes and matrimonial matters. Where he is able to communicate complex financial information in a manner judges and juries can understand.

With extensive lecture and public speaking experience, Mr. Rosen is requested at national conferences on topics relating to internal controls, fraud and audits. He is a contributing author for one of Practitioners Publishing Company’s audit guides and also served as a professor at the graduate level at Monmouth University.

Mr. Rosen has also developed several continuing legal education seminars which he has presented to numerous law firms throughout the New York/New Jersey Metropolitan areas.

Professional & Civic Affiliations
  • American Institute of Certified Public Accountants (AICPA)
  • New Jersey State Society of Certified Public Accountants
  • New York State Society of Certified Public Accountants, Cannabis Committee
  • NACVA Litigation Forensics, Board Member, Valuation Credentialing Board
  • Turnaround Management Association
  • Brookdale College, Advisory Board Member
  • Monmouth University Business Council
  • Association of Certified Fraud Examiners
  • Needlers Foundation, Steering Committee Member
  • USA 500 Club, Founding Member, Midtown East Chapter
  • National Association of Divorced Professionals, Executive Committee
  • Staten Island Collaborative Law Group
  • NJCPA Society - 2018 Cannabis Interest Group Member
  • New Jersey Cannabusiness Association, Finance Chair
  • New Jersey Revenue Forecasting Advisory Commission, Former Commissioner
  • Western Monmouth Chamber of Commerce,Past President
  • Community Association Institute’s New Jersey Chapter, Past President
  • American Red Cross, Jersey Coast Chapter, Former Board Member
  • Justice Brandeis Law Society, Board Member
Subject Matter Expertise

Matrimonial Litigation
Professional Liability
CAM Audits
Breach of Fiduciary Responsibilities
Litigation Support
Fraud Engagements
Solvency Analysis
Business Valuation
Asset Recovery
Financial Due Diligence
Expert Testimony
White Collar Crime
Economic Damages
Real Estate Matters
Construction Litigation
Lost Profits
Accounting Malpractice Claims
Class Action Claims

Practice Focus

Law Firms
Cannabis Industry
Real Estate Entities
Financial Services Institutions
Government Agencies
International Corporations
Court Appointed Neutrals
Insurance Carriers
Business Development Companies
Private Equity Funds


Bachelor of Science, Accounting
Rutgers University

Testimony Experience


Related News

NJ Cannabis Insider interviewed Advisory Partner Gary Rosen in a Q&A about considerations for operating a leaf-touching business.

As Seen In

NJ Cannabis Insider interviewed Advisory Partner Gary Rosen in a Q&A about considerations for operating a leaf-touching business.

Keeping proper and accurate records so you're aware of the revenue stream that's coming from the leaf-touching business and the ancillary services.

Long Island Business News reported the promotion of 13 Marcum associates to the partnership.

As Seen In

Long Island Business News reported the promotion of 13 Marcum associates to the partnership.

Accounting and consulting firm Marcum LLP has promoted 13 associates to partner, including its chief information officer, who is based Long Island.

Marcum LLP Promotes 13 to Partner

Press Release

Marcum LLP Promotes 13 to Partner

Marcum LLP, a national accounting and advisory firm, today announced the promotion of 13 associates to partner.




Marcum LLP is one of the largest independent public accounting and advisory services firms in the nation, with offices in major business markets throughout the U.S., as well as Grand Cayman, China and Ireland.

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