Robert O. Mayer


Partner Emeritus
New York – Woodbury

516.921.8900 / Ext. 10510Contact

Professional Experience

Robert O. Mayer is a Partner Emeritus of Prager Metis, a member of Prager Metis International Group. He also serves as Co-Lead of the CFO Advisory Services. Mr. Mayer has over forty years of experience in the accounting profession.

Mr. Mayer’s entrepreneurial spirit and innovative growth strategies are among the many assets that he provides to his clients. In 1973, Mr. Mayer started his accounting career at a then big 8 accounting firm before joining an accounting firm as its second staff person and helped the firm grow to 40 employees within five years. Mr. Mayer spent five years as a staff member at Prager and Fenton. Mr. Mayer went on to be the chief financial officer for a Long Island company; he helped that company expand from one location to five and increase sales from $12 million to $60 million over five years.

Mr. Mayer has been included in Long Island Business News’ “Who’s Who in Accounting” and was recognized by the publication in 2010 as among Long Island’s highest achieving “50 Around 50.”

Prior to joining Prager Metis, Mr. Mayer was the managing partner of Mayer CPAs LLP, who joined Prager Metis in 2016.

Professional Affiliations

  • American Institute of Certified Public Accountants
  • New York State Society of Certified Public Accountants
  • National Conference of CPA Practitioners


  • Named Long Island Accounting's "25 Most Powerful People"


  • BA, Accounting Hofstra University, New York

Civic Affiliations

  • Alzheimer’s Association – Long Island Chapter – Advisory Board Member
  • Corporate Committee of the Nassau County Museum of Art – Co-Chair
  • Hofstra Business School Advisory Board

5 Factors to Consider When Choosing the Right Location for Your Business

Whether you’re starting a new business, moving to a new location, expanding to new markets, considering acquisitions, or entering the U.S. from another country, partnering with the CFO Advisory team for site selection services will allow you to make educated, confident decisions. Read the article "5 Factors to Consider When Choosing the Right Location for Your Business" by Robert O. Mayer, CPA to find out more.

Read More »

Case Study: CFO Advisory Team Assists Italian Company with Audit and SEC Reporting

When an Italian Company was having difficulty with a U.S.-based auditing firm, a Partner and Director of the Italian Group in the International Department of Prager Metis CPAs, Andrea Fantozzi, referred the Company to Prager Metis - CFO Advisory Services. We were retained by the Italian Company, and immediately got to work assisting the CFO and Controller by providing documentation that would satisfy the auditors and required by the Company to move forward with its planned public offering.

Read More »