Picture of Jeffrey Weiner

Jeffrey M. Weiner joined Marcum in 1981 and has led the firm since 1990, when he was named managing partner. In June 2017, he was named Chairman & Chief Executive Officer. Under his leadership, Marcum has expanded from a one-office regional firm of 20 employees to a firm ranked among the largest in the United States.

Mr. Weiner has been single-minded in diversifying Marcum’s services and capabilities to meet the evolving needs of the Firm’s clients, a key factor in the Firm’s continuing growth. In addition to the core tax and accounting business, Mr. Weiner has built a multiservice organization providing a comprehensive range of professional services, including accounting and advisory, technology solutions, wealth management, and executive and professional recruiting. The Marcum Group companies include Marcum LLP; Marcum Technology LLC; Marcum Search LLC; Marcum Staffing LLC; Marcum Financial Services LLC; Marcum Bernstein & Pinchuk LLP; and Marcum RBK (Ireland) Limited.

Mr. Weiner has also steadily expanded the Firm’s global footprint through strategic mergers, acquisitions and joint ventures in major business markets across the country and overseas. Today, Marcum LLP is one of the largest independent public accounting and advisory services firms in the nation, with offices throughout the U.S., as well as Grand Cayman, China and Ireland. Headquartered in New York City, Marcum provides a full spectrum of traditional tax, accounting and assurance services; advisory, valuation and litigation support; and an extensive range of specialty and niche industry practices. The Firm serves both privately held and publicly traded companies, as well as high net worth individuals, private equity funds and hedge funds, with a focus on middle-market companies and closely held family businesses.

Mr. Weiner has been singled out for his leadership role in the accounting industry. In 2016, he became the first and only U.S. accounting firm leader to be twice named an “MP Elite” by Accounting Today. In inducting Mr. Weiner to the exclusive MP Elite class, the publication noted his achievement in continually growing Marcum’s revenue, reach and relevance. “[Mr.] Weiner was a member of our inaugural class of the MP Elite in 2012, and it’s no accident that he returns this year - he’s one of the most admired firm leaders in the country, and continues to lead Marcum to new heights, remaining just as aggressive in both M&A and organic growth. When he first made the list, we noted his national drive; now we can note his international drive, with a major presence in China. He keeps the firm innovative with new offerings in practice areas like LGBT services, cybersecurity, and alternative investments, and built a stable of affiliated companies in wealth management, technology, executive search and more…Weiner is truly one of the Elite,” the editors wrote. The MP Elite are a group of accounting firm leaders “who point the way to the future, who set the best practices that others follow, and who lead the most successful, most admired firms.” Just eight accounting firm leaders nationwide were selected as members of the MP Elite class of 2016.

Mr. Weiner was previously recognized by Accounting Today as one of the industry’s Top 100 Most Influential People of 2010. In 2013, he was voted one of the industry’s Top Five Most Admired Peers in a national poll by Inside Public Accounting. He has been profiled twice as a New York City CEO by Leaders magazine, which in 2016 highlighted the nine core values that are the foundation of Mr. Weiner’s management ethic for Marcum.

In addition to his responsibilities as chairman and CEO, Mr. Weiner manages Marcum’s entertainment practice and is a nationally recognized expert on personal business management for the entertainment industry. He co-produced Jason Bourne, the fifth installment of Universal Pictures’ Bourne franchise, starring Matt Damon in the title role, which opened in July 2016. He previously served as executive producer of The Bourne Supremacy and The Bourne Ultimatum, also starring Matt Damon and released in July 2004 and August 2007, respectively. He was executive producer of The Hades Factor, a mini-series that aired on CBS television in April 2006, and a producer of The Bourne Legacy, released in August 2012, starring Jeremy Renner.

Mr. Weiner is a founding member of the LEA/Leading Edge Alliance, an international association of independent accounting firms. LEA has honored Marcum with LEA Edge Awards for industry excellence in several categories, including Mr. Weiner’s blog, Thoughts of the Week. Marcum was also the recipient of the LEA Innovative Firm Initiative of the Year Award, for the first annual Marcum MicroCap Conference in 2012, a nationally recognized event that has become a benchmark in the accounting and small cap industries. Additionally, in 2016, the Marcum Foundation was honored with the Edge Award for Outstanding Community Service, capping its first full year as a national charitable organization. In 2009, Mr. Weiner was distinguished with the LEA On the Edge Innovation Award, which recognizes an individual who has made an enduring and pioneering contribution to the public accounting profession.


  • LEA/Leading Edge Alliance, Founding Member
  • Long Island Business Development Corporation, Advisory Board
  • CPA Journal, Editorial Board
  • Children’s Medical Fund of New York, Vice President, Executive Board Member
  • Nassau County Society for the Prevention of Cruelty to Animals, Board member