Louis Grassi

Louis C. Grassi, CPA, CFE

CEO, Managing Partner

  • Jericho
  • (516) 336-2450
  • (516) 256-3510
Louis C. Grassi, CPA, CFE is the Chief Executive Officer, Managing Partner, and driving force behind the firm’s growth. He began his career in 1977 and has extensive experience in tax, accounting and consulting. Lou takes a proactive role with clients, performing such value-added services as profit-enhancement studies, operational reviews, performance benchmarking, forensic accounting, cost analysis, incentive compensation programs, estate and succession planning, corporate restructuring, and corporate retreat facilitation. Lou’s counsel has proven instrumental to the success of many companies in a variety of industries.

Lou has received a number of industry accolades, including being named one of the “Managing Partner Elite” by Accounting Today Magazine. His CPA peers also voted him to be among the “Most Admired Peers,” as awarded by INSIDE Public Accounting (IPA). Lou was also recognized as an “Outstanding CEO” by a major NY publication and was recently recognized as one of the “Kings of Long Island” by Queens Courier. Lou’s leadership, drive for success, and dedication to providing clients with high quality services has grown Grassi & Co. from a zero base firm to being ranked among the Top 70th largest Firms in the country by Accounting Today, among the top 17 Largest Firms in the New York area by Crain’s New York Business and the 70th largest and one of the 100 Fastest Growing Firms by INSIDE Public Accounting. IPA has also recognized Grassi & Co. as a “Best of the Best Firms” for nine consecutive years.  The firm was also recognized by Crain’s New York Business as one the 50 Fastest Growing Businesses in New York City.  Grassi & Co. was ranked among the top 40 fastest growing companies in the New York Metropolitan Area.  Grassi & Co. has also been ranked as the Best Place to Work by several publications.

Lou formerly served as Chair of Moore Stephens North America, part of an international association of more than 300 independent accounting and consulting firms.  As a nationally recognized expert, Lou is also frequently called upon as a lecturer and business advisor for companies and industry trade organizations. He has authored numerous local and national articles, also serving as a contributing editor to the Corporate Controller’s Manual and was the Editor of the Journal of Construction Accounting & Taxation. Lou was also an adjunct professor at Columbia University teaching a graduate level course in finance and accounting.

Lou has served as an executive board officer for the New York State Society of Certified Public Accountants (NYSSCPA), and he is a member of the American Institute of Certified Public Accountants (AICPA). Lou also serves on numerous committees and task forces within the industries that the firm serves.  A member of the Young Presidents Organization, he appears in both the national and international Who’s Who Directory of Finance, and he was a member of the Editorial advisory board of CPA Managing Partner Report, The CPA Journal, and other industry publications.

Actively involved in his community, Lou holds board positions with several civic and philanthropic organizations. He was also a member of the Nassau County Audit Advisory Committee, as well as a former member of the Nassau County Comptroller’s transition team and past chairman of a large Not-for-Profit human services agency. Additionally, Lou serves on the Board of Flushing Financial Corp, a $5 billion U.S. bank and BRT Realty, a publicly traded REIT.

A graduate of Queens College, Lou holds a Business Administration degree in Accounting. He has completed postgraduate courses in taxation and earned the designation of Certified Fraud Examiner (CFE) from the National Association of Certified Fraud Examiners.

Grassi & Co. Introduces Cyber and Information Security Practice (CIS)

Grassi & Co. is proud to announce that we will be offering additional consulting services through our new Cyber and Information Security Practice, which will be spearheaded by Karl Kispert.

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Grassi & Co. Launches New Affiliate, Grassi Healthcare Advisors, LLC (GHA)

Grassi & Co. is proud to announce the launch of Grassi Healthcare Advisors, LLC (GHA), which will be led by CEO Joseph Tomaino, previously the Principal of Healthcare Transformation Consulting of Grassi & Co. for the last three years.

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Grassi & Co. Ranks in 2017!

Grassi & Co. has been recognized by INSIDE Public Accounting (IPA) as the 70th largest firm in the country and the 73rd largest firm by Accounting Today. It was also named one of the Top 50 Fastest Growing Companies of 2017 by Silicon Review, and one of the Best Accounting Firms in New York City by AdvisoryHQ.

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Top 100 Accounting & Business Consulting Firm

In today’s economic environment, Organizations need the proper strategic guidance to help them leverage best practices, maximize profitability, and implement better decision-making.

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Grassi & Co.’s New Jersey Open House a Great Success

The Park Ridge, NJ office of Grassi & Co. held its grand opening last night to an attendee list of over 125 people.

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Grassi & Co. Acquires Bernstein and Seidman, CPA

Grassi & Co. is pleased to announce that they have acquired Bernstein & Seidman, CPA this week.
Robert M. Bernstein brings decades of experience in the field of Accounting. Over the past 30 years, the firm has accrued over 250 clients in various industries including retail sales, import/export, food, pharmaceuticals, real estate, and, most notably, the automotive industry.

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Grassi & Co. and James Bohl, CPA, PC Merge

As of January 1, 2017, Grassi & Co. is pleased to announce that they have merged with James Bohl, CPA, PC, resulting in James Bohl, CPA, PC now being known as Grassi Franchise Services, LLC. The merger of the two firms will bring an additional 25 professionals to Grassi & Co.’s team, including one new Partner, James Bohl, CPA.

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    BA, CUNY Queens College


    Managing Partner Elite, Accounting Today Magazine

    Voted among the “Most Admired Peers,” as awarded by INSIDE Public Accounting (IPA)

    Member of the American Institute of Certified Public Accountants (AICPA)

    Member of the Young Presidents Organization

    Member of the Editorial Advisory Board of CPA Managing Partner Report, The CPA Journal, and other industry publications
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