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Worldwide Directory

Giambalvo, Stalzer & Company, CPAs, P.C.

Long Island, New York, USA

GS&Co. is one of the top 50 accounting, tax, and business advisory firms on Long Island, NY. We offer a full range of business advisory services including tax, assurance, corporate finance, forensic accounting, business reorganization, management consulting and estates and trusts. We are dedicated to assisting clients in making decisions that will achieve or surpass their own goals.

GS&Co. provides outstanding service to our clients because of our dedication to three underlying principles of professionalism, responsiveness, and integrity.

Our firm is one of the leading firms in the area. By combining our expertise, experience and the energy of our staff, each client receives close personal and professional attention.

Our high standards, service and specialized staff spell the difference between our outstanding performance, and other firms. We make sure that every client is served by the combined expertise of the firm’s partners and staff.

Regardless of the size of the business, we make sure our clients get the attention they deserve. We take deadlines seriously and understand that speed and efficiency create advantages. We go where the client needs us, and bring the latest technology and automated tools to help get the job done timely and accurately.

Our attention to quality is evident in our adherence to high standards of professional and business ethics and the credentials of our staff. We undergo a peer review process every three years and conduct internal inspections annually. We are pleased to report that we have received a positive opinion as reported by the peer review (pass with no deficiencies). In addition, this report was issued with no letter of comments about our work (less than 5% of accounting firms in the country receive such an opinion).

In today’s competitive environment, setting and achieving high standards is expected and is good business practice. Our own internal inspections of quality professional service and the results of our peer review provide a positive basis for differentiating from other firms.

Our quality control program includes independent reviews of all client engagements, an annual internal inspection that is more extensive then the triennial peer review, quality control reviews for engagements prior to issuance of the financial statement, and strict independence requirement

Practice Areas

  • Accounting
  • Auditing
  • Tax Services
  • Consulting
  • Forensic Accounting
  • Business Planning
  • Personal Financial Planning


  • Service
  • Sales and Distribution
  • Manufacturing
  • Construction
  • Real Estate
  • Healthcare
  • Not for Profit


Please direct all enquiries and requests for information to the Primary International Contact Partner listed below which has been identified for the selected MSI member firm.

Primary Contact

Robert Giambalvo, CPA


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Additional Contacts

Herbert J. Stalzer, CPA


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George Victor, CPA


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3500 Sunrise Highway
Suite 100 Bldg 200
Great River
New York 11739

+1 (631) 321 8000