Owen L. Kilgannon, CPA

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Owen L. Kilgannon, CPA

Tel. #:  631-321-8000 ext. 211


Owen began his accounting career with Ernst & Ernst in Manhattan,  He also worked with several small firms and then started his own practice in Massapequa in 1966.  Under his leadership, the firm grew to 25 professional staff, and in 2001 his firm merged into GS&Co.  Owen currently serves as consultant to GS&Co. and continues to service his clients.  Owen’s extensive experience and professional contacts enable him to serve a wide range of clients in the construction, legal, realty and estate areas.

Professional and Community Involvement

Owen remains active with numerous organizations, including serving on the finance committee for Catholic Charities and the advisory board of Valley National Bank.  He is a member of the American Institute of Certified Public Accountants, the New York State Society of Certified Public Accountants and the C.W. Post Tax Institute.  


Owen graduated from St John’s University earning a Bachelor of Science in Accounting.