Let us be your most trusted advisor

Sullivan and Gannon, LLC is an accounting firm located in Chelmsford, MA but serving clients in all areas.  Our team of professionals provide accounting, tax and advisory services to a select set of industries.

We're an accounting firm that offers a personalized, comprehensive, professional approach. Whether we're handling your business or personal taxes, audit, or other accounting needs, we'll work with your attorneys, bankers and investment advisors to provide solutions that best meet your specific needs.


Assurance & Accounting Services

Tax Planning & Preparation


Contact Us

Sullivan and Gannon, LLC
22 Central Square
Chelmsford, MA 01824
(978) 244-2470
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