O'Sullivan & Co

O'Sullivan & Co is a locally owned and operated progressive CPA firm located at 871 Turnpike Street in North Andover, Massachusetts. We are committed to advocating for our clients' success and challenging the status quo in the accounting and finance industry. Our team of accountants and certified public accountants offer a full suite of services to add value beyond basic accounting and tax filings. From initial setup to succession planning, we work with businesses of all entity structures and industries to build long-term relationships as trusted advisors.

We also assist high net worth individuals and business owners with specialized accounting, tax planning, and preparation services. Our expertise extends to a wide range of industries, and we serve clients throughout eastern Massachusetts, the Merrimack Valley, and Southern New Hampshire. As a progressive firm, we prioritize technology and offer consulting and managed accounting services, including outsourced CFO and bookkeeping services, to businesses nationwide.

Clients have praised our team for their skill, competence, judgment, and credibility, making us a highly recommended professional services group. Join us at O'Sullivan & Co for exceptional service and a commitment to your success.