Skip to the content


As one of the largest regional firms in New England, who was recently recognized by Accounting Today as a "Firm to Watch," Whittlesey provides expert counsel in the areas of accounting, security, IT, and business structure.

For more than five decades, Whittlesey has provided assurance services to thousands of for-profit and nonprofit clients. Focused on integrity and service, we customize our approach based on your specific needs while also providing business guidance, especially when key decisions need validation.

When objectives and related decisions are of critical importance, Whittlesey provides expert counsel in a variety of areas, including business, strategic and succession planning, asset protection, estate planning, security, tax advising, and computer network consulting.


Whittlesey has offered federal and state tax services for both individuals and businesses for more than five decades, working with clients year-round to provide services that cover everything from tax planning and preparation to tax compliance and financial audits.

Whittlesey provides businesses and nonprofit organizations with personalized services to optimize their technology, including network security and information systems reviews, with specialization in the areas of nonprofit technology, systems support, and cybersecurity.

Changes Ahead

Does your organization have a succession plan? Whittlesey is here to help. Here's a few key reasons why businesses need a succession plan for their success. 

Ready to Connect?

We deliver personalized, expert services. Find out what we can do for you.