• Expertise

    Drawing on the firm’s 40 years of experience, we provide solutions that leverage best practices in your industry.

  • Initiative

    Our forward-thinking team of advisory professionals constantly stays connected to your business and its challenges.

  • Collaboration

    We create a collaborative relationship with you to foster joint awareness and understanding around the services we provide.

Businesses in the start-up phase through third- and fourth-generation companies are in our fields of expertise. We can assist with corporate finance, mergers, acquisitions and transactional services, succession planning, global initiatives and more.

We have become one of the leading independent public accounting firms in New England by developing a group of professionals who are committed to providing the highest quality of professional services. Many of our professionals hold advanced degrees in taxation or business administration.

We maintain a personal touch, while offering the resources of a firm that is large enough to satisfy your ongoing needs.

Collaborative relationships that drive meaningful results.

We form deep collaborative relationships with business owners by being available and in constant contact, providing insights and thoughtful guidance.

At tonneson + co, our advisory services include:



Ready to partner with someone who wants to learn more about your business and aid in your success? Reach out to one of the advisory professionals on our team.

Interested in exploring how we can work together?