Mary May


Employee benefit plans
Financial Statements

Headshot of Mary May, a Principle at Tonneson and Co.


Wakefield, MA

Mary is a highly experienced Principal at Tonneson, bringing over 35 years of professional experience to the firm. Since joining the audit department in 1988, Mary has demonstrated exceptional expertise in providing accounting, audit, and tax services to closely-held businesses. 

With a focus on Assurance Services and Client Accounting Services, Mary has developed a deep understanding of the unique needs and challenges faced by clients in various industries, including manufacturing, professional services, private foundations, and employee benefits. She has also taken on the role of Employee Benefit Plan Director and shares the responsibility of performing pre-issuance reviews of financial statements. Furthermore, Mary plays a crucial role in overseeing the Client Accounting Services department, ensuring high-quality services and client satisfaction. 

Mary earned her BS in business administration from Salem State University. As a dedicated professional, she is a member of the Massachusetts Society of Certified Public Accountants (MassCPAs) and the American Institute of CPAs (AICPA), actively engaging with professional communities and staying updated on industry trends and best practices. 

Beyond her core duties, Mary is actively involved in mentoring staff, sharing her expertise, and guiding the professional growth of her colleagues. She also contributes to strategic planning initiatives at Tonneson, playing a key role in shaping the firm’s direction and ensuring its continued success. 

Mary’s commitment to giving back extends to her community involvement and charitable efforts. She volunteers her time and expertise in numerous charitable events sponsored by the firm, contributing to the betterment of society and making a positive impact. 

Mary’s dedication to her clients, her commitment to professional development, and her active involvement in the community make her an invaluable asset to Tonneson. Her passion for her work, coupled with her diverse interests and strong connections with her loved ones, contribute to a well-rounded and fulfilling life. 


Get to know Mary May

Outside of work, Mary cherishes time spent with her family and friends. She enjoys attending sporting events and concerts, particularly as a fan of Boston sports teams. Engaging in hobbies like scrapbooking and playing cribbage and card games brings her joy and relaxation. Mary also loves her annual vacations to Aruba where she gets to relax and recharge. Mary grew up in Saugus, MA, and has a daughter she loves to spend time with.