John Griffin

John is a Director in the Tax Department at Tonneson, bringing nearly 20 years of professional experience. He specializes in Tax Accounting Methods, State and Local Tax Matters, and Income Tax Provisions, assisting clients across industries such as software, manufacturing, and retail.

John holds a BA from the College of the Holy Cross, a JD from Suffolk University, and a Tax LLM from Boston University. As a Certified Public Accountant (CPA), he stays engaged in industry developments and best practices.

Beyond his technical expertise, John is committed to mentorship and professional development, ensuring that both clients and colleagues benefit from his depth of knowledge. He also contributes to his local community as a member of the Town of Arlington’s Finance Committee.

John’s motivation comes from his passion for delivering high-quality client service and building meaningful professional relationships.