John Harradon



Assurance services
Advisory services
Mergers and acquisitions

Headshot of John Harradon, a Shareholder at Tonneson and Co.


Wakefield, MA

John is a shareholder at Tonneson who brings over 35 years of professional experience to the firm’s audit department. John joined the firm in 1983. With a deep understanding of assurance and advisory services, mergers and acquisitions, and succession planning, John plays a crucial role in providing valuable insights and expertise to clients across various industries such as manufacturers, distributors, construction, professional services, life sciences, technology, and independent private schools and non-profits.

John holds multiple certifications, including being a CPA, a Certified Fraud Examiner (CFE), and Certified Financial Forensics (CFF). His educational background includes a BSBA from Ithaca College. As an active member of esteemed professional organizations like the American Institute of CPAs (AICPA), the Massachusetts Society of CPAs (MassCPAs), and the Association of Certified Fraud Examiners, John remains committed to staying at the forefront of industry trends and best practices.

John’s extensive experience, coupled with his dedication to continuous learning and giving back, makes him a valuable asset to Tonneson. His expertise in assurance and advisory services, mergers and acquisitions, and succession planning contributes to the firm’s ability to deliver exceptional results to clients across a wide range of industries.


Get to know John Harradon

While excelling in his core responsibilities at the firm, John also finds fulfillment in supporting charitable organizations and giving back to the community. Furthermore, he serves as a mentor to staff, providing guidance and support to help them achieve their professional goals.