John E. Hadwen


Tax Director

John Hadwen joined ARB in 2021. He is a Director specializing in providing comprehensive tax compliance and tax consulting relating to partnership, corporate, individual, construction, manufacturing, and professional service firm, and real estate taxation. Prior to joining ARB, John was a Tax Principal at a large, regional CPA firm.

Education and Designations

  • Bachelor Degree, University of Southern Maine
  • Certified Public Accountant (CPA)


John lives in Falmouth, Maine, with his wife, Erin, and their two daughters.  He enjoys spending quality time with his family  and playing golf.

Community Involvement

  • Former Treasurer Val Halla Golf Association


As the Practice Leader of ARB’s Auto Dealership Group, Bart routinely assists auto dealerships in navigating manufacturer compliance issues, owner transitions, acquisitions and dispositions, among other industry specific challenges. Bart works with dealerships to identify opportunities to improve systems and profitability using the ARB Dashboard, a custom-designed financial benchmarking tool. Using the Dashboard, Bart and the ARB Team are able to help dealership clients gain a clearer picture of their operational statistics, their profitability, and areas of opportunity.
In working with closely held businesses, Bart has developed a true understanding of the intricacies of navigating accounting and tax services for businesses with family dynamics. His expertise allows him to provide services of the highest degree that are beneficial for businesses and their shareholders, partners, members, and related ventures, trusts, and estates, alike.
Bart works extensively with corporations, partnerships, and LLCs on tax compliance and planning matters. He provides financial projections, cash flow and profitability analyses, due diligence and M&A services, along with process improvement, strategic planning, and many other services to ARB’s business clients.

Professional Associations