Berry, Dunn, McNeil & Parker, LLC (BerryDunn)

BerryDunn is a full-service accounting, assurance, and consulting firm headquartered in Portland, Maine, at 2211 Congress Street. Founded in 1974, the firm operates with a mission to empower the meaningful growth of its people, clients, and communities, fostering a fulfilling and engaging environment.

The firm offers a comprehensive suite of services including audit, tax, and various consulting specializations such as actuarial and analytics, business advisory, cybersecurity, grant consulting, information systems, organizational and governance, outsourced accounting, valuation, and transaction advisory. BerryDunn serves a diverse clientele across numerous industries, including commercial businesses, healthcare, education, technology, government (local, state, and Medicaid), energy, nonprofits, financial services, and manufacturing.

Sarah L. Belliveau has served as BerryDunn's CEO and Managing Principal since 2021, and has been recognized on Forbes' lists of America's Top 200 CPAs and America's Best-in-State CPAs. The firm consistently ranks among the nation's Top 100 Accounting Firms, marking its 11th consecutive year in 2026, and is recognized among the largest accounting firms in Boston and Maine. Recent activities include signing new clients, appointing a Chief Transformation Officer, and expanding its outsourced accounting team. However, the firm also faced a class-action lawsuit and agreed to a $7.25 million settlement in February 2025, following a 2023 data breach that affected over 1.1 million individuals.