Sheehan Phinney Welcomes New COO 2025
(Boston, MA, Manchester, NH, June 5, 2025) Sheehan Phinney is proud to announce the appointment of Brian P. Monahan as Chief Operating Officer.
As chief operating officer, Monahan is responsible for leading the firm’s administrative and business operations and serves on the firm’s management committee. He has over 25 years of experience leading teams in complex high-growth environments, and his primary focus is on delivering effective and cost-efficient services to the firm’s clients. Specifically, Monahan leads a team of professionals across multiple disciplines including finance, business development, information technology and security, human resources, facilities and office services, and compliance enabling cross-functional collaboration to realize firm goals.
Michael Lambert, Firm President and Managing Director said, “We are thrilled to welcome Brian to the Firm. His exceptional leadership, strategic insight, and proven track record in operational excellence make him an invaluable addition to the Firm. As a key member of our leadership team, Brian will play an instrumental role in supporting our continued growth, innovation, and commitment to delivering outstanding service to our clients.”
Before joining the firm, Monahan served as the chief operating officer of a service provider in the insurance industry as well as the chief financial officer of a publicly traded multinational manufacturing company. He began his career in public accounting, including time with PricewaterhouseCoopers.
Monahan received his B.S. in Accounting from the University of Massachusetts and is a licensed Certified Public Accountant.
About the Firm
Sheehan Phinney is a full-service business law firm representing local, national and international clients with creative solutions and exceptional results. Founded in 1937, Sheehan Phinney has grown to over 70 attorneys with five offices throughout New Hampshire, Massachusetts and Vermont, and is known for professional excellence, practical counsel and commitment to both its clients and the communities it serves. Sheehan Phinney is the exclusive member in New Hampshire of Lex Mundi, the world’s leading association of premier independent law firms.