Bill Mills, Principal, Pinion, LLC

Bill has practiced in public accounting for over 25 years providing tax, advisory, and attest services to his clients. He is a highly accomplished accounting professional and an advocate for his clients ensuring they are abreast of the changing business and accounting regulation landscape and continually delivering comprehensive services to best serve them.

Bill is a true strategic advisor for his clients with a wealth of experience offering solutions to contemporary issues faced by business enterprises and their owners. Throughout his career,  he has honed his understanding and experience in assessing internal controls over financial reporting as well as information technology controls, allowing him to be a tremendous resource to his clients when evaluating the design and effectiveness of their internal control structures and providing recommendations for improvements.


Bachelor of Science in Agricultural and Managerial Economics, University of California, Davis


Certified Public Accountant (CPA)

Professional Associations

Member, American Institute of CPAs
Member, Montana Society of CPAs

Civic Associations

Board of Directors and Treasurer, Bozeman Schools Foundation
Board Member and Treasurer, Gallatin County CASA/Guardian ad Litem Program
Member, Finance Committee, Cancer Support Community of Montana

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