John Manning

WM John Manning


Boston College
Masters of Finance

University of Massachusetts
Bachelor of Business Management

Years of Experience

30 Years

Industry Expertise

Life Sciences, Software, Technology

Big Four Alma Mater


John Manning

Partner – Advisory

John brings more than 30 years of accounting, financial reporting and executive management experience to WilliamsMarston. Prior to WilliamsMarston, John was a partner at Deloitte LLP where he held a variety of senior leadership roles, including responsibility for engagement-related independence matters. While at Deloitte, John was the lead audit partner on many of the firm’s largest international technology and life sciences clients, consulting with senior management and their board of directors on complex global business transactions and served as a technical consultation and strategic risk assessment clearing partner in the firm’s Northeast region. John’s experience includes complex revenue recognition, business combinations, SEC reporting, and evaluating M&A transactions across the deal lifecycle in both domestic and international markets. His broad industry expertise includes life sciences, technology, and software.

John is a Certified Public Accountant in the Commonwealth of Massachusetts and a member of the American Institute of Certified Public Accountants. He holds a Masters of Finance degree from Boston College as well as a Bachelor of Business Management degree from the University of Massachusetts.