Our People

John W. Haag Sr., CPA/ABV, CVA, CFF


John Haag is the Managing Principal of the firm's Midland office, serving in the business and management consulting group. He is a member of the firm’s Business Valuation and Litigation Support Services Group. He is also a member of Yeo & Yeo's Career Advocacy team. He joined the firm in 2002.

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  • Business valuation and litigation support services for privately owned businesses
  • Preparation of individual and corporate income tax returns and financial statements
  • Preparation of trust and not-for-profit tax returns, including foundations
  • Managerial consulting, including designing and implementing accounting systems and internal controls
  • Consulting related to new business start-ups, corporate restructuring and succession planning

Professional Certifications and Education

  • Certified Public Accountant (CPA)
  • Accredited in Business Valuation (ABV)
  • Certified Valuation Analyst (CVA)
  • Certified in Financial Forensics (CFF)
  • Eastern Michigan University, Bachelor of Business Administration in Accounting
  • Eastern Michigan University, Master of Science in Accounting

Professional Membership

  • National Association of Certified Valuators and Analysts - President of Michigan Chapter
  • American Institute of Certified Public Accountants
  • Michigan Association of Certified Public Accountants
  • Michigan Association of Certified Public Accountants Litigation and Business Valuation Task Force
  • AICPA Forensic and Valuation Services Section


  • Key Ingredients to Success for Entrepreneurs
  • Published articles in the firm’s The Advocate and The Leading Edge client newsletters on business valuations, internal controls and fraud
  • Presented various seminars on tax planning, business valuation standards, and corporate fraud to attorneys and local service clubs
  • Expert panelist at QuickBooks training seminars
  • Instructor for firm’s internal corporate income tax classes

Community Involvement

  • Midland Noon Rotary Club, Past President
  • Midland Community Foundation Grant Committee Member
  • United Way of Midland County Community Investment Panelist and Loaned Executive
  • Midland Exchange Club, Past President
  • Midland MyPros Steering Committee, past Chair
  • Saginaw Rotary Club, Sunrise, former Treasurer
  • Plymouth Symphony Orchestra, former Accounting Director
  • Junior Achievement of Northeast Michigan, Instructor
  • Leadership Midland Alumni
  • Midland Experimental Aircraft Association, Treasurer


  • National Association of Certified Valuators and Analysts / CTI "Forty Under 40" honoree, June 2014
  • Thomas J. Thompson Achievement Award (2007) honoring one Yeo & Yeo employee each year
  • Molitor International’s 1000 Leaders Program, graduate