Mary Margaret Prange, CPA

Mary Margaret Prange CPA | Partner | Calibre CPA Group PLLC

Up Close & Personal

  • Where were you born and raised?Lynchburg, VA
  • What’s your favorite thing to do in Washington, DC? I like to attend events at the Kennedy Center, National Theatre, as well as Nationals and Capitals games
  • What are your interests/hobbies outside of the office?I studied vocal performance/education and sing lead in the Vienna-Falls Chorus, which is a chapter of Sweet Adelines International (SAI). I also currently serve in other capacities for SAI.
  • Do you have any pets?I have a Rhodesian Ridgeback, named Lucy
  • What would people be surprised to know about you?I’m an only child and I’m actually an introvert

Mary Margaret Prange, CPA


Mary Margaret Prange, CPA, is an Audit partner with Calibre CPA Group. She has been in public accounting since 2001. Mary Margaret has significant audit experience with not-for-profit organizations including trade and professional associations, charitable foundations, advocacy groups, faith-based organizations, employee benefit plans and labor unions. She is the head of the firm’s Continuing Education Committee and is responsible for planning, developing and delivering a majority of the firm’s internal Continuing Professional Education (CPE) programs each year in coordination with the firms Director, Training and Development. She is also responsible for developing and administering the firm’s summer externship and internship programming each year.

Professional Experience

Mary Margaret’s responsibilities include all aspects of engagement performance including planning, supervising and conducting audit fieldwork, preparing financial statements, auditor’s reports and management letters and presenting audit results to clients. Her tax compliance responsibilities include preparation of annual tax and exempt organization information returns and determining unrelated business income tax liabilities. Mary Margaret has also performed many audits in accordance with Uniform Guidance for organizations receiving Federal awards and has a working knowledge of government grant administrative requirements and cost principles. She assists clients with consulting projects including accounting software implementation, budgeting/forecasting, and understanding and developing strategies to meet Federal compliance guidelines.

As a regular presenter for educational seminars, conferences and client events, she has developed and taught a number of courses on auditing and accounting for tax-exempt organizations, as well as a multitude of other programs. Mary Margaret has also written numerous articles for a variety of publications covering issues that affect labor organizations and the not-for-profit industry.

Education and Relationships

Mary Margaret received a Bachelor of Business Administration with a concentration in Accounting from James Madison University and is a Certified Public Accountant licensed in the District of Columbia, Commonwealth of Virginia and State of Maryland. She is a member of the American Institute of Certified Public Accountants, Greater Washington Society of Certified Public Accountants and the Virginia Society of CPAs. She also serves as a Committee member for the James Madison University School of Accounting Guiding Executive Advisory Committee and the Women for Madison Executive Advisory Committee.