Flo Ostrum

Grant Thornton, LLP

Flo Ostrum is an Audit Partner in the Firm’s National Professional Standards Group.  She brings over 25 years of experience working in the government and not-for-profit sectors to clients and engagement teams across the firm.     


Flo is a national resource for all engagements conducted under Government Auditing Standards. This includes government and not-for-profit financial statement audits, examinations, incurred cost audits and performance audits.   She represents the Firm on the AICPA State and Local Government Expert Panel.  Flo also serves on the AICPA Governmental and Not-for-Profit Training Program Committee.  She speaks frequently at AICPA and other state societies’ conferences on Government Auditing Standards, GASBs, Single Audits and general auditing and accounting matters.   

Flo’s client experience includes a variety of both state and local and federal government clients.  In addition, her background with not-for-profit organizations as well as for-profit companies enables her to be a resource for engagements where government intersects with them.  She consults with teams on challenging auditing, accounting and Single Audit issues as well as performing technical reviews of state and local government and not-for-profit clients.  

Professional qualifications and memberships

  • Flo is a Certified Public Accountant in the State of Florida. She is a member of the American Institute of Certified Public Accountants and the Florida Institute of Certified Public Accountants.


  • University of Florida, Master of Accounting
  • University of Florida, BS in Accounting