We are Grant Thornton

Salt Lake City, Utah

  • Manufacturing, Transportation & Distribution
  • Technology, media & telecommunications
  • Transportation & distribution
Service Experience
  • Tax

Marion Mortensen




Executive summary


MK Mortensen has more than 15 years of experience in taxation with an emphasis in corporate tax and flow-through entities. Mortensen leads our tax engagements in the Salt Lake City office with corporate clients, lending his expertise in corporate and international tax planning, preparation and review. Additionally, his experience includes three years of financial and operational accounting in a publicly traded medical diagnostic company. As the controller, Mortensen’s responsibilities primarily included SEC filings, financial controls and cash management.

He has served clients in a variety of industries throughout his career, including those in the manufacturing, distribution, technology, professional services and related industries. He reviews and supervises the preparation and review of federal and state tax returns for a broad range of clients, including corporations, partnerships, trusts, foundations and individuals.



Professional qualifications and memberships

  • CPA — Utah
  • Utah Association of Certified Public Accountants, Tax Issues Committee, Chair
  • Brigham Young University, Marriott School of Management, School of Accountancy, Advisory Board

Community involvement

  • Boys and Girls Club of Greater Salt Lake, Board Member

Presentations and publications

  • Author, “Before You File,” Utah Business magazine, Nov. 1, 2001.


  • MA, Brigham Young University
  • BS, Accounting, Brigham Young University

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