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Koski Professional Group, P.C.

  • 10516 Burt Circle
  • Omaha, NE 68114
  • Main Number: (402) 445-4040
  • Fax: (402) 445-4442
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Randall K. Koski, CPA

  • Phone: 402-445-4040 ext. 206
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Randall K. Koski, CPA, graduated with honors from Midland Lutheran College with a Bachelor of Arts Degree in Business Administration and a minor in economics.

Randy began to work with clients in the businesses of agriculture, health care, and manufacturing at his first position in public accounting in the Onawa and Sioux City, Iowa offices of Williams & Company.  He then spent several years with Goracke & Wilcox in Omaha prior to starting his own accounting practice in 1986. Koski Professional Group now employs a staff of fifteen, including 13 CPAs or CPA candidates.

Randy is a member of the American Institute of Certified Public Accountants, the AICPA Taxation Committee, the Accounting Research Association, the Nebraska Society of Certified Public Accountants, and served as Chairman of the Continuing Education Committee of the Nebraska Society.  He is a member of the professional division of the Phi Beta Lambda business association and served on the Business Advisory Board of the Midland Lutheran College chapter.  Randy has also served on the Government Relations Committee and the Reimbursement Committee of the Nebraska Health Care Association. 

Randy served as a director and officer on the Board of Directors of the Midland Lutheran College Athletic Boosters and the Midland Lutheran College Alumni Association.  He also served as a trustee and as Vice-Chairman of the Midland Lutheran College Board of Trustees.  Randy is a director and past treasurer of the board of directors of Kicks for a Cure, Inc., a charity that organizes a women’s soccer tournament and raises funds for cancer research.  He also served as the Chairman of the Board of Directors of the Heartland Foundation (Heartland School, Omaha, Nebraska) and serves as a trustee of the Nebraska Independent College Foundation.  

In addition to supporting the clients and staff of Koski Professional Group in the traditional accounting, auditing, tax and reimbursement work of the firm, Randy devotes substantial time to estate, gift, and retirement planning; business succession planning; acquisitions and mergers, particularly by consolidated groups; and major capital transactions, such as large asset purchases, refinancing of debt, and purchases and sales of a business or a segment of a business.

Michelle R. Thornburg, CPA

  • Phone: 402-445-4040 ext. 202
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Michelle R. Thornburg, CPA, received a Bachelor of Science Degree in Business Administration from Midland Lutheran College.  Michelle graduated Summa Cum Laude with majors in accounting and economics.  Michelle became a shareholder of the firm in January 1998.

Michelle has experience working with individuals and closely held businesses on their accounting, tax and financial planning needs.  In addition to the traditional accounting and tax services, Michelle has experience with mergers and acquisitions, employee benefit plans, and Nebraska incentive tax credits.  Michelle has provided services to clients in many industries including the following:

  • Long-Term Care Facilities
  • Farm Equipment Dealers
  • Agriculture
  • Insurance and Investment Representatives
  • Printing and Manufacturing
  • Physicians and Therapists
  • Sub-contractors

Michelle completed a four-year term on the Nebraska Board of Public Accountancy.  Michelle still serves as a member of the Educational Advisory Committee and the Peer Review Oversight Committee of the Board.

Michelle is a member of several other organizations, including the Nebraska Society of Certified Public Accountants, where she currently serves as Immediate Past Chairman, the American Institute of CPAs, Omaha Women’s Network, and the Millard Business Association.

Michelle has been involved with Junior Achievement, and has been a presenter at Math in Business Day, Expanding Your Horizons, and numerous high school and college classrooms.  Michelle also serves on the Business Advisory Board of the College of Saint Mary.

Adrian L. Lape-Brinkman, CPA

  • Phone: 402-445-4040 ext. 210
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Adrian Lape-Brinkman, CPA, graduated from the University of Toledo with a Bachelor of Arts Degree in Accounting.  Adrian became a shareholder of the firm in January 2010.

 Adrian has experience providing audits and compilations of closely held businesses and not for profit organizations.  Adrian has been involved with long-term care clients since he joined the firm in 2007.  His tax experience includes working with closely held companies and partnerships, including the related owners.  Adrian devotes his time to providing clients with ideas, tax planning, and consulting with them on various business and tax matters such as accounting methods, multi-state issues, succession planning, acquisitions and mergers.  Additionally, he has experience advising businesses and individuals with IRS and state examinations and protest letters.

 Adrian has provided services to clients in many industries including the following:


  • Manufacturing and Distribution
  • Agriculture
  • Retailers
  • Contractors
  • Dealerships
  • Long-Term Care Facilities

Adrian began his career in Toledo, Ohio in December 1996.  Prior to joining Koski Professional Group, Adrian was a tax manager with a large regional Midwest CPA firm. 

Adrian is a member of the Nebraska Society of Certified Public Accountants, Financial Service Professionals, Omaha Venture Group and Kiwanis.  Adrian serves on the board of Financial Service Professionals and participates in the mustache for kids fundraising.


Kelli S. Hauschild

  • Phone: 402-445-4040 ext. 220
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Kelli S. Hauschild, CPA, graduated with honors from Midland Lutheran College with a Bachelor of Science Degree in Business Administration with concentrations in Accounting and Management and a Bachelor of Arts Degree in Economics. Kelli joined Koski Professional Group, P.C. in 2008. In 2011, Kelli received her Masters Degree in Professional Accounting from Midland University.


Kelli has experience performing the following services:


  • Compilation, review, and audit of financial statements for nonpublic closely held businesses, not-for-profit organizations, and high wealth individuals
  • Medicaid and Medicare cost reporting, analysis, cost rebasing, adjustment review, appeals consulting, and reimbursement consulting
  • Tax return planning, consulting, and compliance for closely held businesses, trusts, not-for-profit organizations, and individuals
  • Gift tax compliance
  • Accounting method changes
  • Bookkeeping services


Kelli has experience in various industries including the following:


  • Health care including home care agencies, hospice agencies, doctor offices, wellness centers, and long-term care facilities including freestanding nursing facilities, nursing facilities with assisted living or independent living, and continuing care retirement communities
  • Dealerships
  • Agriculture
  • Financial Advisors, Insurance Representatives, and Investment Companies
  • Manufacturing
  • Retailers

Kelli is a registered tax professional with the Internal Revenue Service and a member of the Nebraska Society of Certified Public Accountants. Kelli is a member of the Iowa, Kansas, Missouri, and Nebraska Healthcare Associations, LeadingAge Kansas, and Heartland Women’s Network networking group. Kelli has also been a panelist for Expanding Your Horizons and is a past Treasurer of Omaha Business Women’s Network networking group. In 2017, Kelli will be on the reimbursement committee of the Nebraska Healthcare Association.

Michelle Blann

  • Phone: 402-445-4040 ext. 208
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Michelle Blann received a Bachelor of Arts Degree in Accounting from Bellevue University with a minor in Business Administration. Michelle joined Koski Professional Group, P.C. in June 2022 and has been working in public accounting since January 1995.

Michelle has experience working with a variety of business clients from Construction Contractors, Retail Businesses, Dental Practices to Bars and Restaurants. She specializes in bookkeeping services including Payroll, Sales Tax and Quick Books accounting software.

Michelle’s goal is to provide timely and accurate services to Koski Professional Group, P.C. clients. She enjoys assisting clients whether they have a Quick Books question, need assistance reconciling and preparing monthly financial statements or filing various tax returns. Michelle is here to help with your bookkeeping and accounting requests.

In addition, Michelle is also Treasurer of a local non-profit organization Lungs4Life Foundation Inc.

Dan Wells

  • Phone: 402-445-4040 ext. 218
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Jessica Kovarik

  • Phone: 402-445-4040 ext. 213
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Kevin Petersen

  • Phone: 402-445-4040 ext. 219
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Deanna Crichton

  • Phone: 402-445-4040 ext. 203
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Daniel Roman

  • Phone: 402-445-4040 ext. 209
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Brandi Shaw

Office Manager
  • Phone: 402-445-4040 ext. 223
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Mikayla Lape

Administrative Assistant
  • 402-445-4040 ext. 201
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Koski Professional Group, P.C.