Greg Koelling, <span class="title">CPA</span>

Greg Koelling, CPAHe | HimDirector

P 630.703.7444 | F 630.581.8301

Greg Koelling has been with ORBA since 2001, working in both the audit and tax groups. He is a Director and a member of the Executive Board. Over the course of his career, Greg has gained extensive experience serving individuals, partnerships and privately-held corporations. His specialties include federal and state tax planning and consulting for owners and key executives. In addition, he represents taxpayers in front of the Internal Revenue Service and state taxing authorities.

Greg specializes in tax planning and compliance strategies for multi-state businesses, investment companies and real estate entities. He also helps clients with sales, mergers and acquisitions and compensation planning. Greg works closely with many real estate, finance, investment and professional service businesses.

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Firm News

08.11.25

ORBA Ranked as a 2025 Top 200 Firm by INSIDE Public Accounting
CHICAGO — ORBA, one of Chicago’s largest public accounting firms, has once again been recognized as a 2025 IPA Top 200 Firm by INSIDE Public Accounting (IPA). This marks the eleventh time since 2013 that ORBA has made the list of the country’s top firms. In the IPA’s annual report, ORBA is ranked #113, climbing five spots higher than last year, and is the highest ranked of the six Illinois firms on the Top 200 list.

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seminars & events

Guides

ORBA will gladly provide you with hard copies of the useful guides listed below. Select which guides you would like to receive and submit the form below.

  • Tax Pocket Guide
  • Tax Planning Guide
  • Records Retention Schedule
  • Auto, Travel & Business Log

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