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Greg Koelling, CPA


Phone: 312.670.7444

Fax: 312.670.8301

Email: gkoelling@orba.com


Greg has been with ORBA since 2001, working in both the audit and tax departments. Over the course of his career, he 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 state tax planning and compliance strategies for multi-state businesses. He also helps clients in the health care field with tax planning, compensation methods and strategic assistance with mergers and acquisitions. Greg also works closely with many real estate development, contracting, manufacturing and distribution, advertising/PR and professional service businesses.


As head of ORBA’s State and Local Tax Group, Greg is continuously developing not only his own expertise, but also the expertise of those around him in order to remain up to date on the most current tax law issues and industry trends that may affect ORBA’s clients. It is important for him to get to know his clients and understand their businesses so that he can provide them with the best service and advice. Greg strives to go above and beyond his clients’ expectations to see that all their needs are met.

Greg works hard to build long-lasting relationships with his clients, along with teaching and sharing his knowledge with ORBA's staff to build a stronger, more knowledgeable team.

Outside of the Office

At home, Greg really enjoys the process of building a solid and complete structure as he has both refinished a bathroom and his basement. At work, Greg is interested in building a strong, long-lasting relationship with his clients, along with teaching and sharing his knowledge with others at ORBA to build a stronger, more knowledgeable group. 

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