Services for privately-owned businesses, we are Oldenburg Accountants and Advisors
Services for privately-owned businesses, we are Oldenburg Accountants and Advisors

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Business Solutions

We work with our clients to develop tailored solutions to all business needs, including accounting, tax, and business planning.

About Us

Oldenburg Accountants and Advisors has successfully served small and medium sized businesses and their owners since 1991. 

Contact Us

We welcome your questions and pride ourselves on being reachable and highly responsive. We look forward to working with you!

As a boutique CPA firm, we have the ability to provide personal attention to our clients who work directly with the owner Sue Oldenburg, not an associate accountant. Sue knows their business and personal financial situation inside and out.



“Oldenburg Accountants & Advisors assisted our small business with modernizing our bookkeeping procedures. Sue worked diligently to help us understand our finances and keep accurate records. We needed to do detailed financial projections for a possible business expansion this year. Sue's thoroughness and attention to detail put us in an excellent position and provided better reporting.”


“Our previous accountant was not engaged in our day-to-day business. Sue is the complete opposite! Sue ensures that we understand our finances and verifies that our records are accurate. Overall, the business is in a better financial position because we understand it better.”


“We have found that Sue runs a very tight, well-managed business. She and her staff have responded to our needs in a very professional and timely manner. Sue will dig into the business details and go back as far as necessary to have a good understanding of how your business operates. If you are seeking an accounting firm that knows the rules and will be a great business partner, I highly recommend Oldenburg.”


“I just wanted to take the opportunity to comment on the matter of the case we both worked on. I want to compliment you on the work you did on this case. You truly did a wonderful job of representing your clients. This was an extremely difficult case and I congratulate you on the work that you and your staff performed. In looking at the history of this case, I am convinced that you probably saved these clients from total disaster. Probably only you and I will really understand the tireless effort that you performed to bring this case to a resolution.” (Tax Attorney)


“I wanted to thank you for persevering at our meeting the other day. I know we bounced all over the place and you were very patient in dealing with the chaos. It is clear that we have lots to do to get our house in order, but I am confident that with your help and guidance, we will get there.”


“Knowing that your team has my back when it comes to my business is of tremendous value to me. Thanks for all you do for us.”

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© Oldenburg Accountants & Advisors
1790 Nations Drive
Suite 215
Gurnee, Illinois, 60031