Charles Tzinberg has served clients and small businesses as a CPA since 1983. Over four decades, he helped shape Tzinberg & Associates, P.C. into a firm known for personal service, trusted advice, and lasting relationships.

On July 31, 2026, Charles transitioned ownership and leadership of the firm to Christi Geggus, CPA, who became Managing Principal. Charles remains actively involved as Senior Advisor. He continues to work with clients and support Christi and the team as he gradually transitions toward retirement over the next five years.

Charles’ experience includes tax preparation, financial statement review, and helping clients navigate complex financial and tax matters. He has also kept the firm among the most technically advanced, using the best tools available to support our clients.

Beyond the firm, Charles has served on the CPA Advisory Board of SageWorks, Inc., the Thomson Reuters Advisory Board, and as president of the Accountants Advanced Marketing Network. He was also an original member of the RootWorks Academy. He has shared his experience as a speaker at Thomson Reuters user conferences and events for the Illinois State Bar Association and the Missouri Society of CPAs.

Charles is proud of the firm’s history and grateful for the clients and colleagues who have been part of it. He looks forward to continuing those relationships while supporting Christi as she leads the firm into its next chapter.

Outside of work, Charles enjoys time with his family as a father and grandfather. He is also a car racing enthusiast, a Chicago Marathon finisher, and a first-place trophy winner in Motocross.