Mr. John Zimmerman CPA

Director, Castro & Company

John Zimmerman, CPA is Castro & Company’s Director for Advisory and Accounting Services. John’s entire 24 year career has been supporting the Federal government with financial management activities and John has experience in the majority of the CFO Act agencies as well as many smaller agencies. His areas of expertise including financial transformation, business process re-engineering, OMB Circular A-123, and designing unique, efficient, and effective solutions for his clients to quickly resolve their issues. Mr. Zimmerman received a Bachelor of Business Administration (Accounting) and a Master of Science in Accounting from James Madison University.


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