John Zimmerman

John Zimmerman is a seasoned professional in Federal Financial Management, currently serving as Principal at Castro & Company since February 2018, where leadership is provided in pursuing and managing advisory engagements. Previous roles include Director at McConnell & Jones CPAs, overseeing federal assurance services, and Senior Manager positions at both Ernst & Young and Deloitte Consulting, focusing on consulting within the federal government. Early in their career, John held a managerial role at BearingPoint and served as an Auditor with the Naval Audit Service. John holds a BBA in Accounting from James Madison University, graduating in 1996.