A fellow in the American College of Trial Lawyers, John Tatum is a partner with HunterMaclean in Savannah, concentrating his practice on business litigation including business torts, contractual and commercial disputes, fraud cases, RICO, ERISA, business governance and financial disputes, intellectual property disputes and class actions.

He served as managing partner of HunterMaclean from 1998 through 2009 while maintaining a full-time law practice. He served as general counsel to Savannah Foods & Industries Inc., from 1988 to 1997, and he served on the board of directors of SunTrust Bank of Savannah from 1988 to 2012. He served on the CEO Council for the Savannah Area Chamber of Commerce and as Clerk of Session for First Presbyterian Church. John currently serves on the board of directors for the Savannah Community Foundation and the Coastal Empire Habitat for Humanity.

He served as vice chair and chair of the Union Mission from 2009 to 2012, when the economy was in shambles and Union Mission's future was uncertain.