Candeto, who also will coach B-backs, was Georgia Tech's assistant director of football operations in 2016. He spent three seasons as the head coach at Capital University, a Division III school in Columbus, Ohio. He was an assistant at The Citadel from 2011 to 2012.
The 34-year-old Candeto replaces Bryan Cook, now the offensive coordinator at Georgia Southern.
Johnson said Candeto brings a familiarity of Georgia Tech's spread-option offense "as a coach and a player."