Galloway vowed to protect personal data during the Monday ceremony, which made her appointment by fellow Democrat Gov. Jay Nixon official.
Galloway will replace Republican Auditor Tom Schweich, who fatally shot himself Feb. 26. She will serve the remainder of Schweich’s four-year term, which began in January. Longtime Nixon chief of staff John Watson had served as auditor while the governor searched for a permanent replacement.
Nixon first appointed Galloway as Boone County treasurer in 2011 following the death of Treasurer Jan Fugit. She was reelected the next year.