The Jefferson Parish School Board learned Friday that the third high-ranking official since the end of January is leaving her job with the school system.

Mary Garton, the chief human capital officer since June 2013, submitted her resignation effective Monday, according to an official school system email Friday. Her interim replacement will be Donna Joseph, the system’s director of recruitment and selection.

Garton declined during a brief telephone call Friday to comment on her reasons.

Her departure follows the retirements of Superintendent James Meza on Jan. 31 and Chief Financial Officer Robert Fulton days later.

Meza’s departure from the school system was long expected. He was brought on as interim superintendent in 2011 and his contract was later renewed.

Fulton retired in early February, around the time the state Legislative Auditor’s Office released an audit that criticized the School Board after an ex-employee was found to have stolen about $75,000 in school activity funds over more than a year.

Michelle Blouin-Williams is the acting superintendent; Elizabeth Smith is Fulton’s interim replacement.

Garton directed “the recruitment, identification and placement of high-performing individuals in all central office-based and school-based positions,” the school system’s website said. She also represented the School Board on all district personnel matters.

Garton’s career in the Jefferson school system began two decades ago as a teacher, her online biography says. She earned a bachelor’s degree from Washington University in St. Louis and a master’s degree in curriculum and instruction from the University of New Orleans.