AUSTIN, Texas (AP) — The head of Texas’ sprawling health agency is resigning in the wake of it botching millions of dollars in contracts.

Republican Gov. Greg Abbott announced Thursday that Charles Smith, his longtime aid, was leaving his post as executive commissioner of the Texas Health and Human Services Commission at the end of the month.

READ MORE: Police From All Over Rally To Lift Spirits Of North Texas Child Battling Cancer

Charles Smith (Texas Health and Human Services Commission)

Officials discovered last month that staff members incorrectly scored five managed care contracts worth an estimated $600 million.

The State Auditor’s Office released a subsequent report highlighting problems with the agency’s procurement processes.

READ MORE: 1-Year-Old Dallas Boy At Center Of Amber Alert Found Safe

Smith is the latest of several top agency officials to leave.

Abbott recently tapped former state Sen. Tommy Williams to help correct the agency’s contracting mistakes.

The governor said Williams will now lead it on an interim basis beginning June 1.

MORE NEWS: State Fair Of Texas Welcomed 2.2M Visitors During 24-Day Run

(© Copyright 2018 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)