(CNN) Kelly Hoggan, the Transportation Security Administration's assistant administrator for the Office of Security Operations, has been removed from his position in the wake of congressional scrutiny.

The change was announced Monday night by the House Oversight Committee's official Twitter account.

UPDATE: Kelly Hoggan has been removed from his position as head of security at TSA, following our hearing on May 12 on mismanagement at TSA. — Oversight Committee (@GOPoversight) May 23, 2016

"UPDATE: Kelly Hoggan has been removed from his position as head of security at TSA, following our hearing on May 12 on mismanagement at TSA," the committee tweeted.

The House Oversight Committee conducted a hearing on TSA's operations on May 12. At the hearing the TSA Administrator, Peter Neffenger, was questioned why Hoggan was given $90,000 in bonuses when security lines were not improving.

His agency is on the defensive after three former TSA employees testified that they were retaliated against after "directed reassignments," where employees who have highlighted wrongdoing within the administration are shifted to other assignments.

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