A top Justice Department attorney who has defended some of the Trump administration’s most politically and legally contentious cases is set to leave the department later this month after facing off against the nation’s most prominent appellate advocates.

Abhishek Kambli, a deputy associate attorney general who has been working under acting Attorney General Todd Blanche and previously under Pam Bondi, announced Thursday that he will depart the DOJ at the end of May after roughly 15 months. However, his leave will only come after he finishes oral arguments in two major showdowns over President Donald Trump’s executive authority.