One of presumptive Republican nominee Donald Trump’s campaign aides resigned on Friday, after having worked for the New Yorker since mid-June.

According to Politico, Trump’s former director of surrogates, Kevin Kellems, recalled his “brief” time with the campaign as an “interesting experience.”

“To whom it may concern: I hereby resign my appointment as Director of Surrogates for Mr. Trump,” Kellems reportedly wrote in a note acquired by Politico.

While brief, it has been an interesting experience, and am proud of the contributions made through our early-phase project endeavors. Also have enjoyed meeting some fine and dedicated individuals throughout the organization. Look forward to running across several of you going forward.