William McRaven, the retired four-star admiral who lead U.S. Special Operations Command from 2011 to 2014, has resigned from the Pentagon’s technology advisory board following a public critique of President Donald Trump, Defense News has learned.

McRaven resigned from the Defense Innovation Board, a group of technology leaders and innovators tasked with advising the secretary of defense on pertinent issues, on Aug. 20, four days after he posted a scathing op-ed in the Washington Post calling out Trump for revoking the security clearance of former CIA director John Brennan…

McRaven becomes the third of the original announced members of the board to drop off. Amazon head Jeff Bezos, a frequent target from Trump, was announced as part of the DIB when it launched. However, the Post reported earlier this year that Bezos never actually took a seat on the board. And Cass Sunstein, a top adviser to President Barack Obama who had attended several meetings of the board early on, is also no long listed as part of the group on its website.