Mr. Shaub will leave the agency in this month to take up his new position as a senior director for ethics at the Campaign Legal Center in Washington, a nonpartisan group that advocates campaign finance reform and litigates voting rights cases.
".@realDonaldTrump Brovo! Only way to resolve these conflicts of interest is to divest".
The Director of the Office of U.S. Government Ethics announced his resignation on Thursday.
Shaub said his work at the Campaign Legal Center will focus on government ethics, including at the congressional and state level.
Since Donald Trump's election, Shaub has frequently clashed with his team over questions of conflicts-of-interest, routinely chastising the president and his aides for openly violating ethics rules. He conceded, however, that in this administration, "It's clear that there isn't more I could accomplish", he said. Later, the White House backed down.
Unlike predecessors, Trump has retained his ownership interest in his businesses and is not using a blind trust.
The Office of Management and Budget had tried to block Shaub's request for copies of the waivers, prompting him to pen a scathing 10-page letter refusing to back down, writing that the OGE expected federal agencies to comply with the request. But Shaub, a Barack Obama appointee who joined the ethics office as an attorney under the George W. Bush administration, struggled to connect with the Trump transition team after the election.
Nonetheless, Shaub, whose term was set to end in 2018, persisted in trying to do his job, becoming something of an unlikely bureaucratic hero.
Walter Shaub Jr.'s resignation is effective as of July 19, he wrote in his resignation letter. They showed 17 appointees had been granted waivers to ethics rules to allow them to serve in the White House, including four lobbyists. The White House Counsel's Office disagreed and took no disciplinary action.
The White House, however, said Conway was acting "without nefarious motive" and deserved no punishment.
Shaub's office also tussled with the White House over the release of ethics waivers the administration had given its staff.
In an interview with the Washington Post published at the same time, Shaub said he hadn't been pressured out of the position, but that he felt he had done as much as he could within the limitations of the office.
OGE pushed out more waiver information in June.
In contrast, OGE "has no investigative authority, so we're limited as to what we can do if these waivers are not being released publicly", he said.