Jeremy Katz, the deputy director of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's National Economic Council (NEC), will leave the White House in January, according to a report in The Washington Post.

Katz's planned resignation is the latest in a series of departures expected at the end of Trump's first year in office. Earlier this month, the White House announced the departure of deputy national security adviser Dina Powell. That was followed days later by the revelation that another senior aide, Omarosa Manigault Newman Omarosa Onee Manigault NewmanTrump hurls insults at Harris, Ocasio-Cortez and other women Pelosi makes fans as Democrat who gets under Trump's skin The Memo: Impeachment's scars cut deep with Trump, say those who know him MORE, had left the administration.

Katz, a former official in the administration of President George W. Bush, was a key player in the White House's efforts to rewrite the nation's tax code. That legislation passed the Senate and the House this week, and Trump signed the measure into law on Friday.

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“Jeremy has been an invaluable partner in the development and execution of the President’s economic agenda, including the successful passage of historic tax reform,” NEC Director Gary Cohn told The Washington Post in a statement.

“He was instrumental in building a strong NEC team, and I’m grateful for the deep knowledge, skills and integrity he brought to his work.”

Katz is leaving the White House on good terms, and had always planned to stay in the administration for only a year, the newspaper reported, citing a White House official.

His family lives in Chicago, and he commutes back weekly.

The passage and signing of the GOP tax overhaul marked a victory for Katz, who was one of a few current officials in Trump's White House with prior West Wing experience.

“Jeremy has been a deeply valued member of the White House staff, especially with regard to his support of the President’s economic policies,” chief of staff John Kelly John Francis KellyMORE said in a statement to The Washington Post. “I will miss his dedicated service, strong character, and extensive experience, and we wish him well in future endeavors.”