White House senior counsel Paige Herwig, who has been a driving force behind President Joe Bidens success in diversifying the nations federal courts, is leaving her post.

Herwig is headed to another role in the administration, HuffPost has learned. She will be making the move in the next several weeks.

Herwig has been in the counsels office since day one of Bidens presidency, making her the longest-serving team leader there. Shes a big reason why Bidens judicial nominations are among his signature accomplishments. Shes been overseeing the White Houses aggressive strategy for selecting, nominating and confirming his judges.

The president has confirmed 126 people to lifetime federal judgeships during his tenure, which is more than his three predecessors Donald Trump (104), Barack Obama (83) and George W. Bush (124) had confirmed by this point in their presidencies.

This includes 93 district court judges, 32 appeals court judges and one Supreme Court justice, Ketanji Brown Jackson.

Paige is a phenomenal lawyer, leader, and person, who led the nominations team in Counsels Office with the utmost grace and skill, said former White House counsel Dana Remus, who served with Herwig for most of her tenure.

Beyond sheer numbers, Biden has infused badly needed diversity onto the nations mostly white, mostly male federal bench. Sixty-six percent of his nominees are women, and 70% of the judges who have been confirmed are women. Sixty-five percent of his nominees are people of color, and 64% of the judges that have been confirmed are people of color.

Paige is the unsung hero of one of the administrations most critical achievements appointing a record number of federal judges with record diversity by race and gender and professional experience, said former White House chief of staff Ron Klain, who also served with Herwig for most of her tenure. None of this would have happened without Paiges legal acumen and legislative savvy.

Herwigs legwork has also led to a number of historic firsts in terms of who Biden has put onto the courts. These include the first Muslim American federal judge, the first two openly LGBTQ women to serve as U.S. circuit court judges, a spike in Hispanic and Asian American representation on the courts, and 12 Black women being confirmed as circuit court judges more than all past presidents combined.

Thats in addition to Biden confirming a record number of public defenders to circuit court seats, a shift from the more traditional corporate lawyers tapped for these jobs.

When the history books are written, Biden will get credit for putting these people into lifetime seats on the federal bench. Democrats may get a footnote for confirming them in the Senate. Herwig probably wont be mentioned at all. But shes been leading the behind-the-scenes work of picking and vetting all of them in the first place, and lining up public support for these people so theyll have a (hopefully) smooth path ahead in the Senate from the moment the president makes their nominations official.

Paige is equal parts brilliant and relentless, said White House chief of staff Jeff Zients.

From day one of the Biden-Harris transition, Paige crafted an aggressive strategy to confirm the most diverse and impressive judicial nominees in history, he continued.