Dan has held senior positions across multiple Presidential administrations. From 2022 to 2025, Dan served as the General Counsel of the Office of Management and Budget. In this role, Dan was the lead attorney for the Executive Branch on issues involving federal appropriations and federal funding. He ensured compliance with laws such as the Impoundment Control Act, and he oversaw the Biden administration’s revisions to the Uniform Grants Guidance, including revisions to the circumstances in which agencies may terminate grants. Dan was also one of the lead Executive Branch attorneys on administrative law matters, with his team reviewing nearly all significant regulations across the Executive Branch for compliance with the Administrative Procedure Act.

Prior to being OMB General Counsel, Dan served in the Biden administration as General Counsel of the White House Office of Administration and Special Assistant to the President. During the Obama administration, Dan was an Associate Counsel in the White House Counsel’s Office.

Dan practiced for over five years as a trial and appellate litigator at a large law firm in Washington, D.C. In a rarity for big law, Dan was on the plaintiff-side for a large portion of his cases, including several where he successfully served as trial counsel in bench trials. He also handled numerous appeals, highlighted by two victories before the U.S. Supreme Court. Several suits that Dan helped lead had enormous public impact, including landmark partisan gerrymandering litigation in Pennsylvania and North Carolina that pioneered the strategy of challenging gerrymandered districts in state court under state constitutions.

Dan clerked for the Hon. A. Wallace Tashima on the Ninth Circuit, and the Hon. Naomi Reice Buchwald in the Southern District of New York. Dan graduated from Harvard Law School, magna cum laude, and from Yale College, magna cum laude.