Mickey Leibner is an associate in the Public Policy, Regulatory & Political Law, International Trade and Cybersecurity & Data Privacy practices in Mayer Brown's Washington DC office. Mickey’s practice centers on helping clients navigate the intersection of regulatory and political matters. He has significant experience before the Committee on Foreign Investment in the United States (CFIUS), whether analyzing transactions to determine if a CFIUS filing is required or recommended, navigating the CFIUS filing process, or negotiating and implementing mitigation agreements.

Mickey also advises a variety of clients in the private, nonprofit and government sectors on a number of political law, campaign finance, and lobbying compliance issues. He helps clients implement internal political law compliance processes, and has helped clients create a range of nonprofit and political organizations. Mickey also lobbies and advocates regularly to US congressional staff and elected officials, and is particularly adept at helping clients navigate interactions with local, state, and federal governments. He has extensive experience developing and implementing winning strategies to achieve clients' goals.

Mickey combines his political experience with his knowledge of privacy and cybersecurity law to help clients navigate the myriad state and federal laws in the area. He assists private companies and trade associations in the ongoing debate around state and federal privacy legislation, helping them navigate and comply with the California Consumer Privacy Act and other proposed state laws while simultaneously developing legislative proposals on the federal level.

Previously, Mickey was the Director of Government Relations at the Moffett Group, where he led the firm's domestic portfolio, lobbied on behalf of international clients and ran the firm's day-to-day operations. In that role, he developed and implemented successful lobbying campaigns for a variety of clients, ranging from the last-minute rescue of the $1.9 billion, 845 MW Shepherds Flat wind project to ensuring that financial regulators focus on the business practices of predatory pyramid schemes. Mickey emphasizes coalition-building to achieve client objectives and strives to bring together unlikely allies to advocate most effectively.

Mickey also worked in Senator Edward Kennedy's Judiciary Committee office during the nomination process of two Supreme Court justices and at MassEquality, where he fought to preserve the rights of same-sex couples in Massachusetts. He has also spent time on a number of political campaigns, including House races during the Democrats' landslide victories in 2006, state House races in the Northeast, gubernatorial races and presidential campaigns. In the fall of 2008 he helped plan and execute the GOTV strategy for the Obama-Biden campaign in Charlottesville, Virginia and at the University at Virginia.


George Washington University Law School, JD

Tufts University, BA, cum laude, Political Science



  • District of Columbia
  • Maryland