Nicholas Machen is an accomplished tax attorney with extensive experience in various legal and financial roles. Machen served as the DTAP Coordinator at the Manhattan District Attorney's Office from July 2007 to June 2010 before gaining further expertise at the United States Court of Appeals for the Fifth Circuit as an extern in 2012-2013. Nicholas held multiple senior positions at Citi, including Tax Counsel, Head of Tax for Markets and BCMA, Head of Tax for ICG, and Global Head of Business Tax Advisory, culminating in a Managing Director role from January 2023 to October 2025. Since October 2025, Machen has been a Managing Director at Jefferies. Nicholas's academic credentials include a Doctor of Law (JD) from Tulane Law School and a Bachelor of Arts in Philosophy from Harvard College.
This person is not in the org chart
This person is not in any teams
This person is not in any offices