William B. Mack focuses his practice on government affairs, government investigations, environmental law, and regulatory and compliance matters. William is experienced in government and politics at the federal, state and local level. He is also experienced in advising companies on regulatory and compliance matters relating to the Securities and Exchange Commission regulations, the Exchange Act, Anti-Money Laundering laws and Financial Industry Regulatory Authority (FINRA) rules.
Prior to joining the firm, William was a Principal Counsel for Enforcement at FINRA. Before FINRA, He was the Director of the Executive Secretariat in the Office of the U.S. Trade Representative. William also served as a Deputy Associate Counsel at the White House, advising primarily on appointments and investigations. Before the White House, he practiced at large firms in New York. William clerked for Judge Robert L. Carter in the Southern District of New York.