Bruce Williamson is an American energy company executive. He is best known as a former chief executive office (CEO) for global markets of North Carolina-based Duke Energy and CEO of Houston-based Dynegy.

Williamson was born in Great Falls, Montana to George and June Williamson, and graduated from Great Falls High School in 1977. He spent his freshman year of college at the University of Idaho, transferred to the University of Montana-Missoula, and graduated with a bachelor's degree in finance in 1981. Further, the former United States Attorney for the Southern District of Texas, Michael Shelby, stated that Williamson becoming CEO, "has changed the standard operating procedures in such a way that honesty and candor [are] part of the business plan," and Williamson "helped ferret out potential wrongdoers." As the CEO of Dynegy, Williamson restructured Dynegy out of bankruptcy, and reduced Dynegy's outstanding debt by over $10 billion. In 2012, Dynegy filed for Chapter 11 Bankruptcy to settle with creditors who held around $2.5 Billion in claims over one of its subsidiaries.

In July 2011, Williamson was named president and CEO of Cleco Corporation, a utility holding company based in Louisiana. In his first year as CEO, he finalized the largest wholesale contract ever entered into for the Cleco Corporation by securing a 10-year contract with Dixie Electric Membership Corporation. In December 2013, Cleco Corp. transitioned into the Midcontinent Independent System Operator Market, with the hope that this will provide additional growth opportunities.

Williamson previously served on the board of directors for Questar Corporation (gas company) and for Southcross Energy. Williamson currently serves on the board of directors for ENMAX. Williamson is also on the University of Houston Dean's Advisory Board for the CT Bauer College of Business and the Chancellor's National Advisory Council.

Williamson and his wife, Kim, live in the Woodlands, TX and have two daughters.