Williams has appointed Micheal G. Dunn executive vice president and COO, effective Feb. 27. Dunn will report to CEO Alan Armstrong. Dunn most recently served as president of Questar Pipeline and executive vice president of Questar Corp. From 2010 to 2015, Dunn served as president and CEO of PacifiCorp Energy, a multi-state regulated electric power generating company and a subsidiary of Berkshire Hathaway Energy. Dunn graduated in 1988 from the University of Oklahoma with a bachelor’s degree in civil engineering. He is a registered professional engineer in the state of Oklahoma. Dunn began his career with Williams as an operations engineer and spent 14 years with the company in a variety of technical and leadership roles.