Sarah Miller was appointed general counsel of Williams, the company said June 22. The role became effective June 20, and the board of directors confirmed it.

Miller replaced Craig Rainey, who retired, as leader of the natural gas infrastructure company’s legal team. She will report to Alan Armstrong, president and CEO.

In March, she became interim general counsel, and previously was vice president, corporate secretary and assistant general counsel for the corporate secretary team.

Miller joined Williams in 2000, and has also been senior counsel for the company’s midstream business, and senior attorney for the legal department’s business development team. Prior to joining Williams, Miller was a litigation associate at Crowe & Dunlevy.

She has a law degree from Oklahoma City University and a bachelor’s degree from Oklahoma State University.

“Sarah provided strong leadership while serving in the interim general counsel role and, throughout her career at Williams, she has consistently demonstrated her ability to deliver sound legal counsel, especially during periods of growth and change,” said Armstrong. “I look forward to having Sarah on our executive officer team to help lead Williams toward our goal of becoming North America’s leading natural gas infrastructure provider.”

Williams is based in Tulsa, Okla.