Elizabeth Mahony, a former deputy of new Massachusetts Gov. Maura Healey, has been picked to lead the state’s Department of Energy Resources.

Mahony was an assistant attorney general focusing on energy and telecommunications when Healey was Massachusetts’ attorney general, working in that office since 2015. She also previously spent three years at DOER as general counsel.

“I’ve worked with Elizabeth for many years,” said Energy and Environmental Affairs Secretary Rebecca Tepper, who also joined the Healey administration from the AG’s office, where she was energy bureau chief. “I’ve seen her in action, thinking up creative solutions to complex problems and delivering real results for the commonwealth. Elizabeth will be at the epicenter of our clean energy transition, and I know she will prioritize ratepayers and advance equity in everything she does.”

Mahony has worked closely with the solar and wind industries, as well as with environmental groups and on environmental justice issues such as the Merrimack Valley gas explosions.

She’s also a veteran of the ISO-NE process, working for years on the grid operator’s Consumer Liaison Group, most recently as chair of the coordinating committee, a position she took up a year ago. (See “Leadership Change,” Overheard at ISO-NE Consumer Liaison Group: March 10, 2022.)

“I’m thrilled to be returning to the Department of Energy Resources to continue the important work of achieving the commonwealth’s bold clean energy goals,” Mahony said in a statement.

“We will be intently focused on preparing our grid for this transition; updating our housing stock for electrification; encouraging more solar, storage and wind; and creating a fertile ground for the clean technology economy to flourish — all while centering environmental justice communities in the work,” she said.

She will replace Patrick Woodcock, who has served as DOER commissioner since December 2019.