Capstone Green Energy Corp. Darren Jamison has resigned as president, CEO and board member after 16 years effective Aug. 22.

Robert C. Flexon, Capstone’s board chair, was appointed executive chairman of the board and will serve as interim CEO until a successor is appointed.

Denise M. Wilson was appointed lead independent director of the board. John J. Juric, who joined Capstone as CFO in March 2023, will continue in his role.

“My immediate focus will be improving the company’s financial health to better and more consistently serve our customers, suppliers and other key stakeholders of Capstone.” Flexon said in a press release.

Flexon brings years of industry experience to his interim role, as he is currently board chair of PG&E Corp. as well as serving on the ERCOT board of directors. Before then, he was president and CEO of Dynegy Inc. for seven years. Prior to that, he served as CFO of UGI Utilities, CEO of Foster Wheeler and CFO and COO of independent power producer NRG. Flexon has served on the Capstone board since 2018 and served as non-executive chairman since January 2021.