Amplify Energy Corp.’s interim CEO, Martyn Willsher, will permanently assume the positions of president and CEO, the Houston-based E&P company said among a flurry of executive appointments announced Jan. 21.

Willsher has worked for Amplify and its predecessor companies since 2012. He had previously been promoted to CFO of Amplify in 2018 and also served as interim CEO since former CEO Ken Mariani’s planned retirement in April 2020.

On Jan. 21, Amplify also promoted Jason McGlynn to senior vice president and CFO from his previous role as vice president of business development. Additionally, Chris Hamm, Amplify’s current lead director, was appointed chairman of the Amplify board. Hamm is a 27-year veteran of the investment management industry and CEO of Axys Capital, an SEC-registered private investment fund manager he founded in 2009.

In a statement commenting on Willsher appointment, Hamm said: “On behalf of the board, I would like to congratulate Martyn on his promotion to president and CEO of Amplify and welcome him as a member of the board of directors.”

“Martyn did a fantastic job guiding the company through numerous challenges during 2020 and has proven he is the right person to lead Amplify moving forward,” he continued in the statement on Jan. 21.

David Proman, a managing director and a partner of Fir Tree, had previously served as chairman of the Amplify board since November 2018. He will continue to serve as a board member, according to a company release on Jan. 21.

Amplify Energy is an independent oil and natural gas company engaged in the acquisition, development, exploration and production of oil and natural gas properties.

In 2019, Amplify completed an all-stock combination with Midstates Petroleum Co. Inc. estimated to be worth $512 million. Upon closing of the merger, Amplify’s portfolio included long-lived, low-decline assets focused in Oklahoma, the Rockies, offshore California, East Texas, North Louisiana and South Texas.