Coterra Energy Inc., Houston, has made management changes. Blake Sirgo has been promoted to senior vice-president, operations, effective Oct. 1, 2022, replacing Steven W. Lindeman who will retire effective Sept. 30 after 40 years with the comapny. Sirgo has been with the company since 2008, most recently serving as vice-president, operations.
Gary Hlavinka has been promoted to vice-president, Marcellus business unit, to replace Phillip L. Stalnaker, who will retire Sept. 30 after 22 years with the company. Hlavinka has a 33-year career with Coterra, the last 13 of which were served in the Marcellus business unit, most recently as operations manager.