Senior Vice President Phil Smith will take over operations and engineering role on an interim basis.
Commission is now at four members after former chairman’s death.
GTI announced the death of Edward “Eddie” Johnston, who passed away on Dec.20, 2018, after a valiant year-long battle with a rare form of cancer.
The legendary oilman died on Nov. 9 while at his beloved ranch, Ucross, outside Sheridan, Wyo. He was 96.