 Liedtke served as the president of Pennzoil from 1967 to 1977.In 1977, he left Pennzoil to lead the company's spin-off Pogo Producing Company.Previously known as Pennzoil Offshore Gas Operators at its IPO in 1970, Pogo was an exploration and production subsidiary of Pennzoil set up to look for natural gas in the Gulf of Mexico.