Pardee is in his current position since 2019. From 2013 to 2017, he was EVP and COO of the Tennessee Valley Authority. Prior to TVA, he was COO of Exelon Generation. At the same time he served as chairman of Constellation Energy Nuclear Group, an Exelon subsidiary. He served as president and chief nuclear officer of Exelon Nuclear. He is currently a member of the Nuclear Safety Advisory Board of Tokyo Electric Power Company.