Grissom, a native of Hickman, Kentucky, brings nearly twenty years of co-op executive experience to his role heading JPEC, which serves about 30,000 consumer-members in six western Kentucky counties. Grissom comes to JPEC after serving three years as Chief Executive Officer and President at Pennyrile Rural Electric Cooperative Corporation in Hopkinsville. Prior to that, Grissom was President and Chief Executive Officer of Hickman Fulton Electric Cooperative in Hickman, Kentucky since November, 2000. He is a graduate of Murray State University and of the Management Internship Program of the National Rural Electric Cooperative Association. Greg is the former Chair of Fulton/Hickman County EDC and former Vice Chair of Southwest Kentucky EDC.

Grissom and his wife, Denise, have two children. Their daughter, Anna Gregory, is a junior at Murray State University. Their son, Greyson, is a sophomore at Trigg County High School.

Grissom is a board member of the Kentucky Association of Electric Cooperatives, United Utility Supply and Federated Rural Electric Insurance.