Gregory Garth Greenfield was born September 20, 1952 at Mitchell, SD to Marion and Martha (Highland) Greenfield. He attended Goodwin School through eighth grade and graduated from Mitchell Senior High School in 1970. He graduated from South Dakota School of Mines and Technology in December 1974 with a degree in electrical engineering. He worked for Caterpillar in Peoria, Illinois for many years.
He is survived by a sister, Kandee Strand and husband, Duane, Mitchell, SD; a brother-in-law, Doug O’Neill and wife, Mary of Brookings, SD; nieces: Heather Lathrop and husband, Kevin, Sioux Falls, SD: Brittany O’Neill and Laurel O’Neill of Brookings, SD, Kari Bolt and husband, Lyndon, Rapid City, SD; nephews: Erik O’Neill and wife, Ann and Sean O’Neill of Brookings and Jaimie O’Neill and wife, Becky of Sioux Falls, SD.
He was preceded in death by his sister, Demetra O’Neill, his parents and grandparents, John and Clara Greenfield and Grover and Eva Highland.