G. Craig "Chip" Nelson Jr. has been named Midwest regional sales manager for the George E. Failing Co., Enid, Okla., a leading manufacturer of rotary drilling equipment. According to Aaron Harmon, vice president of domestic sales for GEFCO, Nelson will be responsible for sales and marketing operations in the central/midwest region of the United States. Currently, Nelson also is chairman of the heavy equipment group of the National Groundwater Association.