Greene's Energy Group Names Boutwell Manager, Technology and Business Development -Rental & Products. Greene’s Energy Group (GEG), a provider of integrated testing, rentals and specialty services, has named Doyle Boutwell as Manager, Technology and Business Development – Rental & Products, announced Frank Mathews, President – Rental & Products. Based in Houston, Boutwell will be responsible for the management of strategic and ongoing product development, emerging technologies and related business integration. Additionally, he will assist various business units with project management.