GMG appoints new & highly experienced COO & Chief Officer GMGs new COO & Chief Health Safety, Environment, Quality, Risk and Sustainability Officer are two solid hires - Roobottom has extensive experience having worked in the oil and gas manufacturing industries for ~30 years in a number of roles and Mackintosh with 20+ years of experience in the Health, Safety and Environment industries having worked for large organizations in the mining, energy, manufacturing and oil and gas industries.