GH was formed in 1984, and employs over 360 engineers and consultants in 18 countries. It has acted as an engineering consultant for banks or owners for over 22 gigawatts (GW) of wind farm capacity around the world, and has also carried out energy assessments totalling over 100GW. GL employs around 6,400 engineers in 80 countries across all areas of its business, which are mainly focused on the oil-and-gas and shipping industries.