Hiolle Industries is a diversified industrial group organized around 3 areas of activity:
- Railway and Clean Transport (53.8% of net sales): maintenance, after-sale and cabling services (slabs under chassis cabling, slabs under pavilion, driver desks and control cabinets) for the prime contractors as manufacturers, operators and OEMs;
- Services and Environment (44.4%): traditional industrial services (piping, electricity, hydraulic, structural steel, heat treatment, mechanics, metallurgical control and maintenance), transcontinental industrial transfers of turnkey factories, design, manufacturing, installation and maintenance of waste treatment equipments (household waste, ordinary industrial waste and green waste) and grinding lines for useless cars, installation of equipments for smoke and other discharges treatment, engineering services in the field of water treatment;
- Energy (1.8%): activity ensured primarily in the renewable energy with the design, installation and maintenance of photovoltaic solar plants.
France accounts for 83.2% of net sales.