Complex sentence: The company is headquartered in Cuffley, Hertfordshire and has manufacturing plants in Sittingbourne, Kent and Treherbert, Wales and employs its own product development team, design team, installation team and sales team.
Split into simpler sentences: The company is headquartered in Cuffley, Hertfordshire and has manufacturing plants in Sittingbourne, Kent and Treherbert, Wales. Everest employs its own product development team, design team, installation team and sales team.