Gareth joined the business in the mid 1990s, following four years as an engineer for firms based in Bath, Manchester and Liverpool. He joined as Business Development Manager, a position he held for 15 years. Alongside his role, he learned the 'business' ropes from his father Lawrence – the then Managing Director. He took over in 2010 as MD himself and leads the business today. Gareth has overseen substantial growth over the last ten years, taking the company to where it is now. He is responsible for strategy, business growth and ensuring the future proofing of HE Simm for the next generation.
In 2020, after integrating the family businesses of HE Simm, HESIS and Aspen Thorn, Gareth became the CEO of the HE Simm Group of companies.