GEM Environmental Building Services LTD was founded 20 years ago originally based in East London. We now have offices in Nort ... h London and Canary Wharf and have since developed into one of the fastest growing maintenance companies in London. We provide market-leading solutions and expertise as a managed service to deliver real quantifiable value to business customers. We supply customers of all sizes from major energy users, commercial real estate operators, high street retailers and public sector organisations. Some of the services we provide are commercial and domestic heating, project works, electrical, utilities, system design/delivery and water treatment. GEM is an Independent Gas Infrastructure Provider registered on the Lloyds Register for both domestic and commercial gas installations throughout the UK. read more