London never stops – and neither do we. Get dynamic, cyber-secure IT from a provider that meets the demands of highly regulated industries. Based in the City. Serving all of the Capital

Since 1996, ISO 27000-certified Intersys has helped organisations across the Capital grow through exceptional IT. From our London IT headquarters in Leadenhall Market, EC3V, we serve clients right across the City with Security First MSP services, cyber security and digital transformations.

As a leading London IT company, we bring the vision and dynamism to transform your performance, and the sector-specific knowledge to keep highly regulated businesses compliant and secure. It's why we deliver IT for financial services, cyber secure solutions for life sciences, and MSP services to the (re)insurance industry – among many other sectors.

We currently provide IT services in London to over 100 clients. Our retention rate is 94% compared to 77% across the industry. And our average length of client relationship is a lengthy 8.6 years.

Work with Intersys and you can rely on a London IT company that delivers fast-response MSP, cyber security and comprehensive IT services.

You’ll find our office at 1st Floor, 29/30 Leadenhall Market, City of London, EC3V 1LR, adjacent to the Lloyd’s Building. Intersys’ offices are within a 10-12 minutes’ walk of Underground stations at Bank/Monument, Liverpool Street, Aldgate and Tower Hill. Mainline rail stations less than a 10-minute walk away include Liverpool Street, Fenchurch Street and Canon Street. Nearby bus stops and services are available from Bishopsgate, Gracechurch Street and Liverpool Street Bus Station.

We serve all of these major business centres in London: The City of London (Square Mile); Canary Wharf; West End/Mayfair; King's Cross & St. Pancras; London Bridge & Shard Quarter; Stratford/Olympic Park, Paddington Basin, Victoria, White City, and more. If you are within the M25, we are your nearby IT partner!