Intersys

In Redbridge, London

ISO 27001-certified managed IT support and cyber security services for businesses in London, Essex and the South East.

Visit website Call 020 3005 4440 Write a review Updated 07 Sept 2026

From the provider

Founded in 1996, Intersys is a 50-strong IT support and services provider based in the South East with offices in London (Leadenhall Market), Woodford Green and Cambridge. The company serves over 145 clients including FTSE 100 organisations and SMEs, with particular expertise in financial services, insurance, and fintech sectors.

Intersys provides managed IT support, cyber security services, IT consulting, and cloud infrastructure solutions. The company is ISO 27001 certified and a Cyber Essentials Plus provider, delivering security-focused IT services to highly regulated industries. Their service portfolio includes helpdesk and remote support, on-site visits, cyber security consulting, ransomware recovery, Azure infrastructure, and compliance assistance with frameworks such as GDPR and DORA.

The company maintains a 94% client retention rate and an average client relationship of 8.6 years, serving clients across the UK and internationally.

Services Intersys offers

Managed IT support Day-to-day support, monitoring and maintenance for a fixed monthly fee. Helpdesk and remote support A support desk your staff contact by phone, email or portal when something stops working. On-site support Engineers who travel to your offices for the work that cannot be done remotely. Cyber security Protecting systems and data from attack, and responding when something gets through. Cyber Essentials Preparing a business for Cyber Essentials certification and running the assessment. Microsoft 365 Setting up and running Microsoft 365 email, files, Teams and user accounts. Cloud and hosting Moving servers and applications to hosted infrastructure, then running them there. Backup and disaster recovery Copies of your data held off-site, and a tested plan for getting back to work after a failure. Networking and Wi-Fi Wired networks, Wi-Fi, firewalls and internet connections across your sites. VoIP and telecoms Phone systems that run over your internet connection, including numbers and call routing. Hardware and procurement Buying, configuring and replacing laptops, desktops, servers and peripherals. Compliance and GDPR Meeting data protection and industry rules, including UK GDPR record keeping. Projects and consultancy One-off work such as an office move, a migration or a new system rollout. Co-managed IT Working alongside your own IT staff, covering the gaps rather than replacing them. IT strategy and vCIO Regular planning sessions on budget, risk and what to change over the next year.

Accreditations and partnerships

ISO 27001 International standard for managing information security, audited by a certification body.

Cyber Essentials Plus Cyber Essentials with an independent technical audit.

Microsoft Partner Registered in the Microsoft partner network.

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All IT support in Redbridge

Services Intersys offers

Managed IT support Day-to-day support, monitoring and maintenance for a fixed monthly fee. Helpdesk and remote support A support desk your staff contact by phone, email or portal when something stops working. On-site support Engineers who travel to your offices for the work that cannot be done remotely. Cyber security Protecting systems and data from attack, and responding when something gets through. Cyber Essentials Preparing a business for Cyber Essentials certification and running the assessment. Microsoft 365 Setting up and running Microsoft 365 email, files, Teams and user accounts. Cloud and hosting Moving servers and applications to hosted infrastructure, then running them there. Backup and disaster recovery Copies of your data held off-site, and a tested plan for getting back to work after a failure. Networking and Wi-Fi Wired networks, Wi-Fi, firewalls and internet connections across your sites. VoIP and telecoms Phone systems that run over your internet connection, including numbers and call routing. Hardware and procurement Buying, configuring and replacing laptops, desktops, servers and peripherals. Compliance and GDPR Meeting data protection and industry rules, including UK GDPR record keeping. Projects and consultancy One-off work such as an office move, a migration or a new system rollout. Co-managed IT Working alongside your own IT staff, covering the gaps rather than replacing them. IT strategy and vCIO Regular planning sessions on budget, risk and what to change over the next year.

Questions people ask about Intersys

What services does Intersys offer?

Intersys offers Managed IT support, Helpdesk and remote support, On-site support, Cyber security, Cyber Essentials, Microsoft 365, Cloud and hosting, Backup and disaster recovery, Networking and Wi-Fi, VoIP and telecoms, Hardware and procurement, Compliance and GDPR, Projects and consultancy, Co-managed IT, IT strategy and vCIO.

Where does Intersys provide IT support?

Intersys is based in Redbridge and also serves South East, East of England, Essex, Cambridge, City of London.

Who is Intersys for?

The team is 16-50 people. The company was founded in 1996.

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