Critical Environments

Fire and security for critical environments

Protecting sites that keep the UK running

A fire or a security breach can be more than a disruption for a critical environment. If a data centre, plant room or power station goes down, the knock-on effects can bring everything from industry to communications to a halt.

 

With Mitie, you can protect and secure every aspect of your critical infrastructure. Our fire and security services are delivered by specialist engineers, tailored to the complexities of your environment and supported by 24/7 monitoring and response.

Proven Experience. Real Scale.

We provide fire alarm systems and ongoing support across healthcare, education, logistics, retail, commercial property and more — combining technical expertise with dependable delivery.

40+ years

Delivering fire safety solutions

7,600+

Customers across the UK

800+

Professional Specialist Engineers

Nationwide

Teams are based across the UK

A structured approach to complex protection

Our end-to-end fire and security services deliver safety, security, compliance and unified protection for peace of mind.

Our Fire and Security Solutions for Critical Environments

Mitie provides a full suite of fire and security services — from installation to maintenance — to keep your system safe, secure, and compliant. 

Sensitive information. Critical national infrastructure. The power that drives businesses and industry. All governed by high uptime demands, tight legislation and very little margin for error.

We’ll design and implement fire and security measures bespoke to your needs and risks, so you can protect people, assets and vital equipment.

Whether you need to adhere to government legislation, British Standards, or sector-specific regulations, we’ll incorporate those requirements into your design. That includes specialist equipment needs, such as aspirating smoke detectors or facial recognition systems.

With clear documentation for every piece of equipment and connected technologies for constant, centralised monitoring, it’s never been easier to audit your fire and security system.

Bring in the experts, wherever your sites are

Critical environments require specialist skills. Our experts are highly trained and fully accredited, with decades of experience in complex projects.

And with a team of over 800 engineers across the UK, we can self-deliver for all your facilities – even if they’re at opposite ends of the country.

Stay ahead with the latest fire and security innovations

We’re always researching and developing new ways to prevent fires, deter criminals and protect our customers.

Our vendor-agnostic approach means we can combine all the best measures into a cutting-edge fire and security solution. And we’ll partner with you to regularly review and improve your strategy.

Total protection covering all your needs

Fire Protection

Our comprehensive range of systems and end-to-end specialist support provides everything you need to identify and mitigate fire risks and protect what matters most.

Security Systems

Combining the latest digital tools with tried and tested physical measures, our security solutions are intelligence led and expertly delivered.

Monitoring Solutions

Our around-the-clock monitoring services are designed to protect your people, assets, and places from fire, theft and vandalism.

Take control of your fire and security strategy

Get started with a full assessment of your critical environment. Share your challenges and goals and we’ll show you how our fire and security services can help you keep critical infrastructure running safely.

Scroll to Top

Customer Area

A dedicated space for accessing forms, scheduling services and finding essential information.

Request a

Maintenance Visit

Plan and schedule routine maintenance at a time that suits your business, ensuring continued compliance and minimal disruption.

Request a

Reactive Call Out

Report an issue and arrange a rapid response from our engineers to keep your systems operational and compliant.

Update

Your Details

Keep your contact and site information up to date so we can deliver accurate service and communication.

Request an

Appointment

Arrange a site visit or consultation with our team at a convenient time for you.

Request a

Quotation

Get a tailored quote for services, upgrades or new installations based on your requirements.

Leave

Your Feedback

We value your feedback. Let us know how we did or how we can improve — your input helps us deliver a better service every time.

We're Here To Help

Need Something else?

If you can’t find what you’re looking for, our team is ready to assist. Get in touch and we’ll point you in the right direction quickly.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.

Copyright ©2026 Mitie. 

Part of Mitie Group plc. All Rights Reserved.