Fast, reliable Reactive Maintenance


24/7 in-house helpdesk and local engineers nationwide, resolving emergencies fast and reducing operational downtime.

Why Reactive Maintenance minutes matter

Unplanned failures can disrupt safety, comfort and trading. When they happen, minutes matter. Our 24/7 in-house helpdesk logs every alert in real time, assesses the issue and dispatches an appropriate CMSL engineer. You get fast attendance, clear communication and full visibility from start to finish, so operations recover quickly and safely.

Our core Reactive capabilities

Our in-house, fully certified engineers cover every major technical discipline:

  • Mechanical plant and HVAC fault resolution
  • Electrical systems and emergency lighting repairs
  • Plumbing, drainage and water hygiene fixes
  • EV charge points and catering equipment support

Each call-out benefits from our Local-for-Local model. Engineers based near your facilities reduce travel time, lower emissions and deliver genuine community support.


Our five-step Reactive process

Alert and Log

Our 24/7 helpdesk captures your call or system alert in WOM, creating a live ticket with full visibility.

Assess and allocate

Using asset data and fault history, we review the issue, set priority levels and assign the right engineer.

Deploy and diagnose

A local CMSL engineer arrives fully equipped, diagnoses the fault and completes repairs safely on site.

Document and close out

Photos, readings and client sign-off notes are uploaded immediately, providing a transparent audit trail.

Feedback to PPM

Recurring issues or improvement opportunities are integrated into your planned maintenance to reduce future risks.

Why clients trust CMSL

Clients trust CMSL because our reactive service restores normal operations quickly, safely and with minimal disruption. There is one number, 24/7, with real people on the line, not a robot. Issues are logged and assessed immediately, and local engineers who know your sites, access routes and critical plant arrive faster and resolve faults with fewer return visits.

Our reactive service delivers measurable results:

  • High first-time fix rates by dispatching the right engineer with the right skills, not just the nearest
  • Strong SLA performance across major portfolios, including fast attendance and resolution times
  • Reduced downtime through accurate triage and clear escalation routes
  • Transparent updates with photos, readings and timestamps for every job
  • Consistent safety standards through RAMS and point-of-work checks

Every call-out follows a proven, accountable process: the alert is assessed by our in-house

Every call-out follows a proven, accountable process: the alert is assessed by our in-house helpdesk, the most appropriately skilled engineer is dispatched immediately, and you receive an ETA, arrival confirmation and close-out summary. Open KPI reviews and straightforward commercials mean no surprises, just reliability and a service you can trust to keep your buildings running smoothly.

Sustainability in action

Every reactive visit is also an opportunity to improve efficiency. Our engineers adjust control settings, repair inefficient components and reprogram lighting schedules to cut energy waste. We are also assessing our own carbon footprint through accredited partners and exploring offset initiatives from tree planting to seagrass restoration. Each call-out helps build a more sustainable maintenance model, where fast response and responsible delivery work hand in hand.

Recent case studies

What our clients say

CMSL couldn’t have handled it better. The Helpdesk and Out of Hours Helpdesk were quick to respond during a recent out of hours callout, and the reactive communication since has been clear, professional, and consistent.

Adam Mayes, Facilities Manager, Cambridge Central Mosque, Cambridge
I can highly recommend Cambridge Maintenance Services from my experience working with them at 55 Bishopsgate. We had a three-man static team along with various subcontractors, and I also used their mobile services at Eldon House and 4 Moorgate. 

Their engineering advice is solid and reliable, and you can tell that the account managers have hands-on experience, which really supports the site teams. They are quick to respond to reactive issues and have never missed a KPI at my managed building. 

Cambridge Maintenance Services also has a large pool of specialist subcontractors. They were able to select the right contractors to suit the tenant's needs, and they have excellent cover for annual leave and sickness. Paul Younan in particular has been helpful in identifying problem areas and offering solutions that provide real value, including advice on energy-saving devices. 

Christian Kleidon, Associate Director – Surveying, MAPP
We recently faced a challenging situation at our Torquay site, and CMSL delivered outstanding support. From the moment they became involved, the team took full ownership, coordinated the required works, and ensured everything ran smoothly on site. The issue was resolved efficiently, disruption was kept to a minimum, and communication throughout was clear and reassuring. Exactly what you want from a facilities partner when it counts.
Kevin Turner, Senior Facilities Manager LSH

CMSL provide quick, proactive support that feels like an extension of our own team. Since the contract changeover we have had consistent communication, confident guidance during urgent incidents, and dependable cover when it mattered. The service is responsive, practical, and shows real care for the building and its occupiers. CMSL have built strong relationships on site and their reliability gives us peace of mind. 

Louise Allen, Building Manager, Bellrock Property & Facilities Management (The Spark)

Since starting my new role at Crossgates in January, I’ve been hugely impressed with the support received from CMSL. Sarah Hodgson, in particular, has been an incredible help—always professional, approachable, and quick to provide the information and assistance I need when booking jobs. Her support has made a real difference for both myself and Ian at Crossgates. A huge thank you to Sarah and the CMSL team.

Nicola Boycott, Facilities Coordinator, Crossgates Shopping Centre (Leeds}

“We recently faced a challenging situation at our Torquay site, and CMSL delivered outstanding support. From the moment they became involved, the team took full ownership, coordinated the required works, and ensured everything ran smoothly on site.

The issue was resolved efficiently, disruption was kept to a minimum, and communication throughout was clear and reassuring. Exactly what you want from a facilities partner when it counts.”

Kevin Turner, Senior Facilities Manager LSH

Your professionalism, attention to detail and dedication have been exemplary and don’t go unnoticed. Whenever we’ve called upon CMSL the service has been exceptional, with a real sense of care for the asset. It’s rare to see this level of service and commitment these days and we’re very grateful to be partnered with you and the company. Thank you for going above and beyond, it’s greatly appreciated.

Hylton Cresswell, Operations Manager, Grand Arcade (Cambridge)
It’s always a pleasure working with Carla and Maisie. Their response to a recent sprinkler issue was quick, practical, and professional. The CMSL engineer on site also offered to help without hesitation, which really reflects the team’s supportive and proactive approach. 
Richard Ryan, Centre Manager, Clifton Down Shopping Centre
“CMSL acted quickly and took full ownership of the issue from the outset. The team coordinated the right support, kept everything moving, and ensured the works were delivered smoothly with minimal disruption. A job well done, and I appreciate the professionalism throughout.”
Kevin Turner, Senior Facilities Manager LSH

“CMSL couldn’t have handled it better. The Helpdesk and Out of Hours Helpdesk were quick to respond during a recent out of hours callout, and the reactive communication since has been clear, professional, and consistent.”

Adam Mayes, Facilities Manager Cambridge Central Mosque

CMSL have been an outstanding partner to work with. The team are consistently professional, friendly, and highly skilled, which makes every project smooth and efficient. What stands out is the proactive approach. CMSL regularly bring forward practical suggestions around sustainability and cost savings, helping us future proof operations while staying budget conscious. Integrity, clear communication, and reliable delivery throughout.

Daryl Cowley, Facilities Manager, IRIS

“CMSL have been an outstanding partner to work with. The team are consistently professional, friendly, and highly skilled, which makes every project smooth and efficient. What stands out is the proactive approach. CMSL regularly bring forward practical suggestions around sustainability and cost savings, helping us future proof operations while staying budget conscious. Integrity, clear communication, and reliable delivery throughout.”

Daryl Cowley, Facilities Manager IRIS

“CMSL are always professional, responsive, and particularly helpful. The helpdesk support is brilliant.”

Jack McNally, MAPP

CMSL went above and beyond to resolve an issue for us quickly. The engineer was patient, professional, and even sourced a replacement part on the spot rather than waiting for delivery, ensuring minimal disruption. We are very grateful for the effort and the outstanding service provided.

Lauren Dillon, Workspace Experience Manager, MAPP (London Head Office)
Cambridge Maintenance have been with us for some time now and I’m very impressed with how professional and helpful both their engineers and Helpdesk team are. Mark Woolhouse, our site engineer, is one of the most professional, helpful, and nicest people I have ever worked with. He always ensures everyone is happy and follows up thoroughly on any issues. Mark is a great asset to the company. The Helpdesk Advisors are equally outstanding—always available, professional, and willing to help explain things further when needed. Melissa, in particular, has been brilliant, always happy to help and quick to resolve any concerns. I cannot thank the CMSL team enough.
Joanna, Security, PORTICO

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