Field Service Engineer

CBSbutler Holdings Limited trading as CBSbutler; Woking; Hybrid; GBP 60,000 - 70,000; Full time

Job summary

CBSbutler Holdings Limited trading as CBSbutler is recruiting a Field Service Engineer to support advanced defence technology across secure customer sites throughout the UK. This role involves out‑with‑customers, maintaining critical systems, and supporting military exercises, with a 24/7 on‑call rota (1 week in 4).

You will work on secure networking, firmware updates and system audits, with responsibilities spanning installation, configuration, and customer training across Windows Server, RF

Qualifications

• HNC/HND or Degree in Engineering (or equivalent military experience).
• Full UK Driving Licence.
• Willingness and eligibility to obtain SC and DV Security Clearance.
• Flexibility to travel to customer sites, with occasional overseas travel.
• Availability to participate in a 24/7 on‑call rota (1 week in 4).

Responsibilities

• Commission, configure and support secure networking and encryption equipment.
• Carry out planned maintenance, patching, firmware updates and system audits across customer sites.
• Diagnose and repair complex hardware faults through structured root cause analysis.
• Install, configure and maintain Windows Server, virtualised environments and secure network infrastructure.
• Support military exercises, demonstrations, customer trials and acceptance testing.
• Deliver operator and maintainer training to end users.
• Provide 1st and 2nd line remote technical support for customers.
• Act as the technical interface between customers, engineering, logistics and project teams.
• Produce detailed service reports, technical documentation and knowledge base articles.
• Support software releases, deployments, configuration management and hardware lifecycle activities.
• Analyse field performance data to drive continuous improvements across products and support services.
• Participate in a 24/7 on‑call rota (1 week in 4).

Skills

MoD experience

RF systems

Cisco networking

Windows Server

VMware ESXi / Hyper‑V

LAN/WAN

Security clearance readiness

Field engineering

Customer liaison

Education

Engineering degree or military equivalent

Tools

Cisco networking equipment

VMware ESXi / Hyper‑V

Windows Server

Job description

Field Service Engineer

Woking/Hybrid (2 - 3 days wfh)

Join a 24/7 on‑call rota (1 week in 4).

£60,000 – £70,000 (depending on experience).

Candidates must be willing and eligible to obtain SC and DV security clearance.

We are recruiting a Field Service Engineer to support advanced defence technology across secure customer sites throughout the UK for a client who is a leading tech and engineering firm operating within defence.

This role is not desk‑based. You will be out with customers maintaining critical systems, supporting military exercises, carrying out technology upgrades, diagnosing complex faults and ensuring operational capability is always maintained. Whether your experience comes from deployed operations, secure headquarters, NATO exercises or supporting classified infrastructure, your background is highly relevant.

The Opportunity

The Field Service Engineer plays a key role in delivering high‑quality support to customers across the UK and international locations. The role involves regular communication with internal teams, customers and suppliers to ensure efficient service delivery and consistently high levels of customer satisfaction to drive sustainable and profitable business growth.

You’ll need a solid understanding of IT infrastructure, networks & networking, Radio Frequency and experience of working with/for the MoD.

Key Responsibilities

• Commission, configure and support secure networking and encryption equipment.
• Carry out planned maintenance, patching, firmware updates and system audits across customer sites.
• Diagnose and repair complex hardware faults through structured root cause analysis.
• Install, configure and maintain Windows Server, virtualised environments and secure network infrastructure.
• Support military exercises, demonstrations, customer trials and acceptance testing.
• Deliver operator and maintainer training to end users.
• Provide 1st and 2nd line remote technical support for customers.
• Act as the technical interface between customers, engineering, logistics and project teams.
• Produce detailed service reports, technical documentation and knowledge base articles.
• Support software releases, deployments, configuration management and hardware lifecycle activities.
• Analyse field performance data to drive continuous improvements across products and support services.
• Participate in a 24/7 on‑call rota (1 week in 4).

We're looking for engineers with experience in:

• Royal Air Force, Royal Signals, 14 Signal Regiment, REME or Defence Communications.
• MoD engineering or secure defence environments.
• Radio Frequency (RF) systems and secure communications.
• Cisco networking, routers, switches and firewalls.
• Windows Server 2016/2019/2022.
• VMware ESXi and/or Microsoft Hyper‑V.
• LAN, WAN and VLAN networking.
• Encryption and cryptographic devices.
• Hardware installation, fault finding, preventative maintenance and lifecycle management.
• Customer‑facing engineering and stakeholder communication.
• Producing technical documentation, service reports and maintenance records.
• Working within controlled change, release and configuration management processes.
• Supporting operational or deployed defence infrastructure.

You'll need

• HNC/HND or Degree in Engineering (or equivalent military experience).
• Full UK Driving Licence.
• Willingness and eligibility to obtain SC and DV Security Clearance.
• Flexibility to travel to customer sites, with occasional overseas travel.
• Availability to participate in a 24/7 on‑call rota (1 week in 4).

Why Join?

You’ll continue supporting technology that genuinely matters while working with some of the UK’s most advanced defence systems.

The role offers a great balance of field engineering and hybrid working, exposure to cutting‑edge secure technology, direct engagement with defence customers and the opportunity to influence future product improvements through your technical expertise.

If you are interested in this role, please submit your CV.