CSS Field Service Engineer

Roke; Romsey; On-site; GBP 42,000 - 64,000; Full time

Job summary

Roke is seeking a Field Service Engineer to deliver high-quality support to customers across the UK and internationally. You will communicate with internal teams, customers, and suppliers to ensure efficient service delivery and strong customer satisfaction.

The role requires understanding of Electromagnetic Warfare, solid IT infrastructure knowledge, and experience with MoD projects. You will typically be based in Romsey, with UK travel and occasional international assignments, and you will

Qualifications

• Degree in engineering or equivalent qualification.
• Experience with MoD environments and security classifications.
• Knowledge of LAN, WAN, VLAN architectures and virtualization.

Responsibilities

• Perform engineering visits to customer sites for preventive and corrective maintenance.
• Patch/update/audit customer systems and products; repair, diagnose and fix issues.
• Support military exercises, demonstrations and testing; assist acceptance testing of new deliveries.

Skills

Electronic Warfare

IT infrastructure

MoD experience

Security classifications

Networking (LAN/WAN/VLAN)

Education

Degree in engineering

Tools

Windows Server 2016/2019/2022

VMware ESXi / Hyper-V

Firewalls

Crypto devices

Job description

Roke, Roke Manor, Romsey, Hampshire, United Kingdom

Job Description

Posted Wednesday 24 June 2026 at 00:00

Great ideas come from different minds. That's why we bring together engineers, scientists, analysts, and creatives from every background - and give them the trust, tools, and freedom to make a difference. What connects us is the mission: solving meaningful problems and building capability that protects what matters most.

And as the challenges evolve, so do we - working on the technologies that will shape tomorrow, not just today.

About Roke

Roke is a world-class engineering and technology company, with a trusted and long-standing record of delivery spanning research & development, products, managed-services and consultancy, serving customers across the globe. The markets Roke operates in are broad, but they are frequently crosscutting at engineering and delivery levels; markets include defence, national security, intelligence sectors, with diversity being at the centre of Roke's strategy.

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.

As well as Electromagnetic Warfare, you'll need a solid understanding of IT infrastructure and experience of working with/for the MoD.

Key Responsibilities

• Engineering visits (preventive and corrective): Visit customer sites (sometimes at short notice) to
• maintain/patch/update/audit customer systems and products,
• perform corrective maintenance and repairs to resolve customer issues
• support military exercises, demonstrations, testing,
• supporting customer acceptance testing of new deliveries/products,
• deliver operator and maintainer training.
• Remote support: Provide 1 st /2 nd line support on behalf of the service desk when customers log issues about the operation/maintenance of products.
• Join an on-call 24/7 rota (1wk on 3wks off) where you may be contacted and required to attend customer site at short notice.
• Infrastructure and Network support: Install, configure, and maintain Windows Server environments (2016/2019/2022). Configure and manage firewall platforms (hardware and software-based). Maintain virtualized environments using platforms such as VMware ESXi, Microsoft Hyper-V.
• Customer Repairs (RMAs): Perform root cause analysis, investigating issues in a logical manner to determine root cause through various methods such as utilising test rigs, isolating faults down to specific boards/components by elimination, engaging with product owners and SMEs as required. Documenting corrective actions, summarising parts required and effort involved, creating fault report forms, RMA notifications, BER certificates, certificates of conformance etc.

Education and Qualifications

• Degree or HND/HNC qualified in an engineering discipline
• Served in the 14 Signal Regiment.
• Full driving license

Knowledge, Skills & Experience

• Electronic Warfare experience within the MoD (14 Signal Regiment)
• Previous demonstrable experience of delivering and supporting hardware and infrastructure in the military domain
• Experience working at differing levels of security classification.
• Knowledge of LAN, WAN, and VLAN architectures and networks, hardware, firewalls, hypervisor and windows /linux configuration and management.
• Knowledge of Crypto devices
• Knowledge and understanding of supporting and maintaining equipment in the live environment whether on military exercise or technical demonstrations / installation.
• Understanding of planning and executing hardware lifecycle management, upgrades and capacity expansion.
• Experience in the service support of low volume, high value, products and systems in a highly regulated environment.
• Awareness of ITIL (v3 or v4).

Where will you be based?

• You will typically be working from Romsey, but may be required to work from Romsey or customer site as needed.

Why You Should Join Us

We have a competitive salary and access to a number of additional flexible benefits, which will cover Health and Wellbeing, Savings and Protection and Life, Leisure and Entertainment.

Roke has a great community of groups with shared interests. These enable people to share ideas and be passionate about tools, technologies and techniques, which interest them.

We are committed to a policy of Equal Opportunity, Diversity and Inclusion. Our working environment is friendly, creative and inclusive and support a diverse work‑force and those with additional needs.

Security Information

Due to the nature of this position, we require you to be eligible to achieve DV clearance. As a result, you should have resided in the UK for the last 10 years.

Roke, Roke Manor, Romsey, Hampshire, United Kingdom