IT Infrastructure Team Lead

Mass Limited; St. Neots; On-site; GBP 55,000 - 75,000; Full time

Job summary

MASS is an independent, global technology company, trusted by highly‑secure organisations to provide advanced, digital services that manage data and keep information safe. Based from our St Neots office, this IT Infrastructure Team Lead role combines hands‑on engineering with people leadership to deliver and support secure systems across customer contracts.

You’ll line‑manage a small team of IT Infrastructure Engineers, prioritise work against customer requirements, risks and security

Qualifications

• Current UK Security Check (SC) clearance.
• Experience delivering IT infrastructure within defence or secure environments.
• Strong Windows Server, Active Directory and core domain services knowledge.
• Good networking knowledge (firewalls, routers, switches).
• Experience with virtualization technologies (VMware/Hyper-V).
• Strong incident troubleshooting and 3rd line support capability.

Responsibilities

• Lead a small team of IT Infrastructure Engineers and provide technical direction.
• Own technical delivery across customer projects and services.
• Prioritise activity against risk, resource and customer requirements.
• Lead resolution of complex infrastructure, hardware, software and networking issues.
• Provide technical escalation and 3rd line support.
• Contribute to design, integration, implementation and maintenance of secure IT systems.
• Monitor and maintain critical systems and networks.
• Mentor engineers and promote best engineering practices.

Skills

SC clearance

Windows Server

Active Directory

Networking

Virtualisation (VMware/Hyper-V)

3rd line support

Stakeholder management

DV clearance

Tools

VMware

Hyper-V

Job description

We're looking for an IT Infrastructure Team Lead to lead a small team of engineers delivering and supporting secure IT systems for one of our key customer contracts. This isn't a traditional service-management role. You'll combine technical leadership, people management and hands‑on engineering, taking ownership of delivery while remaining close enough to the technology to troubleshoot complex problems, guide technical decisions and support the introduction of new capability. Working across Windows infrastructure, networking, virtualised environments and secure systems, you'll help ensure critical customer environments remain resilient, effective and well supported. The role is based from our St Neots office and includes regular travel to UK customer sites, with occasional overseas travel and periods away from home depending on project requirements.

How you'll support us

You'll lead the day‑to‑day activity and development of a team of IT Infrastructure Engineers, providing the technical direction they need to deliver effectively. You'll prioritise work against customer requirements, timescales, resources and security considerations, while acting as a senior technical point of contact for key stakeholders. You'll also remain directly involved in delivery, whether troubleshooting a difficult infrastructure issue, supporting a system deployment, reviewing a technical approach or working with customers to understand their next challenge.

• Lead, line manage and develop a small team of IT Infrastructure Engineers
• Take ownership of technical delivery across customer projects and services
• Plan and prioritise activity against risk, resource and customer requirements
• Lead the resolution of complex infrastructure, hardware, software and networking issues
• Provide technical escalation and 3rd line support
• Support the design, integration, implementation and maintenance of secure IT systems
• Monitor and maintain critical systems and networks
• Contribute to system design and solution architecture
• Maintain clear technical, support and procedural documentation
• Coach and mentor engineers, sharing good engineering practice across the team

Are you an experienced Infrastructure or Systems Engineer with a background in UK defence and MoD environments, ready to lead a technical team while remaining hands‑on? You'll already be an experienced, hands‑on Infrastructure, Systems or IT Engineer with the technical breadth to guide others when problems become complex.

You’ll also have experience operating within the UK defence sector and MoD environment, giving you an understanding of the security, assurance and operational constraints that come with delivering technology in this setting. You may already formally lead a team, or you might be a senior engineer who has naturally become the person others turn to for technical direction, mentoring and difficult decisions.

Essential experience

• Current UK Security Check (SC) clearance
• Experience delivering IT infrastructure within the UK defence sector, including supporting or working within MoD environments
• Strong experience with Windows Server, Windows Client, Active Directory and core domain services
• Good knowledge of networking, including firewalls, routers and switches
• Experience with virtualisation technologies such as VMware and/or Hyper-V
• Strong infrastructure troubleshooting and 3rd line support capability
• Experience with system design, integration and implementation
• Experience leading, mentoring or providing technical direction to other engineers
• Strong customer and stakeholder management skills
• Ability to prioritise technical work and make sound decisions around risk, security and delivery
• Willingness and eligibility to undertake Developed Vetting (DV) longer-term

Desirable experience

• Formal line management experience
• Direct experience working with MoD customers and stakeholders
• Experience supporting air-gapped, restricted or highly secure networks
• Current or previous DV clearance
• Knowledge of Secure by Design principles
• Project or technical delivery management experience

We're particularly interested in experienced Senior Infrastructure Engineers, Senior Systems Engineers and Technical Leads looking to combine their engineering background with greater responsibility for people, delivery and customer outcomes.

MASS is an independent, global technology company, trusted by highly‑secure organisations to provide advanced, digital services that manage data and keep information safe. With our heritage in defence, we offer robust solutions to sectors where security expertise is essential. We work in partnership with customers, using skilled, technical experts. We think innovatively to provide tailored, agile and resilient solutions that secure advantage, so you're ready for digital transformation. Wellbeing is at the core to our culture, allowing employees to flourish and to achieve their full potential. Our people are important to us, and we take pride in our wellbeing programmes and policies that support individuals including, mental health first aiders and readily available support through our extensive employee assistance programme. MASS is an equal opportunities employer; we know that our people are smart, skilled and motivated and in return we provide a friendly workplace where everyone is valued and has the chance to make an impact.

We're MASS, an independent, global technology company, trusted by highly‑secure organisations to provide advanced, digital services that manage data and keep information safe. We're experts in defence and other sectors that need our experience and knowledge to protect confidential data. At MASS, we work together to put customer needs first, in small teams where we give you the freedom to take ownership. It means you make an impact from the start, with our management always available to offer support. We want people to fulfil their ambitions, whether that's through further study, technical training or exploring other business areas. Our benefits are competitive, but it's the family atmosphere that makes us a great place to be, celebrating successes together and getting to know each other through socials and events. We promote wellbeing and balance, with flexibility where possible and we work hard to widen access to STEM careers through our apprenticeships and initiatives, always encouraging diverse perspectives across the company. Life at MASS is challenging, exciting, inspiring and rewarding. Our people are curious, problem‑solvers, great at what they do, and love their work. If that's you, come and join us.