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Salary
$78k – $100k per year
Location
Hybrid (Chester, United Kingdom)
Seniority
Senior
Visa
Sponsors visas in United States, Netherlands; no register of this country names it
Employment
Full-Time

Confirmed on the employer's own hiring board on Nov 7, 2026. First seen by Alion on Nov 3, 2026. Leidos scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Leidos is an American technology and engineering services company created in 2013 when Science Applications International Corporation split in two, with Leidos taking the technical services and solutions business. It is one of the largest suppliers to the United States government, working across defence programmes, intelligence systems, civil agencies including the Federal Aviation Administration, and healthcare services for the Department of Veterans Affairs. Headquartered in Reston, Virginia, the company also builds security detection products for airports and borders, and has concentrated recent investment on trusted artificial intelligence and autonomy for mission environments.

Senior Network Engineer

Location: Farnborough, UK

Security Clearance Level: DV

Everything we do is built on a commitment to do the right thing for our customers, our people and our community. Our mission and our values guide the way we do business. The foundation of our Leidos culture is our Values, Beliefs and Expectations by which we select, recognise and reward employees. They create the environment that drives us toward our mission.

Inspired to make a difference, we are committed to solving the world’s toughest problems.

Passionate about customer success by being determined to understand and respond to our customers’ needs as if they were our own.

United as a team, we are bound together by our conviction that ethics and integrity is core to how we operate.

Because of a key strategic development and a new exciting business opportunity, we have a requirement for a security-cleared Senior Network Engineer based in the UK working at our Farnborough site and remotely.

Leidos has more than 30 years’ experience of developing and running some of the largest government systems in the world. We are currently hiring to expand our UK based technical team who support our delivery for the UK Govt.

Come join our team and further develop your skills as we deliver and support systems key to the defence of the UK and partner nations.

Being part of the Leidos team is a commitment to push yourself and those around you to do better, constantly adapt and learn new technologies. We’re a passionate team and are committed to developing and growing our staff.

Leidos is a global science and technology solutions leader working to solve the world's toughest challenges in the defence, intelligence, homeland security, civil, and health markets. The company's 33,000 employees support vital missions for government and commercial customers.

The Role

Leidos is seeking a Network Engineer to support the development, transition & in-service running (including capability upgrades) of data centre hosted IT application and infrastructure solution providing support to a critical operational end user. The preferred candidate will demonstrate effective application of Network Engineering expertise and extensive knowledge across a variety of data centre, wide area, storage area and campus networking technologies: routing (dynamic protocols), switching, load balancing and firewalls.

The role will provide technical exposure variance across both outcomes-based project activities and operational (Business as Usual) support activities.

Your passions and experience will help you become a technical specialist and process owner with our operations support services including service improvement and add further value to our service offerings. You will be expected to contribute towards the creation and ongoing maintenance of technical documentation (HLDs, LLDs, Work Instructions) and provide material to support the project work or the operational support service.

We are looking for someone with a passion for Network Engineering, ideally from an enterprise data centre background. You will be self-motivated and be able to work autonomously to achieve day to day objectives with significant results on project or operational deliverables. Whilst also owning a variety of activities ensuring compliance with project milestones and customer KPIs and SLAs. You must be an effective communicator, comfortable directly engaging with customers and colleagues. You must also demonstrate an analytical and systematic approach to technical challenges.

WHAT WILL YOU BE DOING?

Key Responsibilities

  • Providing network engineering skills and produce low level designs as part of the delivery team
  • Work with delivery teams to implement modern, highly available, scalable networks using a range of new and emerging technologies including automation
  • Input into network management and acceptance aspects including setting standards and providing your technical expertise to Leidos programme teams
  • Utilise the concepts and principles of verification and validation to deliver relevant network designs
  • Collaborate with customers on all aspects of network management including the assurance and integration of infrastructure services to meet the needs of multiple lines of business
  • Recognise and exploit business opportunities by leveraging architecture and design best practice
  • Communicate effectively across organisational, technical and political boundaries, understanding the context.

What We Are Looking For

  • Strong knowledge and demonstrable experience of data centre and campus networking technologies: Juniper (routing, switching, firewalls), Fortigate (Next Gen firewalls), F5 (global and local load balancing), encryption;
  • Strong understanding of routing protocols (static and dynamic) in data centre, campus and wide area networks; With a thorough understanding of BGP.
  • Strong experience of operating high availability data centre networks supporting critical workloads on Windows, Linux and SAN including technical refresh of large numbers of devices;
  • Strong experience of monitoring and management tooling including Solarwinds, FMC, Panorama;
  • Have good general knowledge of Windows Server Environments, (including OS build, AD, DNS, DHCP and GPO) and Linux (RHEL) data centre server infrastructures;
  • Have excellent analysis and problem-solving skills, taking ownership of complex incidents ensuring these are resolved to the satisfaction of the customer;
  • Possess excellent written and verbal communication skills;
  • Knowledge and experience of working in Agile and or Scaled Agile delivery teams where secure by design is the approach to delivery.

.

Clearance and Location

  • Employment type: Full time, permanent.
  • Location: Farnborough, United Kingdom.
  • Dynamic working: This is a hybrid role requiring onsite attendance in Farnborough for a minimum of four days per week. Additional onsite attendance may be required to meet customer, programme or security needs.
  • Clearance: This role requires UK Developed Vetting (DV). Applicants must hold, or be eligible and willing to obtain and maintain, DV clearance for the duration of the role. Appointment and continued employment are subject to satisfying the applicable vetting requirements.

At Leidos, everything we do is built on a commitment to do the right thing for our customers, employees and communities. This role offers the opportunity to apply modern testing practices to complex technical challenges and contribute to solutions that support a safer United Kingdom.

What we do for you

At Leidos we are PASSIONATE about customer success, UNITED as a team and INSPIRED to make a difference. We offer meaningful and engaging careers, a collaborative culture, and support for your career goals, all while nurturing a healthy work-life balance.

We provide an employment package that attracts, develops and retains only the best in talent. Our reward scheme includes:

· Contributory Pension Scheme

· Private Medical Insurance

· 33 days Annual Leave (including public and privilege holidays)

· Access to Flexible benefits (including life assurance, health schemes, gym memberships, annual buy and sell holidays and a cycle to work scheme)

· Access to Flexi-time benefits

Commitment to Diversity:

We welcome applications from every part of the community and are committed to a truly diverse and inclusive culture. We foster a sense of belonging, welcoming all perspectives and contributions, and providing equal access to opportunities and resources for everyone. If you have a disability or need any reasonable adjustments during the application and selection stages, please let us know, and we will respond in a way that best fits your needs.

Who We Are:

Leidos UK & EUROPE - we work to make the world safer, healthier, and more efficient through technology, engineering and science.

Leidos is a growing company delivering innovative technology and solutions focused on safeguarding critical capabilities and transformation in frontline services, our work in the United Kingdom includes addressing some of the most complex problems in defence, healthcare, government, safety and security, and transportation.

What Makes Us Different:

Purpose: you can use your passion and abilities at Leidos to keep the people you care about safe. We are at the forefront of machine learning, AI, cyber security and solutions. Using your skills in the technology frontline by helping to build a safer world. You can inspire change.

Collaboration: having flexibility to do your job is one of our core benefits, enabling you to become part of our extraordinary team. We have been empowering our people to work flexibly for years. Whether you work from home, the office or on customer sites, we will give you the digital tools and the flexibility to work smarter and align your needs and ours.

People: Leidos empowers people from every background to be themselves and gives you the tools to learn new skills by enabling growth whilst developing. We believe that extraordinary people need opportunities to grow, to be inspired and to inspire others. At Leidos, we invest in technical academies, career rotations and career development plans that enhance your future.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

£58,400.00-£74,900.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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