Senior Systems Integration Architect

Systems Integration Architect

Location: Hybrid, Whiteley, Hampshire
Security Clearance: This role requires the ability to obtain and maintain UK Security Clearance (SC). Eligibility will be discussed during the recruitment process.

The Opportunity

We are looking for a Systems Integration Architect to join our Air Traffic Management engineering team and help shape the future of critical national infrastructure.

In this role, you’ll lead the design, integration, and modernisation of network solutions that support highly available, safety-critical systems. Working alongside multi-disciplinary engineering teams, you'll help translate operational and technical requirements into resilient, secure, and scalable network architectures.

This position offers the opportunity to influence technical strategy, guide key architectural decisions, and play a significant role in delivering solutions that support complex operational environments. You'll be involved throughout the engineering lifecycle, from early concepts and requirements through design, integration, testing, deployment, and ongoing improvement.

What You'll Be Doing

• Lead the design and integration of network solutions within complex engineering programmes.
• Develop network architectures and detailed designs that meet performance, resilience, security, and operational needs.
• Translate business, operational, and technical requirements into practical engineering solutions.
• Collaborate with systems, software, infrastructure, and test teams to ensure successful integration and deployment.
• Provide technical leadership and guidance across the engineering lifecycle.
• Evaluate technologies and recommend solutions that support programme objectives.
• Support integration, verification, validation, and acceptance activities.
• Help identify and manage technical risks, dependencies, and design trade-offs.
• Produce and review technical documentation, ensuring solutions are maintainable and supportable.
• Engage with customers, suppliers, and stakeholders to support successful delivery.

What We're Looking For

We're interested in hearing from people who can demonstrate experience in some or all of the following areas:

• Network architecture and solution design within complex environments.
• Enterprise, operational, or mission-critical network infrastructure.
• Ethernet, TCP/IP, LAN, and WAN technologies.
• Routing, switching, segmentation, and network security.
• High-availability and resilient network architectures.
• Network performance analysis, monitoring, and troubleshooting.
• Systems integration across multiple platforms, environments, and security domains.
• Requirements analysis, network design, and technical assurance.
• Integration, verification, and validation activities.
• Working within structured engineering, delivery, or change-controlled environments.

It Would Be Great If You Also Have Experience In

• Safety-critical or mission-critical systems.
• Air Traffic Management, aviation, transport, defence, or other highly regulated environments.
• Network modernisation, migration, and transition programmes.
• Linux or Unix-based environments.
• Cyber Security principles and secure-by-design approaches.
• Systems Engineering and requirements-led development.
• Formal testing, acceptance, and assurance processes.
• Working directly with customers, suppliers, and technical authorities.

What You'll Bring

• Strong technical leadership and sound engineering judgement.
• A collaborative approach and the ability to work effectively across diverse teams.
• Confidence in analysing complex problems and developing practical solutions.
• Excellent communication skills, with the ability to explain technical concepts to both technical and non-technical audiences.
• Strong stakeholder engagement and influencing skills.
• The ability to make informed technical decisions and clearly communicate the rationale behind them.
• A commitment to quality, continuous improvement, and knowledge sharing.

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 and much more!)
• Flexi-Time Working

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 a 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:

Pay Range:

£61,500.00-£78,800.00

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.