Senior Network Engineer
Do you want to grow your career in networking, take on complex technical challenges, and help shape secure networks that underpin the UK’s most critical missions? At Leonardo, our Senior Network Engineers are at the heart of designing, configuring, and supporting secure networks that keep our customers connected and protected.
Working fully onsite at a customer location, you will tackle customer problems in an agile, innovative, and team‑centric manner, collaborating closely with the wider team and our customers.
What You Will Do
- Lead the design, configuration, implementation, and support of secure networks within a secure, on‑premise environment.
- Provide 1st, 2nd, and 3rd line support on premise and at deployed sites as part of a small team supporting a limited number of high‑value users.
- Be willing to flex across roles where needed, supporting colleagues and contributing to the wider team’s objectives.
- Take ownership of engineering delivery for one or more work packages, including planning, estimation, execution, and reporting.
- Develop and review high‑ and low‑level network designs, implementation plans, and technical documentation.
- Integrate, test, and support network components, ensuring compliance with performance and security requirements.
- Provide guidance and technical support to other engineers and technicians within the team.
- Collaborate with stakeholders, project teams, and customers to ensure solutions meet operational and technical requirements.
- Contribute to continuous improvement, engineering standards, and governance activities.
What You’ll Bring
- Strong technical ability with demonstrable experience of delivering and supporting secure network solutions.
- Strong technical ability with demonstrable experience of delivering and supporting secure network solutions.
- Strong technical ability with demonstrable experience of delivering and supporting secure network solutions.
- Experience working onsite in secure environments.
- Adaptability and willingness to support a range of operational tasks, not solely project‑based engineering activity.
Core Areas (must Have)
- Strong understanding of TCP/IP, OSI model, and routing/switching protocols (BGP, OSPF, HSRP, QoS, VPNs, VLANs).
- Hands‑on experience with Cisco (CCNA/ CCNP level) or equivalent multi‑vendor equipment (Dell, Palo Alto, Fortinet).
- Ability to provide 1st, 2nd, and 3rd line support in a secure operational environment.
- Experience with network security technologies (firewalls, IDS/IPS, VPN, NAC).
- Experience designing, configuring, and supporting networks within secure on‑premise environments.
- Experience with network monitoring, diagnostic, and support tools.
- Understanding of ITIL and service management frameworks.
Desirable
- CCNA/At least one Cisco CCNP module or equivalent certification/experience (2-4 years).
- Knowledge of software‑defined networking (SDN, SD‑WAN).
- Familiarity with scripting and automation (Python, Ansible, Terraform).
- Exposure to SIEMs and wider cyber security toolsets.
- Familiarity with MODCert and associated compliance processes.
- Experience with SolarWinds for monitoring and infrastructure visibility.
- Experience with enterprise IT services (Active Directory, DNS, PKI, monitoring).
- Experience mentoring engineers and contributing to technical governance.
Security Clearance
This role is subject to pre‑employment screening in line with the UK Government’s Baseline Personnel Security Standard (BPSS). An additional range of Personnel Security Controls referred to as National Security Vetting (NSV) will apply. This role requires Developed Vetting (DV) clearance prior to starting. For more information and guidance please visit: https://careers.uk.leonardo.com/gb/en/security‑and‑vetting
Location
This role is fully site‑based, 5 days per week, at a secure customer site in London. No hybrid or remote working.
Why Join Us
- Enjoy generous leave with the opportunity to accrue up to 12 additional flexi‑days each year.
- Benefit from our award‑winning pension scheme with up to 15% employer contribution.
- Free access to mental health support, financial advice, and employee‑led networks championing inclusion and diversity (Enable, Pride, Equalise, Armed Forces, Carers, Wellbeing and Ethnicity).
- All employees at management level and below are eligible for our bonus scheme.
- Free access to 4,000+ online courses via Coursera and LinkedIn Learning.
- Receive a financial reward through our referral programme.
- Spend up to £500 annually on flexible benefits including private healthcare, dental, family cover, tech & lifestyle discounts, gym memberships and more.
- Flexible hours with hybrid working options. For part time opportunities, please talk to us about what might be possible for this role.
Primary Location: GB – London
Contract Type: Employee-Permanent
Hybrid Working: Onsite
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