Senior Platform Engineer (Permanent) in Somerset, Yeovil

Are you ready to take on complex technical challenges supporting secure cross-domain services that protect national security? At Leonardo, our Senior Platform Engineers operate, maintain and improve secure gateway platforms that enable controlled information flow between security domains and keep our customers' missions running.

Your work at Leonardo UK will see you take the lead in solving customer problems in an agile, innovative and team-centric manner. The role may involve a blended hybrid working model, with a mixture of working from home and working on site at one of our Leonardo offices to ensure close collaboration with the wider team and with our customers.

Leonardo UK is seeking a Senior Platform Engineer to join the Cyber & Security Solutions Division team. What you will do as a Senior Platform Engineer:

• Maintain secure configurations, transfer policies, rule sets and supporting documentation.
• Troubleshoot gateway, platform, network and data transfer issues across security boundaries.
• Produce and maintain operational documentation, including build records, support guides, runbooks and configuration baselines.
• A disciplined service mindset, with the ability to balance hands-on technical support, assurance, documentation and continuous improvement.
• Confidence working across technical, security, service management and customer stakeholders to resolve issues and maintain service integrity.
• Cross-domain solutions: operation, support and controlled configuration of data transfer between security domains (e.g. high-to-low, restricted-to-enterprise).
• Windows and Linux operating systems.
• Secure data handling and policy enforcement (sanitisation, validation, filtering).
• Implementation of controlled and auditable data transfer mechanisms.
• Networking concepts (TCP/IP, DNS, DHCP, firewalls).
• Automation and scripting (PowerShell, Bash, Python, Ansible, Terraform).
• Knowledge of cyber security controls and accreditation requirements.
• Design and assurance of secure data flows across trust boundaries.
• Monitoring, patching, vulnerability remediation and service continuity.
• Data diode or one-way transfer architectures.
• Integration with security tooling, such as SOC, SIEM or monitoring platforms.
• Performance and throughput optimisation for secure data transfer systems.
• Experience supporting service management processes, including incident, problem, change and configuration management.
• Experience with cloud platforms, such as AWS or Azure, and Infrastructure as Code.

We offer a comprehensive, company-funded benefits package that supports your wellbeing, career development, and work-life balance:

• Award-winning pension scheme with up to 15% employer contribution.
• Free access to mental health support, financial advice, and employee-led networks.
• Never Stop Learning: Free access to 4,000+ online courses via Coursera and LinkedIn Learning.
• Spend up to £500 annually on flexible benefits such as private healthcare, lifestyle discounts, and gym memberships.
• Flexible Working: Flexible hours with hybrid working options.

For a full list of our company benefits please visit our website. Headquartered in Italy, we employ over 53,000 people worldwide including 8,500 across 9 sites in the UK. At Leonardo we are committed to building an inclusive, accessible, and welcoming workplace.