Senior Platform Engineer

Salary: £76,000 - 94,000 per year

Requirements:

• Strong technical ability with experience operating and supporting secure platforms or gateway services in controlled environments.
• 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.
• Virtualisation platforms (VMware, Hyper-V).
• 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.
• Experience across the systems engineering lifecycle.
• Design and assurance of secure data flows across trust boundaries.
• Delivery within highly controlled / secure environments (e.g. cross-domain, air-gapped, defence).
• Incident, problem and change management.
• Monitoring, patching, vulnerability remediation and service continuity.
• Experience with specific cross-domain or secure transfer products, such as Opswat or similar.
• 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.
• Hands-on use of DevSecOps tools, CI/CD pipelines or automation tooling.
• Containerisation platforms, such as Kubernetes or Docker.
• This role is subject to pre-employment screening in line with the UK Governments 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.

Responsibilities:

• Operate, maintain and support secure cross-domain gateway services across highly controlled environments.
• Monitor service health, investigate issues and support incident, problem and change activity in line with agreed service processes.
• Maintain secure configurations, transfer policies, rule sets and supporting documentation.
• Support patching, upgrades, vulnerability remediation and service continuity activities.
• 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.
• Work with security, service management, engineering and customer stakeholders to ensure cross-domain services remain compliant, available and fit for purpose.
• Identify and deliver continuous service improvements to improve reliability, security and operational efficiency.

Technologies:

• AWS
• Ansible
• Azure
• Bash
• CI/CD
• Cloud
• DevSecOps
• Docker
• Hyper-V
• Support
• Kubernetes
• Linux
• Network
• PowerShell
• Python
• Security
• TCP/IP
• Terraform
• VMware
• Windows
• DevOps
• Flow

More:

We are Leonardo UK, operating a grade-based salary framework with a salary range of 44,171 to 61,950 for this role. This Senior Platform Engineer position sits within our Cyber & Security Solutions Division and focuses on operating, maintaining, assuring and improving secure cross-domain gateway services that support critical defence, government and public sector operations. The role is based at our Yeovil site and may involve a blended hybrid working model with both home and on-site working to support collaboration with our team and customers. We offer a comprehensive, company-funded benefits package that supports wellbeing, career development and work-life balance, including generous leave with the opportunity to accrue up to 12 additional flexi-days each year, an award-winning pension scheme with up to 15% employer contribution, free access to mental health support and financial advice, learning through Coursera and LinkedIn Learning, flexible benefits worth up to 500 annually, and flexible hours with hybrid working options. We are a global leader in Aerospace, Defence and Security, headquartered in Italy, with over 53,000 employees worldwide and 8,500 across 9 UK sites. We are committed to building an inclusive, accessible and welcoming workplace.

last updated 36 week of 2026