Principal Platform Engineer (Cross Domain)

Salary: £61,000 - 101,000 per year

Requirements:

• Extensive technical expertise across multiple platform domains, with a track record of delivering secure solutions.
• The ability to balance hands-on engineering with technical leadership and mentorship.
• A problem-solving mindset, able to innovate and recommend the best approach for complex challenges.
• Windows and Linux operating systems.
• Virtualisation platforms, including VMware and Hyper-V.
• Cross-domain solutions: design and implementation of data transfer between security domains.
• Secure data handling and policy enforcement, including sanitisation, validation, and filtering.
• Implementation of controlled and auditable data transfer mechanisms.
• Networking concepts, including TCP/IP, DNS, DHCP, and firewalls.
• Automation and scripting, including PowerShell, Bash, Python, Ansible, and 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 or secure environments, including cross-domain, air-gapped, and defence environments.
• This role is subject to pre-employment screening in line with the UK Governments Baseline Personnel Security Standard (BPSS).
• Additional Personnel Security Controls referred to as National Security Vetting (NSV) will apply.
• This role requires Developed Vetting (DV) clearance prior to starting.

Responsibilities:

• Act as the technical authority on one or more platform engineering domains, providing specialist domain expertise to projects and programmes.
• Lead the design and implementation of secure platforms across on-premise, hybrid, and cloud environments.
• Capture, analyse, and interpret complex customer requirements to drive system design and architecture.
• Develop high- and low-level designs, ensuring alignment with secure-by-design principles.
• Take ownership of technical delivery within work packages, including planning, estimation, and progress reporting.
• Mentor, coach, and develop junior and senior engineers, raising technical capability across the community.
• Provide input to technology strategies, feasibility studies, and innovation projects.
• Engage with internal and external stakeholders, presenting technical solutions and justifying design decisions.

Technologies:

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

More:

hackajob is partnering directly with Leonardo to hire for this role. We offer a salary range of £53,269 - £71,400 under our grade-based salary framework, benchmarked against the external market. The role may involve a blended hybrid working model, with a mixture of working from home and working on site at one of our UK offices, including Yeovil, 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 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, free access to 4,000 online courses via Coursera and LinkedIn Learning, and flexible benefits worth up to £500 annually for private healthcare, lifestyle discounts, and gym memberships. We are Leonardo, a global leader in Aerospace, Defence, and Security, headquartered in Italy, with over 53,000 people worldwide and 8,500 across 9 sites in the UK. We are committed to building an inclusive, accessible, and welcoming workplace where diversity drives innovation and better outcomes.

last updated 37 week of 2026