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# Principal Platform Engineer (Cross Domain)

- **Company:** Leonardo UK
- **Location:** Yeovil, UK (Remote available)
- **Salary:** £53,269.0 - £71,400.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Amazon Web Services, Systems Engineering, Microsoft Azure, Bash Shell, Computer Networks, Data Transmissions, Data Security, Dynamic Host Configuration Protocol, Linux, Domain Name System (DNS), Hyper-V, Python (Programming Language), Windows PowerShell, Ansible, Security Information and Event Management, TCP/IP, Virtualization Technology, DevOps Tools - Open-source, Firewalls (Computer Science), Containerization, Kubernetes, Terraform, Docker, Vmware
- **Published:** July 3, 2026
- **Apply:** https://uk.indeed.com/viewjob?jk=9e634f45923cdd23

## About the Role

* 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.

Core areas (must have):

 * Windows and Linux operating systems
 * Virtualisation platforms (VMware, Hyper-V)
 * Cross-domain solutions: design and implementation of data transfer between security domains (e.g. high-to-low, restricted-to-enterprise)
 * 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)

Desirable:

 * Experience with cross-domain / secure transfer solutions (e.g. Opswat or similar)
 * Data diode / one-way transfer architectures
 * Integration with security tooling (SOC, SIEM, monitoring platforms)
 * Performance and throughput optimisation for secure data transfer systems
 * Expertise with cloud platforms (AWS, Azure) and Infrastructure as Code
 * Hands-on use of DevSecOps tools and CI/CD pipelines
 * Containerisation platforms (Kubernetes, Docker)

## Description

* Act as the technical authority on one or more platform engineering domains (e.g. cloud, virtualisation, automation, networking, or cyber tooling) 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.


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