Principal Systems Engineer

Prattwhitney; Warminster; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid work arrangement

Career growth & benefits

Equal opportunity employer

Job summary

OMNIA Training in the United Kingdom is seeking a Principal Systems Engineer to lead complex training system developments for the Army Collective Training Service. You will work in a hybrid setup across multi-disciplinary teams, shaping requirements, architecture, and integration.

The role requires security clearance readiness and a track record in systems engineering within defence environments. The successful candidate will translate operational needs into practical designs, oversee

Qualifications

• Experience in system requirements writing and design documentation.
• Knowledge of System Engineering V-model lifecycles and processes.
• Ability to translate operational and technical requirements into practical system architectures.

Responsibilities

• Define work packages and technical requirements across complex services.
• Lead definition of requirements and producing designs.
• Maintain records, log activities, and quality assurance.
• Act as technical liaison between engineering teams and supply chain.
• Lead and deliver key work packages and system engineering activities.
• Review, analyze, and deliver advanced training environments and concepts.
• Support deployment, testing, validation, and troubleshooting.

Skills

Multidisciplinary teams

Systems Engineering Process

Write system requirements

V-model lifecycles

ICDs

Engineering standards

Jira & Confluence

Engineering degree

Lead a team

Translate requirements to architecture

Cloud (AWS/Azure)

Education

Engineering degree or equivalent

Tools

Jira

Confluence

Job description

Date Posted: 2026-09-22 Country: United Kingdom Location: Warminster, Wiltshire Position Role Type: Hybrid Principal Systems Engineer

Be at the forefront of transforming British Army training.

About us

At OMNIA® Training, we’ve brought together some of the UK’s most innovative defence training organisations under one powerful mission: to transform the British Army’s training system and create the best-trained Army in the world. OMNIA are redefining the British Army’s collective training. To do that, we are looking for the best and brightest minds from across the UK. We are backed by British innovation and powered by world-class experts, like you. OMNIA is at the heart of the UK’s bold Land Industrial Strategy.

The role

This is more than a job — it’s a mission. You will be part of a high-impact, collaborative environment, where we expect everyone to live the values and standards of the British Army. Every person in our team plays a critical role in delivering OMNIA’s vision; designing, delivering, and transforming collective training so the British Army is ready to fight and win. You’ll work in a matrix organisation and report operationally through OMNIA Training and functionally through the Systems Solutions Lead. Ultimately, you’ll work for the British Army, championing innovation, and helping shape the future of military collective training.

Key Responsibilities

• Working with a multidisciplined team to define work packages and technical requirements across multiple complex services and capabilities to meet required technical and operational specifications
• Lead definition of requirements and producing designs
• Carries out agreed operational procedures of a routine nature, logging, delegating and quality assuring
• Act as the technical liaison between engineering teams and supply chain partners, ensuring technical specifications, standards, and integration requirements are clearly communicated and understood
• Maintains relevant records and documentation, leads audits
• Individually contribute to the execution and delivery of key work packages
• Lead and undertaking activities associated with Systems Engineering, including product development and qualification
• Work with the OMNIA Training team to assist in the review, analysis, implementation and delivery of advanced training environments and concepts
• Contributes to maintenance, installation and problem resolution
• Contributes to and helps improve system operation
• Deputise for the Systems Solutions Lead
• Provide guidance and mentoring to more junior engineers
• Be ‘Responsible for championing and fostering a culture of Environmental, Health, and Safety (EHS) compliance and continuous improvement’
• Any other duties required to meet the needs of the programme

Who we are looking for

We’re after individuals who want to serve. You’ll have a mission focus, and the enthusiasm and drive to ‘get things done’. You’ll want to work in collaboration with other defence training organisations, and the British Army. You won’t let bureaucracy get in the way of what needs to be done, you’ll learn lessons and share these lessons across the team. You won’t necessarily have a military background, but you’ll understand what it means to serve and to put the mission first. The OMNIA Principal Systems Engineer will be part of the team responsible for the delivery of complex bespoke training systems capabilities, technology and solutions for the Army Collective Training Service (ACTS). Responsible to the Systems Solutions Lead, this position will be critical to the successful technology and interoperability of the entire solution. The position is suited to a Training Technologist or Systems Engineer who has the appetite to develop further into Systems Engineering or Training Solution Systems and thrives on the challenge of tackling requirements definition, design, integration and delivery of a wide range of solutions across a broad spectrum of technologies, including simulation systems and synthetic environments. This will be done following the System Engineering process through the lifecycles through waterfall and agile methodologies. A key part of the role will be liaising across third parties and subcontractors to ensure their technical deliveries are aligned through the supply chain. This position requires a customer first mindset, strong stakeholder engagement skills, and the ability work in a multidisciplinary engineering team in a complex and evolving environment.

Essential Skills and Experience

• Working in multi-disciplinary teams within a system engineering environment
• Knowledge of Systems Engineering Process (ISO 15288)
• Experience of writing system requirements and producing design documentation
• Knowledge in the System Engineering V-model lifecycles and processes
• Writing technical specifications and Interface Control Documents (ICDs)
• Systems Engineering technical standards, principles, theories, concepts and techniques
• Experience with the Atlassian Suite, working with Jira, Confluence
• Engineering background with a degree in a relevant discipline or equivalent professional experience
• Experience leading a team within a complex environment
• Ability to translate operational and technical requirements into practical system architectures, designs and implementation plans
• Experience supporting technical deployments within structured delivery environments (e.g. Agile or SAFe)
• Experience supporting system testing, validation, and troubleshooting during deployment and operational phases
• Experience of Cloud Service and hosting with AWS or Azure
• Holds, or is eligible to obtain, UK Security Clearance (SC)

Desirable Skills and Experience

• Experience of writing training system requirements and designs across the Live Virtual and Constructive environments
• Engineering, (mechanical, electrical, software, systems)
• Awareness of TOGAF and/or NAFv4
• Experience delivering multi-system integration projects within defence, government, or highly regulated environments
• Working knowledge of Training Systems standards and frameworks (DIS/HLA/SISO)
• Experience implementing and configuring training solution technologies across Live, Virtual, and Constructive (LVC) environments
• Experience working with external suppliers and vendors to deliver integrated technical solutions, including reviewing technical documentation to ensure alignment with system/architecture requirements and standards
• Experience supporting procurement or supply chain teams by translating technical specifications and integration requirements
• Understanding of interoperability standards or integration frameworks used within enterprise or defence systems
• Experience or knowledge of Combined Arms Virtual Simulations (CAVS) or Tactical Engagement Systems (TES)

What we offer

Be Part of a Groundbreaking Mission Join the UK’s most advanced defence training alliance, where industry experts converge to push boundaries and deliver excellence.

A Culture Built on Collaboration Work in an inclusive, high-performing team that celebrates ideas, supports growth, and is laser-focused on delivering results.

Team dynamics You will be part of a team that works together, across multiple organisations united in one mission.

Work Across Borders, United in Purpose Operate across organisations with one shared goal - improving capability across all domains.

Drive Innovation Your voice matters. We champion new ideas, welcome change, and believe in continuous improvement with a growth mind-set.

Shape the Future Play a crucial role in a long-term, future-facing programme with real-world impact on national defence.

Career Growth & Benefits Enjoy a strong benefits package, ongoing development opportunities, and clear pathways to progress within a trusted defence industry partner.

OMNIA® Training and its partners are proud to be an equal opportunity employer. We welcome applicants of all backgrounds and identities — what matters is your passion, your expertise, and your dedication to the mission.

This position is classified as: Hybrid: Employees who are working in Hybrid roles will work regularly both onsite and offsite. Ratio of time working onsite will be determined in partnership with your leader.

RTX adheres to the principles of equal employment.

All qualified applications will be given careful consideration without regard to ethnicity, color, religion, gender, sexual orientation or identity, national origin, age, disability, protected veteran status or any other characteristic protected by law.