Principal Test Development Engineer

Date Posted:

2026-07-27



Country:

United Kingdom



Location:

Glenrothes, Fife



Position Role Type:

Onsite

At RTX, the world's largest aerospace and defence company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. 

Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defence.

Raytheon UK have a full time, permanent opportunity for a Principal Test Development Engineer to join our team on our Glenrothes and Livingston sites.

Our Principal Test Development Engineer role is a fantastic opportunity to challenge you and continue to develop your knowledge. Due to the nature of our work and the variety of customer requirements, you will often need R&D to find a solid solution. As such, you will have great opportunities to engage with the customer, mentor / support more junior team members and stretch your technical knowledge. Additionally, we expect this team to have significant growth in the near future and there will be future opportunities to develop your career.

As Principal Test Development Engineer, you will be responsible for the design, manufacture, verification and validation, along with through life technical support of board level, sub-system and system level test equipment. You’ll work on technologies that support Control Actuation Systems, Guidance Electronics, and cutting-edge GPS Anti-Jamming systems across land, sea, air—and space.

We are excited to offer, as well as, our competitive package and great career development - a Welcome Bonus of £10k!

*Please note, successful applicants must be eligible to complete and obtain BPSS level clearance*

Key responsibilities:

• Design of functional test equipment for circuit cards, sub-assembly's and systems.

• Design and overall quality of the test equipment, including review processes.

• Provide leadership and guidance for junior engineers, and support with resource planning.

• Documentation of design specifications and implementation details. Take part in design reviews. Upholding of design standards and methodologies.

• Realisation of complex system requirements to provide robust and reliable test hardware solutions.

• Work closely with external customers and suppliers.

• Responsibility for the complete implementation of detailed technical items and an understanding/appreciation of system level items.

• Collaboration with other team members (including both hardware and software engineers) to agree system designs, interfaces and protocols etc.

• Development of appropriate test hardware, test software and procedures, both informal and formal, to prove the correct operation of hardware.

• Provide support for the test hardware and manage obsolescence throughout its lifecycle.

• Accountable for engineering specific risks and opportunities.                       

• Contributor/Approver for standard/tailored test development process including Design Review gates and content

Required Experience:

• Test software design experience

• Excellent knowledge of analogue and digital electronic circuit design

• Ability to write comprehensive technical design documentation

• Proven experience in handover and management of designs in production

• Excellent hardware troubleshooting skills

• Able to support/debug system integration

• Must be eligible for BPSS clearance and, ideally SC level

Desirable Experience:

• Significant test development experience in industry.

• Use of Mentor Graphics schematic entry and PCB layout tools.

• Understanding of common test architectures PXI/d LXI

• Measurement Uncertainty and its application in test equipment design and validation

• Software Certification or detailed knowledge of: NI LabView, NI CVI, NI TestStand, C#

• Design of mix signal circuits

• High speed serial networks

• An appreciation of RF electronics

• Knowledge of power supply design

Benefits and Work Culture:

• Competitive salary

• Welcome / Joining Bonus £10k *

• Relocation support *

• 37hr working week, with an early finish Friday or compressed hours, start your weekend early!

• 25 days holiday, plus public holidays, opportunity to buy / sell / roll over up to 5 days, and up to 5 days volunteering annually.

• Contributory Pension Scheme (up to 10.5% company contribution)

• Company bonus scheme (discretionary).

• 6 times salary ‘Life Assurance’ with pension.

• Flexible Benefits scheme with extensive salary sacrifice schemes, including Health Cashplan, Dental, and Cycle to Work amongst others.

• Enhanced sick pay.

• Enhanced family friendly policies including enhanced maternity, paternity & shared parental leave.

• Private Medical Insurance (dependant on grade)

 

Raytheon UK 

At Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence.

Joining our team means being part of an organisation that shapes the future of national security whilst investing in your growth and personal development. We provide a collaborative environment, abundant opportunities for professional development, and a profound sense of purpose in what we do. Together, we are not just advancing technology; we're building a community committed to safeguarding a safer and more connected world.

The manufacture of Control Actuation Systems, Guidance Electronic Units and Power Products. The UK’s only Global Factory for UK & US missile programmes.

The provision of GPS Anti-Jamming systems across domains. Raytheon UK’s long heritage of AJ GPS Technology can be found on land, air and maritime platforms.

Dedicated high volume Space Grade manufacturing facility with CCA lines qualified for Space, all supported by a highly skilled experienced workforce.

RTX

Raytheon UK is a landed company and part of the wider RTX organisation. Headquartered in Arlington, Virginia, USA, but with over 180,000 employees globally across every continent, RTX provides advanced systems and services for commercial, military and government customers worldwide and comprises three industry-leading businesses – Collins Aerospace Systems, Pratt & Whitney, and Raytheon.

Supporting over 35,000 jobs across 13 UK sites, RTX is helping to drive prosperity. Each year our work contributes over £2.7bn to the UK economy and offers a wealth of opportunities to 4,000 suppliers across England, Scotland, Wales and Northern Ireland. We’re investing in all corners of the country, supporting 29,040 jobs in England, 3,040 in Northern Ireland, 1,900 in Scotland and 1,600 in Wales.

Please ensure the role type defined below is appropriate for your needs before applying to this role. 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.

Candidates will learn more about role type and current site status throughout the recruiting process. For onsite and hybrid roles, commuting to and from the assigned site is the employee’s personal responsibility.

Requires advanced to expert knowledge of work area typically obtained through advanced education combined with experience.

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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.  

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