Date Posted:

2026-02-05

Country:

United Kingdom

Location:

GB-ESS-HARLOW-002 ~ Kao One ~ BLDG V

Position Role Type:

Onsite

Senior Systems Engineer – APNT

Location: Harlow

Contract: Permanent

Hours: Full time (37 hours)

SC

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. 

About the role:

This is an exciting opportunity for a Senior Systems Engineer to work within the Raytheon Assured Position Navigation and Timing Systems team, part of the wider Systems & Products business unit, to produce Digital GPS Anti-Jam Systems and Alternative Navigation Solutions for the military market.

The role will provide support across Raytheon’s range of APNT products, providing Systems Engineering expertise across the product lifecycle, from requirements capture, analysis, design through to testing, qualification, and certification activities.

Skills and Experience

Requirements

• Experience across the systems engineering lifecycle from requirements through to project completion.
• Experience with generation of technical documentation at all levels.
• Understanding of policies, practises and procedures, and the ability to communicate these to their team.
• Ability to work in a team and perform to project directives.
• Ability to work autonomously, with limited oversight from Team Leaders and Management.
• Degree in STEM (Science, Technology, Electrical Engineering, Mathematics) or similar industry certification

Desirable

• Knowledge of GNSS systems and receiver characteristics
• Experience with the IBM Rational DOORS toolset
• Experience with RF (including Antennas) and Digital Hardware design and test
• Experience in verification & validation, including environmental and EMC testing
• Algorithm development incorporating Modelling experience in MATLAB/Simulink
• Experience with SysMl or UML in a Systems Engineering environment
• Experience with configuration management systems

Responsibilities

• Supporting our flagship and next generation products, this role will provide support to the APNT System Design Authority and Systems Engineering Lead with the development and management of system architecture and requirement.
• System definition and analysis, generation of technical procedures and reports.
• Participation in engineering design reviews, generation of bid proposal material, response to customer technical requests, production support and obsolescence management.
• Undertake development studies and investigation activities involving product performance and interfacing with various internal stakeholders.
• The role will involve working in a highly technical environment, supporting the team as well as working autonomously.
• Laboratory work will be involved for product testing. Taking on complex challenges and producing a solution that follows company process in a timely manner is an essential part of the role.
• A successful candidate will be comfortable integrating into a large team to accomplish their goals.

Benefits and Work Culture

Benefits

• Competitive salaries.
• 25 days holiday + statutory public holidays, plus opportunity to buy and sell up to 5 days (37hr)
• 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.
• Car / Car allowance (dependant on grade/ role)
• Private Medical Insurance (dependant on grade)

Work Culture

• 37hr working week, although hours may vary depending on role, job requirement or site-specific arrangements.
• Early 1.30pm finish Friday, start your weekend early!
• Remote, hybrid and site based working opportunities, dependant on your needs and the requirements of the role.
• A grownup flexible working culture that is output, not time spent at desk, focussed. More formal flexible working arrangements can also be requested and assessed subject to the role. Please enquire or highlight any request to our Talent Acquisition team to explore the flexible working possibilities.
• Up to 5 paid days volunteering each year.

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.

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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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