L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris Technologies is the Trusted Disruptor in the defense industry. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title – Design Engineer

Job Location – Brighton, UK

Job ID – 31223

About this opportunity and L3Harris UK

From 11 UK sites, our team of nearly 1,000 people delivers unique capabilities across space, air, land, sea and cyber for military, security and commercial customers across the UK and worldwide.

L3Harris in Brighton are part of Release Systems and the Mission Avionics sector operating in the Aerospace domain. Our mission-critical release systems equipment is on most major airborne fighter platforms worldwide, including the F-35, along with other aircraft like the Gripen and Typhoon. Brighton designs, manufactures and tests a large portion of its release systems portfolio. This facility offers 48,500 square feet of manufacturing space for the development of high-performance, multi-station solutions used to launch air-to-air and air-to-ground munitions from bay, wing or fuselage stations.

A few of our employee benefits are:

• Half day finish on a Friday
• 25 days holiday per year (plus bank holidays), increasing with long service and with the opportunity to buy/sell up to 5 days
• Private medical insurance with optional family cover
• Pension scheme of up to 8% employer contribution
• Life Assurance 4x salary (flexible up to 10x)
• Group income protection
• Flexible opt-in extras such as a health care cash plan, dental insurance, gym membership, critical illness cover and cycle to work scheme
• Employee Family Assistance Program providing mental health and wellbeing support
• Professional membership reimbursement (discretionary)

What the role will involve

The responsibilities of your role will include the following:

• Create robust mechanical and electro-mechanical design solutions from concept to production.
• Generate 3D CAD models, detailed drawings, and associated documentation (SolidWorks).
• Assess design feasibility with respect to functionality, manufacturability, cost, and material selection.
• Support prototyping, testing, and design validation activities; interpret results and adjust designs accordingly.
• Develop technical documentation including reports, specifications, and design justification.
• Collaborate with internal teams (manufacturing, quality, procurement) and external stakeholders (customers, suppliers).
• Lead or support technical investigations and root cause analysis.
• Recommend and implement design or process improvements to enhance efficiency and product performance.
• Provide guidance to less experienced engineers and support design reviews.

What you’ll bring 

The role requires the following experience and skills:

• Bachelor’s Degree in Mechanical Engineering or a related field, with a minimum of 4 years of relevant engineering experience, or in lieu of degree HNC/HND or equivalent qualification, with 8+ years of directly relevant design engineering Experience.
• Proficient in 3D CAD (SolidWorks preferred), including part, assembly, and drawing generation
• Knowledge of engineering principles, GD&T, BS8888, and tolerance stack-up
• Understanding of materials, manufacturing processes, and DFM/DFA principles
• Experience with PDM and ERP systems.
• Administration duties within PDM as required by Design Manager if requested.
• Compile design justifications and undertake appropriate report writing.
• Excellent time management, able to prioritise workload across multiple projects
• Ability to interpret and apply customer specifications and design standards
• Confident in assisting mechanical engineers presenting and defending design decisions internally and externally

Important to know

Due to the nature of our work many our roles require a UK nationality and the ability to obtain a security clearance. Applicants who accept a conditional offer of employment must meet the requirement of right to work in the UK and must meet eligibility requirements for access to classified information and will be subject to government security checks.

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L3Harris Technologies is proud to be an Equal Opportunity Employer. We are committed to maintaining a workplace that is free from unlawful discrimination and offers equal opportunities for all. Applications from individuals are encouraged regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief, and marriage and civil partnerships.