The Mechanical Design Engineer will be responsible for carrying out the duties of the Engineering department, including design, prototyping, design proving, engineering documentation, and supporting calculations.
A key requirement of this role is the ability to obtain and maintain a high‑level security clearance. If you do not currently hold the required clearance, we can support you through the application process. DV Clearance will be required for the role - applicants should either already hold a DV or being prepared to go through an application immediately.
This position will require an on-site presence in Ampthill, Bedfordshire.
The role demands a high level of innovative thinking and the ability to synthesise ideas into functioning and manufacturable products that are compliant to design specifications and applicable legislation. Working within a team of engineers and Design Authorities to design and develop high integrity components, complex mechanisms and linkages that will function and be durable in challenging environments.
Responsibilities and Duties
- Use requirements specifications and a design brief to develop innovative yet robust design solutions that are compliant and fit for purpose.
- Use CREO Parametric CAD to produce both concept and detail designs.
- Produce supporting calculations and analysis to justify design decisions.
- Work with SMEs, Users and Design Authorities to develop concept design solutions.
- Work with a team of Design Engineers with agreed interfaces to develop a single sub-system design solution.
- Work with CAD engineers to enable the production of drawings and design data pack.
- Create and present Design Review data packs to Senior Engineers and Governors.
- Assist with the production of prototypes and confirm designs with manufacturing/purchasing teams.
- Perform physical testing and design proving activities on engineering prototypes.
- Ensure components and assemblies adhere to applicable, industry and business standards.
- Ensure components and assemblies adhere to applicable programme safety requirements and governing safety legislation.
- Must be able to work in the UK without restrictions in accordance with UK National Law and be prepared to successfully undertake an appropriate level of UK National Security Vetting according to UK Government National Security Vetting criteria: DV Clearance will be required for the role - applicants should either already hold a DV or being prepared to go through an application immediately.
- Experience of working within the defence industry working within the Aeropace or Space domain considered a strong advantage for this role.
- Proven, direct experience in the design and development of mechanical sub-systems and components.
- Proven, direct experience in the design and specification of electrical interfaces for sub-systems and components.
- Understanding of current materials, treatments and finishing technology for use in Defence, Aerospace and Space products.
- Working knowledge of CREO CAD software and experience of using the tool to produce complex parametric designs.
- Able to use Windchill PDM system.
- Knowledge of complex mechanism design and principles.
- Ability to perform basic structural and kinematic calculations.
- Proven track record of successful design and product development for use in harsh environments.
- Impeccable attention to design detail and able to produce high standards of documentation.
- Ability to plan, schedule, coordinate and problem solve effectively both as an individual and as part of team solve effectively.
Skills Required
- Must be able to work in the UK without restrictions under UK National Law.
- Must successfully undertake the required UK National Security Vetting and obtain DV Clearance, or be prepared to begin the application immediately.
- Proven direct experience designing and developing mechanical subsystems and components.
- Proven direct experience designing and specifying electrical interfaces for subsystems and components.
- Understanding of materials, treatments, and finishing technologies for defense, aerospace, and space products.
- Working knowledge of CREO CAD and experience producing complex parametric designs.
- Ability to use the Windchill PDM system.
- Knowledge of complex mechanism design principles.
- Ability to perform basic structural and kinematic calculations.
- Track record of successful design and product development for harsh environments.
- High attention to design detail and ability to produce high-standard documentation.
- Ability to plan, schedule, coordinate, and solve problems independently and within a team.
- Experience in the defense industry, particularly the aerospace or space domain.
Lockheed Martin Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Lockheed Martin and has not been reviewed or approved by Lockheed Martin.
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Retirement Support — Retirement benefits are described as a standout element, with a strong 401(k) program and options like an employee stock purchase plan. Feedback suggests these features meaningfully enhance total compensation and long‑term financial security.
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Healthcare Strength — Healthcare coverage is portrayed as comprehensive from day one, with multiple plan options, mental health resources, and virtual care. Wellness supports such as on‑site services and preventive programs are also highlighted.
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Flexible Benefits — Work arrangements often include compressed schedules and telework, contributing to a favorable work‑life balance. Feedback suggests this flexibility is a key reason many view the overall package positively.
Lockheed Martin Insights
What We Do
Customer Focus, Innovation and Purpose are Built Into Everything We Do. Lockheed Martin. Your Mission is Ours ™. Headquartered in Bethesda, Maryland, Lockheed Martin is a global security and aerospace company principally engaged in the research, design, development, manufacture, integration and sustainment of advanced technology systems, products and services.







