Mechanical Designer

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About the position

About Plextek:

Plextek is an electronics design consultancy working on a diverse range of innovative and challenging technologies for the communications and electronics industries.

We provide consulting and design services across a broad range of sectors (consumer, industrial, automotive, medical and security & defence). Consequently, the work is varied, interesting and often technically challenging.

We are located 10 miles south of Cambridge in the semi-rural village of Great Chesterford, with ample parking, a direct train link to Cambridge and easy access to the M11.

About the role:

The Mechanical Design team are seeking to recruit an enthusiastic and flexible designer to enhance our mechanical design capability.  The successful candidate will have responsibility for the mechanical design elements of a wide range of projects and products both new and existing.

Design Consultancy work is varied and interesting. Our projects are largely based around Plextek’s core radio capability and range from low volume special equipment, through to complex consumer products designed for low cost, high volume manufacture. In addition, you will work on our own suite of products which range from vehicle tracking, through to biometric monitoring and solid-state radar.

This is a challenging role requiring a breadth of knowledge and experience rather than a narrow specialism.

Duties / Responsibilities:

Typically, though not limited to:

  • Liaison with other disciplines and working in project teams, provide input into project proposals, create design schemes and concepts.
  • Responsible for creative and innovative designs using the PTC Creo 3D CAD tool.
  • Hands-on development, including building prototypes and pre-certification testing of elements such as ingress protection sealing and/or mechanical integrity.
  • Produce drawings and BoMs and provide input into manufacturing data packs. Engineering drawings to BS8888. Geometric tolerancing. Tolerance analyses.
  • Be the technical lead at design reviews, provide technical support in client facing meetings.
  • Taking a project from concept through to manufacturer hand-over, provide client support and deal with suppliers both locally and across the globe.
  • Production of technical reports and presentations as well as providing concepts and contributing to proposals.

Although the role is based at our Great Chesterford office, some travel may be required in the UK and, occasionally, overseas.

Essential experience:

The successful candidate will be able to demonstrate understanding and experience of the following:

3D CAD packages, preferably Creo including document and revision control

Materials selection. Manufacturing and finishing processes.

Use of sealing techniques to provide ingress protection against liquids and solids.

Understanding of principles of EMC protection and rf isolation.

Knowledge of thermal control using both passive and active methods.

Corrosion prevention/protection strategies.

Practical working knowledge of mechanical strength, stress and strain, and torque forces.

Understanding of good design for assembly and both low and high volume manufacturing processes.

Working knowledge of diverse manufacturing process including injection-moulding, sand and die-casting, sheet metal fabrication, precision machining, 3d Printing in multiple materials as well as practiced use of appropriate rapid prototyping techniques.

Advantageous experience:

Knowledge of RF, Analogue & Digital layout considerations for mechanical design.

Experience of working directly with UK and Overseas sub-contract manufacturers.


Preferred Degree in Mechanical Design / Engineering, or a related discipline. Candidates with HNC/D will be considered, depending on experience.

Personal qualities:

Ability to integrate into and be a productive member of small project teams.

Good communication skills, including technical communication; both oral and written.

Ability to manage own time working independently, and work on a number of projects simultaneously.

Close attention to detail.

Flexibility to achieve project timescales when required.

Job Details

Job Reference Number: MD01

Position: Full time
Placement: Permanent


Company Pension Scheme

Permanent Health Insurance

Private Medical Insurance

Employee Assistance Programme

Life Assurance

25 Days Annual Leave pro rata

5 additional training days pro rata

Mentor programme

Free On-site Parking

Cycle to work scheme

Discounted cinema tickets & other benefits

Regular company social events