Principal Mechanical Design Engineer

Location:

Essex

Sector:

Mechanical

Job type:

Permanent

Job reference:

RMW1242

Salary:

Up to 60k + benefits

An exciting opportunity has arisen for a Principal Mechanical Design Engineer to join one of the leading companies in RF and sensing technology, based in Essex.
Part of a globally recognised organisation, this company is driving innovation across the medical, aerospace, and defence industries. Their expertise has contributed to world-class projects such as the Hubble Space Telescope, cancer radiotherapy systems, and advanced driver-assistance technologies in luxury vehicles.
They are seeking a Principal Mechanical Design Engineer to join their Essex based R&D division, supporting the design and development of cutting-edge new products. This role is ideal for an engineer with several years of experience who enjoys hands-on design work, solving complex challenges, and collaborating within a multidisciplinary team.
Key Responsibilities
• Support the mechanical design and development of products from concept through to manufacture.
• Produce and maintain technical documentation, including drawings, models, and reports.
• Participate in design reviews and assist in resolving engineering challenges alongside senior engineers.
• Work closely with process, project, and manufacturing engineers to ensure designs meet performance, cost, and reliability targets.
• Contribute ideas for process improvement and new product development.
Desirable Experience
• Degree-qualified in Mechanical Engineering or a related discipline.
• Proficiency in 3D CAD (e.G. SolidWorks, Creo, or similar).
• Understanding of materials selection, mechanical systems, and manufacturing processes.
• Experience with FEA or tolerance analysis is advantageous.
• Strong problem-solving and teamwork skills.
• Keen to learn, develop, and take ownership of your projects.
Due to the nature of the work, our client is unable to offer sponsorship — UK working rights are required.
This is an excellent opportunity for an Essex based Principal Mechanical Design Engineer looking to take the next step in their career working on advanced technology and contributing to high-impact, real-world applications.
Apply Now: Please send your CV to or contact Ricky Wilcocks on for more information.