Freelancer UK
  • All Jobs
  • Outside IR35
  • Agencies
  • Post a Job
  • Pricing
  • Guides
  • Sign in
  • Sign up
  • All Jobs
  • Outside IR35
  • Agencies
  • Post a Job
  • Pricing
  • Guides

Email me jobs like this

Email me jobs like this
Refine Search
Refine by Categories
Engineering 4 Construction 1
Refine by Job Type
Contractor 5
Inside IR35 principal mechanical engineer

5 principal mechanical engineer jobs found

CL
Jun 13, 2026  
Principal Mechanical Engineer
Principal Mechanical Engineer - HVAC & Building Physics (Remote) Fully Remote £60/hr Inside IR35 12-Month Minimum Contract We're seeking an experienced Principal Mechanical Engineer to support a major defence infrastructure programme delivering critical M&E systems across Building C and Southern Services within the 10 Dock development. This is a fully remote, long-term contract opportunity focused on HVAC design, substantiation, and multidisciplinary coordination within a highly regulated environment. The Role You'll lead mechanical design activities across concept, scheme, and detailed design stages, with particular responsibility for HVAC systems supporting substation infrastructure and occupied operational spaces. Key responsibilities include: Delivery of RIBA Stage 3 and Stage 4 mechanical design HVAC and controls design for critical environments Design and substantiation of central and local ventilation systems Chilled water system design supporting electrical...
IR35 Status:
Inside IR35

CV-Library Warrington, Cheshire Contractor
CL
May 16, 2026  
Principal Thermal Engineer
World Class Defence Organisation based in Stevenage, Hertfordshire is currently looking to recruit a Principal Thermal Engineer Subcontractor on an initial 12 month contract.   Hourly Rate: £50.00  Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage Hybrid / Remote working: The role will likely be onsite 3 days per week. Duration: 12 Months with very likely extension. Contracts are often ongoing and long-term thereafter.  IR35 status: Inside IR35 (Umbrella) Interview process: One stage onsite interview   Principal Thermal Engineer Job Description: The Mechanical Analysis Group are looking for a Principal Thermal Engineer to join its team in Stevenage. The group consists of over 30 engineers working across a wide spectrum of cutting-edge military systems. Working for an internationally recognised company, you will play a critical role in ensuring that products deliver the necessary performance against key...
IR35 Status:
Inside IR35

CV-Library Stevenage, UK Contractor
CL
Mar 04, 2026  
Principal Structural Engineer
World Class Defence Organisation based in Stevenage, Hertfordshire is currently looking to recruit a Principal Structural Engineer subcontractor on an initial 12 month contract, with very likely extension.  The role will be onsite 4 days per week.     Candidates with a FE / FEA background ( Structural Engineer / Structural Analysis / Stress Engineer ) ideally from the Defence / Aerospace industry would be suitable for this position. Rate: £50.00 per hour Overtime Rate: Hours worked over the standard 37 hours per week, will be paid at ‘time and a quarter’ Location: Stevenage Hybrid / Remote working: The role will be onsite 4 days per week.  a 4-Day week of Monday to Thursday is possible. Duration: 12 Months with very likely extension. Contracts are often ongoing and long-term thereafter.  IR35 status: Inside IR35 (Umbrella) Interview process: One stage video interview   Principal Structural Engineer Job Description: The Mechanical Analysis Group are looking for a Principal...
IR35 Status:
Inside IR35

CV-Library Stevenage, UK Contractor
CL
Jun 12, 2026  
Associate / Associate Director Electrical Engineer
Job Title: Associate / Associate Director Electrical Engineer (x2) Location: National - Epsom, London, Peterborough, Cambridge (Hybrid Working) Salary: Up to £75 per hour Contract: 6 Months | Inside IR35 Start Date: ASAP Hours: 40 per week Working Pattern: Hybrid - 3 days office/site per week Vetting: C Clearance required Notice Period: 2 weeks Job Overview We are currently seeking two experienced Associate / Associate Director Electrical Engineers to lead the delivery of complex infrastructure projects within the UK Water and industrial sectors. This is a senior-level contract role offering the opportunity to take ownership of Electrical & ICA design delivery, lead technical teams, and contribute to high-profile, multi-disciplinary engineering programmes. The successful candidates will play a key role in driving technical excellence, ensuring compliance with industry standards, and supporting project delivery from design through to completion. Key...
IR35 Status:
Inside IR35

CV-Library United Kingdom Contractor
CL
Jun 12, 2026  
Principal Electronics Engineer
Principal Electronics Engineer Basildon 6-Month Contract Paying up to £75p/h (Inside IR35) Key Responsibilities Undertake project tasks covered by a statement of work, detailing input, processes and output together with cost/timescale constraints to ensure delivery of project objectives. Design of engineering solutions taking into account all requirements such as product quality, safety, reliability and testability. Present robust engineering solutions at design and peer reviews to ensure technical accuracy of specifications, designs and reports. Completing requirements capture, schematic capture and PCB Layout (Dx Designer and Expedition - Siemens EDA), circuit simulation, driving the design review process whilst collaborating with other engineering functions and manufacturing. High Speed Digital circuit design including use of LVDS, JESD204 and/or Ethernet communications. FPGA & Processor circuit design including use of DDR memory devices and supporting power and...
IR35 Status:
Inside IR35

CV-Library Basildon, Essex Contractor
  • Follow us on:
  • Facebook
  • Twitter
  • Instagram
  • LinkedIn
  • Home
  • Contact
  • About Us
  • Terms & Conditions
  • Employer
  • Post a Job
  • Search Resumes
  • Sign in
  • Job Seeker
  • Find Jobs
  • Outside IR35
  • Create Resume
  • Sign in
© 2008-2026 Powered by SmartJobBoard Job Board Software