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Contractor 7
Engineering Inside IR35 principal structural engineer

7 principal structural engineer jobs found

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
Mar 04, 2026  
Principal Structural Engineer
On behalf of our client, we are seeking to recruit a Principal Structural Engineer on an initial 12-month contract. As the Principal Structural Engineer, you will play a key role in delivering high-quality structural analysis across a range of advanced defence systems, supporting design development and ensuring compliance with critical structural requirements. Role: Principal Structural Engineer Pay: £50 per hour Via Umbrella Location: Stevenage Contract: Monday- Friday, 37 Hours per week, 12 Months Contract IR35 Status: Inside Security Clearance: SC Required before starting Responsibilities Perform and lead structural analysis using hand calculations and Finite Element methods. Provide technical expertise across static, dynamic, fatigue, and crash analysis. Develop and optimise FE models to support and improve design solutions. Deliver rapid structural assessments to support efficient design progression. Communicate analysis results clearly to influence design and...
IR35 Status:
Inside IR35

CV-Library Stevenage, Hertfordshire Contractor
CL
Mar 04, 2026  
Principal Structural Engineer
Job Title Principal Structural Engineer Stevenage 4 days onsite, 1 WFH Contract Details 12 month contract £50 per hour Inside IR35 Overview A leading engineering organisation operating in the defence and advanced systems sector is looking to engage a Principal Structural Engineer to support complex mechanical analysis activities. You will join an established structural analysis function working on high integrity, safety critical products. This role suits someone who is technically strong, decisive, and comfortable owning complex analysis tasks from concept through to delivery. Key Responsibilities You will be responsible for delivering high quality structural analysis to ensure products meet demanding performance and regulatory requirements. The role involves supporting design teams with both detailed and rapid assessments to enable efficient design progression. Required Skills and Experience Degree qualified in a STEM subject. Strong background in structural analysis...
IR35 Status:
Inside IR35

CV-Library Stevenage, Hertfordshire Contractor
CL
Mar 05, 2026  
Principal Structural Mechanical Engineer
Principal Structural Mechanical Engineer JOB LOCATION: Stevenage SECURITY CLEARANCE LEVEL: SC to Start DURATION: 12+ Months (Possible Extension) WORK PATTERN: Min 4 Days a Week on Site; Possibly 1 Remote - Compressed Week Potentially Available. PAY RATE: £ 50 Per Hour Umbrella Inside IR35 Essential QUALIFICATIONS Ideally degree qualified; STEM subjects. TARGET INDUSTRIES AND COMPANIES. Is Defence a must? If not what industries can be considered Ideally Def/Aero background. Open to others if skillset matches. Essential Skillset & Tools Alter FE toolset; experience in alternative FE codes would be considered (). As Seen on JD. Overview: The Mechanical Analysis Group are looking for a Principal Structural Engineer to join its team in Stevenage. The group consists of over fifty engineers working across a wide spectrum of cutting-edge military systems. Responsibilities: Working for an internationally recognised company, you will play a critical role in ensuring that products deliver...
IR35 Status:
Inside IR35

CV-Library Stevenage, Hertfordshire Contractor
CL
Mar 04, 2026  
Principal Mechanical Design Engineer
Principal Mechanical Design Engineer JOB LOCATION: STEVENAGE OR BRISTOL SECURITY: SC - Potential BPSS start (UKEO) DURATION: 6+ Months (Extension Possible if Meeting Expectations) TYPE: Contract WORK PATTERN: 4 days a week on site; 1 remote (flexible over start/finish time). PAY RATE: £ 50 /hr (Umbrella Inside IR35) Essential QUALIFICATIONS Beneficial- HND or HNC in Mech Engineering TARGET INDUSTRIES AND COMPANIES. Is Defence a must? If not what industries can be considered * Preferable for Def/Aero; if hitting the skills on JD, open to others; automotive, oil & gas etc. Essential Skillset & Tools * Experience using Creo 3D design tool Essential- Knowledge of the following: * Manufacturing processes * Tolerance studies * Mass property calculations * Material selection * FMEA * Design for Manufacture/Assembly * Structural design * Product Lifecycles * Industrial validation * An ability to work as part of a multifunctional...
IR35 Status:
Inside IR35

CV-Library Stevenage, Hertfordshire Contractor
CL
Mar 07, 2026  
Senior or Principal Mechanical Engineer
Contract Opportunity: Senior / Principal Mechanical Engineer Sellafield MSSS-OBLM Projects £51-£61 per hour (Inside IR35) Hybrid - 3 days per week in Warrington Sector: Nuclear | MSSS-OBLM Programme Are you an experienced Senior or Principal Mechanical Engineer looking to play a key role on one of Sellafield's most critical programmes? This opportunity sits within the MSSS-OBLM (Multi-Storey Seismic Stores - On-Balance Legacy Materials) projects, delivering essential mechanical engineering support to safety-critical, legacy nuclear infrastructure. You'll provide technical leadership and delivery assurance across task-based mechanical work packages, supporting the safe progression of complex designs within a highly regulated environment. The role offers a hybrid working model, balancing collaboration in Warrington with remote working flexibility. Key Responsibilities Deliver and manage mechanical engineering tasks across MSSS-OBLM project scopes Develop, review and approve...
IR35 Status:
Inside IR35

CV-Library Cumbria, UK Contractor
CL
Feb 28, 2026  
Principal Software Engineer
Contract Software Engineer (Ada) – Real-Time Embedded Location: Luton (Hybrid – ~4 days on-site) Contract Length: 12 months IR35: Inside IR35 Rate: £57.72 p/h PAYE (£66.11p/h inc. holiday rate) OR £78.70 p/h Umbrella We seek an engineer with recent high-integrity or safety-critical industry experience (defence, aerospace, or similar), or eligible for UK security clearance. The Opportunity We’re looking for an experienced real-time embedded Ada engineer to work on mission-critical defensive systems within a highly technical electronic warfare environment. This is a hands-on role developing, integrating, and testing high-integrity software that directly supports operational capability. You’ll be trusted with complex problems, work closely with systems, hardware, and firmware teams, and play a key role across the full software lifecycle. What You’ll Do Design, develop, debug, and test real-time embedded software in Ada Own complex work packages from requirements through...
IR35 Status:
Inside IR35

CV-Library Luton, UK Contractor
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