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Engineering senior mechanical engineer

121 senior mechanical engineer jobs found

CL
Feb 21, 2026  
Senior Mechanical Engineer
Senior Mechanical Engineer Basildon, Essex (4 day/week on site) £63ph (Inside IR35) Initial 9 month contract **Please note we can only consider sole UK Nationals for this role** We are currently looking for a Senior Mechanical Engineer to join the Precision Guidance Integrated Project Team (IPT), working on equipment for the next generation of Missile Seeker Programmes. What you'll do as a Senior Mechanical Engineer: Support senior members of staff in the delivery of technical solutions on critical Business Programmes. Generation of mechanical solutions to relevant company and international standards. Design of engineering solutions taking into account all requirements including product quality, safety, reliability, testability, sustainability, etc. Mechanical engineering detailed design, including numerical calculations, tolerance studies, etc. Produce Manufacturing Data Packs in line with BS8888 including appropriate application of GD&T. Generate BoM within approve PLM...
IR35 Status:
Inside IR35

CV-Library Basildon, Essex Contractor
CL
Feb 21, 2026  
Senior Mechanical Engineer
Senior Mechanical Engineer – Leading Asset Integrity at Wytch Farm Oilfield Step into a pivotal role at one of the UK’s most dynamic onshore oilfields. As a Senior Mechanical (Integrity) Engineer based at the Wytch Farm oilfield near Corfe Castle, Dorset, you will be at the forefront of ensuring the mechanical integrity and safety of critical static equipment. This is an exciting opportunity to apply your expertise in a high-impact environment, taking ownership of integrity risks and regulatory compliance to safeguard asset performance and environmental standards. You will lead senior mechanical engineering tasks, including approval of piping isometrics, purchase specifications, and quality documentation, while maintaining close collaboration across internal teams and external stakeholders. Your expert judgment will guide the management of asset risk in line with industry best practices and safety legislation such as PSSR, PSR, and COMAH. Required Skills Proven expertise...
IR35 Status:
Unknown Status

CV-Library Wareham BH20, UK Contractor
CL
Feb 21, 2026  
Senior Mechanical Engineer - Contract
Senior Mechanical Engineer – Contract Consultancy Location: Southampton Project Location: London Contract Length: Approx. 9 months RIBA Stages: Stage 3 possibly progressing into Stage 4 Sector: High-rise Residential / Leisure / Hotel The Role: An established Building Services consultancy based in Southampton is seeking an experienced Senior Mechanical Engineer to support delivery of a major high-rise residential tower project in central London. This is a contract position focused on detailed design delivery at RIBA Stage 3, with a strong pipeline into Stage 4. You will be joining a technically strong, design-led engineering team working across residential, leisure and hotel elements on a complex, high-profile scheme. Key Responsibilities: Lead mechanical building services design through RIBA Stage 3 and into Stage 4 Deliver detailed designs for HVAC, ventilation, heating and cooling systems, plant and controls Coordinate with electrical, public health and...
IR35 Status:
Unknown Status

CV-Library Southampton, UK Contractor
CL
Feb 20, 2026  
Senior Mechanical Engineer
Our client, a large Aerospace and Defence supplier is looking for a Mechanical Design Engineer to join them on a contract basis at their site in Basildon. Due to the nature of the project, applicants must hold the sole British nationality and hold SC Clearance. 6 month initial contract Location: Basildon, 4 day per week onsite Rate: £64.22 p/h UmbrellaKey Responsibility Areas Support senior members of staff in the delivery of technical solutions on critical Business Programmes. Generation of mechanical solutions to relevant company and international standards. Design of engineering solutions taking into account all requirements including product quality, safety, reliability, testability, sustainability, etc. Mechanical engineering detailed design, including numerical calculations, tolerance studies, etc. Produce Manufacturing Data Packs in line with BS8888 including appropriate application of GD&T. Generate BoM within approve PLM system (Teamcenter). Contribute to reviews of...
IR35 Status:
Unknown Status

CV-Library Basildon, Essex Contractor
CL
Feb 19, 2026  
Senior Mechanical Engineer
Senior Mechanical Engineer - Nuclear (SRP / Sellafield) Hybrid - 3 days in Warrington office 18-month contract 40 hours per week BPSS clearance required £55 Inside IR35 Overview We are recruiting a Senior Mechanical Engineer to support delivery of the Sellafield Product and Residue Store Retreatment Plant (SRP). You'll be embedded within the PPP delivery team, providing hands-on mechanical engineering expertise across design, manufacture, testing and integration of complex plant and equipment. This is a long-term opportunity on a high-profile nuclear programme with real national impact. Key Responsibilities Deliver mechanical engineering work packages to agreed time, cost and quality Produce high-quality design deliverables (specs, drawings, analyses, verification) Develop safe, fit-for-purpose, integrated design solutions Ensure designs are suitable for manufacture, construction, commissioning, operation and decommissioning Manage and direct designers producing...
IR35 Status:
Inside IR35

CV-Library Warrington, Cheshire Contractor
CL
Feb 18, 2026  
Senior Mechanical Engineer
Senior Mechanical Engineer - Nuclear/Defence Sector Location: Preston (3 days per week) Contract Length: 12 Months Rate: £52-£60 per hour based on years experience (Inside IR35) A leading nuclear organisation in the UK is seeking a highly skilled Senior Mechanical Engineer to join a prestigious and high-profile project within the nuclear and defence sectors. This is an excellent opportunity for a senior engineer to contribute to the development of critical systems on a significant project. Key Responsibilities: Provide expert technical support within specialist design areas, ensuring adherence to project deadlines and objectives. Review and approve technical documents, designs, calculations, analyses, drawings, and models, ensuring that they meet the highest standards for design documents and technical reports. Make key engineering decisions from both a project and technical standpoint, ensuring alignment with overall project goals. Act as the Technical Authority or Lead...
IR35 Status:
Inside IR35

CV-Library Preston, UK Contractor
CL
Feb 18, 2026  
Senior Mechanical Engineer
A leading nuclear organisation in the UK is seeking a highly skilled Senior Mechanical Engineer to join a prestigious and high-profile project within the nuclear and defence sectors. This is an excellent opportunity for a senior engineer to contribute to the development of critical systems on a significant project. Senior Mechanical Engineer - Nuclear/Defence Sector Location: Warrington (3 days per week) Contract Length: 12 Months Rate: £52-£60 per hour based on years experience (Inside IR35) Key Responsibilities: Provide expert technical support within specialist design areas, ensuring adherence to project deadlines and objectives. Review and approve technical documents, designs, calculations, analyses, drawings, and models, ensuring that they meet the highest standards for design documents and technical reports. Make key engineering decisions from both a project and technical standpoint, ensuring alignment with overall project goals. Act as the Technical Authority or Lead...
IR35 Status:
Inside IR35

CV-Library Warrington, UK Contractor
CL
Feb 08, 2026  
Senior Mechanical Engineer
OLG Recruitment are recruiting for a Senior Mechanical Engineer to work for a client based in Warrington. This is a full time contract position, for approximately 18 months. 3 Days in office, 2 days from home. This is role is Inside IR35. Basic purpose: Senior Mech Engineer – Required to deliver work packages across various system scope, in a wide variety of mechanical handling and lifting problem solving scenarios. Essential. * CEng/IEng status * Experienced in delivering fit for purpose mechanical design solutions to cost and schedule. * Ability to break down a problem/issue into constituent parts and present options for resolution. * Able to contribute to the production of, deliver to, and report on plans of work. * Able to communicate both verbally and in writing with a variety of stakeholders. * Has a working knowledge and understanding of regulations relevant to the delivery of machinery (SOMSR 2008, CDM, PUWER, LOLER etc.) * Is familiar with...
IR35 Status:
Inside IR35

CV-Library WA3, Risley, Warrington Contractor
CL
Feb 19, 2026  
Senior Mechanical Design Engineer
We are seeking a Senior Mechanical Design Engineer for an exciting 6-month project based in Norwich. This is a high-profile, large-scale project, offering the opportunity to work on cutting-edge engineering systems. Contract Details: Duration: 6 months Location: Norwich IR35: Outside Rate: Negotiable Key Responsibilities: Design and development of vessel systems and pressure systems Preparation of mechanical design reports, calculations, and FEA analysis Design and fabrication of sheet metal components Work closely with the project team to ensure designs meet technical, safety, and regulatory requirements Provide innovative solutions to complex engineering challenges Essential Skills & Experience: Proven experience in mechanical design for vessel/pressure systems Proficient in SolidWorks Strong background in FEA analysis, design calculations, and reporting Experience in sheet metal design and fabrication Ability to work independently and deliver results in a...
IR35 Status:
Outside IR35

CV-Library Norwich, Norfolk Contractor
CL
Feb 05, 2026  
Senior Mechanical Design Engineer
Senior Mechanical Design Engineer - MEP London Contract (Outside IR35) Hybrid - 3 days a week in Office Rate: £45/hr - £50/hr A consultancy we are partnered with is looking for a contract senior mechanical design engineer to work on a contract basis in their London office. Consultancy or contractor background welcome, working on various sectors, notably commercial, residential and education. Proficiency in Revit desirable but not required. Contract length is like to be 6 months rolling. Looking to start someone end of Feb/beginning of March. If you are interested please apply with your CV
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
Jan 25, 2026  
Product Design Engineering Product Specialist - CAD
Product Design Engineer Product Specialist - Mechanical CAD (Contract) Darlington (Hybrid: 3 days Onsite / 2 days Remote) Initial 6 Months (Expected to extend long-term through Aug 2026 and beyond) Join a leading industrial organization at their Darlington site as a Product Design Engineer. This is a senior-level, product-focused contract role where you will apply specialised knowledge of engineering principles and design practices to lead complex mechanical design and development assignments. You will be responsible for creating optimized design concepts and mechanical design specifications for products, parts, components, and systems, ensuring they meet rigorous standards for performance, reliability, durability, and serviceability. Key Responsibilities: Lead design and development for complex engineering assignments. Apply specialized knowledge to create optimized design concepts and specifications. Lead cross-functional design integration and decision-making (Critical...
IR35 Status:
Unknown Status

CV-Library Darlington, UK Contractor
CL
Feb 19, 2026  
Senior Technical Engineer
On behalf of FCDO, we are looking for a Senior Technical Engineer Outside IR35 on a 12 months contract based Hybrid 2-3 days a week in London The Foreign, Commonwealth & Development Office (FCDO) pursues our national interests and projects the UK as a force for good in the world. We promote the interests of British citizens, safeguard the UK's security, defend our values, reduce poverty, and tackle global challenges with our international partners. DV Clearance is an essential requirement for this role, as a minimum you must be willing & eligible to undergo checks. Please note, due to the exceptional requirements of this position (short-term nature of this role and speed at which we require a postholder in situ) preference may be given to candidates who meet all of the essential criteria and hold active security clearance. As a Senior Technical Engineer , your main responsibilities will be to: * As part of the OED Overseas Maintenance Strategy, support the...
IR35 Status:
Outside IR35

CV-Library City of London, London Contractor
CL
Feb 21, 2026  
Maintenance Engineer -OUTSIDE IR35 - FMCG- Contract
Maintenance Engineer Bolton area Greater Manchester needed for a 4 on 4 off with overtime this is a hands on role working for an international manufacturer and YOU MUST have experience of maintaining machinery in a manufacturing environment. Maintenance Engineer based Greater Manchester £35+ Outside IR35 Multi Skilled role working for a high speed packaging manufacturer Maintenance Engineer must have FMCG experience Maintenance Engineer is an Outside IR35 Contract Excellent money Long term contract Overtime available Maintenance Engineer will be working for a very friendly company and team, staff really enjoy working here and are treated well with lots of career progression and opportunity to enhance on skill set, extra courses and development. The company like to promote from within and have opportunities to do this if you wish as well as further progress skills. Maintenance Engineer Desired Skills and Experience Mechanical or Electrical qualification or...
IR35 Status:
Outside IR35

CV-Library Bolton, Greater Manchester Contractor
CL
Feb 21, 2026  
Senior Electrical Engineer - Contract
Senior Electrical Engineer – Contract Consultancy Location: Southampton Project Location: London Contract Length: Approx. 9 months RIBA Stages: Stage 3 possibly progressing into Stage 4 Sector: High-rise Residential / Leisure / Hotel The Role: A well-established Building Services consultancy headquartered in Southampton is looking to appoint a Senior Electrical Engineer on a contract basis, supporting delivery of a landmark residential tower project in London. The role will involve leading electrical services design at RIBA Stage 3, with anticipated progression into Stage 4, across a complex mixed-use scheme. Key Responsibilities: Lead electrical building services design through RIBA Stage 3 and 4 Design power distribution, lighting, emergency systems, fire alarm, data and communications Coordinate closely with mechanical and architectural teams Prepare specifications, drawings and technical reports Attend and contribute to design and coordination meetings Key...
IR35 Status:
Unknown Status

CV-Library Southampton, UK Contractor
CL
Feb 20, 2026  
Senior Pipeline Engineer
We are seeking an experienced Senior Pipeline Engineer (Mechanical) to support the delivery of pipeline engineering work on a 12-month freelance contract, operating Outside IR35. The role will focus on providing high-level mechanical pipeline expertise across design and delivery phases, working closely with multidisciplinary teams and key stakeholders. Key Responsibilities * Lead and deliver mechanical pipeline engineering activities across assigned projects * Produce, review and approve pipeline design deliverables including calculations, specifications and reports * Ensure designs comply with relevant codes and standards (e.g. PD 8010, ASME, API, DNV, BS EN) * Undertake wall thickness calculations, material selection and stress analysis * Provide technical input into route selection, constructability and installation methodologies * Participate in HAZID, HAZOP and design review workshops * Interface with civil,...
IR35 Status:
Outside IR35

CV-Library Redcar, Redcar and Cleveland Contractor
CL
Feb 20, 2026  
Senior Pipeline Engineer
We are seeking an experienced Senior Pipeline Engineer (Mechanical) to support the delivery of pipeline engineering work on a 12-month freelance contract, operating Outside IR35. The role will focus on providing high-level mechanical pipeline expertise across design and delivery phases, working closely with multidisciplinary teams and key stakeholders. Key Responsibilities * Lead and deliver mechanical pipeline engineering activities across assigned projects * Produce, review and approve pipeline design deliverables including calculations, specifications and reports * Ensure designs comply with relevant codes and standards (e.g. PD 8010, ASME, API, DNV, BS EN) * Undertake wall thickness calculations, material selection and stress analysis * Provide technical input into route selection, constructability and installation methodologies * Participate in HAZID, HAZOP and design review workshops * Interface with civil,...
IR35 Status:
Outside IR35

CV-Library Redcar, Redcar and Cleveland Contractor
CL
Feb 20, 2026  
Mechanical Design Engineer
Job Title: Mechanical Design Engineer - Water Projects (AMP8 Framework) Role: Electrical Design Engineer Location: Leeds (Hybrid working - but must be located commutable to Leeds) Pay: £45-£55 per hour - LTD Company/Outside IR35 (DOE) Duration: On-going minimum 12 months. Industry: Water/Wastewater Treatment (AMP8) Overview: We are seeking a Senior Mechanical Design Engineer with strong experience in the water sector to support high-profile projects as part of our clients AMP8 investment programme. This role is embedded within a multidisciplinary engineering team and focuses on delivering design and technical assurance for water and wastewater treatment schemes across the multiple Water regions. This is a fantastic opportunity to contribute to long-term, sustainable water infrastructure improvements through technically rewarding project work in a flexible and collaborative setting. Key Responsibilities: ·Deliver mechanical design solutions for complex water and...
IR35 Status:
Outside IR35

CV-Library Leeds, UK Contractor
CL
Feb 20, 2026  
Principal Mechanical Engineer
Job title: Principal Mechanical Engineer Job Type: Contract IR35 Status: Inside IR35 Start date: As soon as possible subject to security clearance Duration: 12+ months Salary/ Pay rate/ Benefits: £60-£69 per hr *Umb Location: Warrington / Hybrid - 2 or 3 days per week working from the office. Hours of work: 37-40 hours per week Mon-Fri About the Role: 6‑month design development phase, with continued involvement during procurement We are seeking an experienced Principal Mechanical Engineer to lead the mechanical engineering discipline across a major project, with responsibility for delivering high‑quality design outputs, managing technical interfaces, and guiding a team of engineers. You will act as the primary authority for mechanical engineering within the project and work closely with multidisciplinary teams, clients, and stakeholders to ensure successful delivery of all mechanical design requirements This role involves taking a lead position in the development of key...
IR35 Status:
Inside IR35

CV-Library Warrington, Cheshire Contractor
CL
Feb 19, 2026  
Project Manager
Senior Project Engineer / Project Manager (Contract) 6–9 Month Contract Approx £400 Day Rate Location: Coventry – Onsite, Monday to Friday Our client is a well-established engineering business specialising in complex mechanical systems and powder/material handling equipment is seeking an experienced Senior Project Engineer / Project Manager to join their expanding project portfolio. Operating from its own manufacturing, testing, and development facilities, the company supplies cutting-edge equipment to customers worldwide About the Role This is a hands-on senior position with a dynamic split of responsibilities: 60% Project Management / 40% Engineering. You will lead projects from concept to completion while actively contributing to engineering documentation, modelling, and development, directly impacting 3D CAD outputs. Key Responsibilities: Lead full project lifecycle activities under NEC4 contract frameworks. Build and manage detailed project schedules. Prepare, track,...
IR35 Status:
Unknown Status

CV-Library Coventry, UK Contractor
CL
Feb 18, 2026  
Vehicle Dynamics Integration Engineer
Position Title: Vehicle Dynamics Integration Engineer Duration: 7 months Location: Gaydon PAYE ONLY Role & Responsibilities: Join the vehicle dynamics team, to deliver the ride, steering and handling of future world class vehicles.The role is focused on supporting the tuning and integration of all aspects of dynamics attribute delivery from concept to production. You will gain experience across multiple vehicle dynamics disciplines while supporting the Senior engineer in delivery, but also be expected to manage and deliver technical projects. Support the definition of all vehicle dynamics attribute targets. Facilitate testing, tuning and parts integration plans. Ensure Vehicle Dynamics requirements are cascaded and transacted in system and component teams. Demonstrates vehicle performance status vs target to stakeholders and customers Experience Required: Significant understanding of vehicle dynamics fundamentals Strong organisation and project management skills....
IR35 Status:
Unknown Status

CV-Library Warwick, Warwickshire Contractor
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