https://jobs.co.uk/jobs-results?Keyword=Principal%20Mechanical%20Design%20Engineer&RadiusMiles=10 RSS feed for Principal Mechanical Design Engineer Jobs. en-gb Fri, 16 Oct 2026 16:36:31 GMT https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-building-services-gr-associates--b8a8ff09-9f40-466f-addc-ef823fa66471 https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-building-services-gr-associates--b8a8ff09-9f40-466f-addc-ef823fa66471 Fri, 16 Oct 2026 11:54:17 GMT Location: City | Salary: 50000.00-50000.00 Annual | Type: Permanent | Senior / Principal Mechanical Design Engineer required for leading West Midlands Consultancy Operating for almost 20 years, my client has been providing high quality Mechanical, Electrical and Public Health Design services for the built environment. Based from their offices in the West Midlands, they are involved in the following sectors: Commercial Education Healthcare Leisure Listed Buildings Residential Retail Transport Due to an increase in demand for their services they are looking to recruit a Senior Mechanical Design Engineer to replace a long serving engineer who is leaving the industry. You will be a key part of the delivery team and will be required to manage your own technical input, as well as that of others, and to demonstrate your understanding of the role that your work plays in the delivery of the projects as a whole. You will need an understanding of the financial and commercial considerations that affect project delivery, and be able to provide accurate and relevant reports on progress of the work against time and budgetary targets, together with being responsible for invoicing respective projects with the accounts department. You must be: A competent des... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-mep-building-services-michael-taylor-search-selection--b7aa797d-b82c-4398-bbba-45028b84e6b6 https://jobs.co.uk/job/principal-mechanical-design-engineer-mep-building-services-michael-taylor-search-selection--b7aa797d-b82c-4398-bbba-45028b84e6b6 Fri, 16 Oct 2026 11:53:35 GMT Location: London | Salary: 65000.00-65000.00 Annual | Type: Permanent | Client: My client is a growing building services consultancy with a team of around 20 people, delivering a good mix of commercial and residential projects. Their workload is split roughly 50/50 between client-side and contractor-led projects, giving engineers the chance to work across a varied portfolio and gain well-rounded experience. Despite their growth, they''ve kept a close-knit, supportive culture where everyone is approachable and there''s plenty of opportunity to learn from experienced engineers and directors. They have a strong leadership team in place, regular monthly socials, and a genuine focus on helping people develop their careers. With the business continuing to grow, they''re now looking to bring a Principal Mechanical Design Engineer into their London office. Role: Principal Mechanical Design Engineer - £65,000 - £75,000 + Benefits You''ll be involved in the design and delivery of Mechanical building services projects from initial concept through to construction. Working alongside experienced engineers, you''ll gain exposure to a broad range of commercial and residential schemes while developing your technical knowledge and taking on increasing responsibility as... Permanent https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-building-services-gr-associates--160780c3-c958-41f8-8a3d-587809232cdb https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-building-services-gr-associates--160780c3-c958-41f8-8a3d-587809232cdb Thu, 15 Oct 2026 23:00:00 GMT Location: Birmingham | Salary: £50000 - £60000/annum plus car / car allowancer | Type: Permanent | Senior / Principal Mechanical Design Engineer required for leading West Midlands Consultancy Operating for almost 20 years, my client has been providing high quality Mechanical, Electrical and Public Health Design services for the built environment. Based from their offices in the West Midlands, they are involved in the following sectors: Commercial Education Healthcare Leisure Listed Buildings Residential Retail Transport Due to an increase in demand for their services they are looking to recruit a Senior Mechanical Design Engineer to replace a long serving engineer who is leaving the industry. You will be a key part of the delivery team and will be required to manage your own technical input, as well as that of others, and to demonstrate your understanding of the role that your work plays in the delivery of the projects as a whole. You will need an understanding of the financial and commercial considerations that affect project delivery, and be able to provide accurate and relevant reports on progress of the work against time and budgetary targets, together with being responsible for invoicing respective projects with the accounts department. You ... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-mep-building-services-michael-taylor-search-amp-selection--1a46d4d7-75f1-4947-bd81-3d4a0b65ccd6 https://jobs.co.uk/job/principal-mechanical-design-engineer-mep-building-services-michael-taylor-search-amp-selection--1a46d4d7-75f1-4947-bd81-3d4a0b65ccd6 Wed, 14 Oct 2026 23:00:00 GMT Location: London | Salary: £65000 - £75000/annum 5% Project Value bonus for new work | Type: Permanent | Client: My client is a growing building services consultancy with a team of around 20 people, delivering a good mix of commercial and residential projects. Their workload is split roughly 50/50 between client-side and contractor-led projects, giving engineers the chance to work across a varied portfolio and gain well-rounded experience. Despite their growth, they've kept a close-knit, supportive culture where everyone is approachable and there's plenty of opportunity to learn from experienced engineers and directors. They have a strong leadership team in place, regular monthly socials, and a genuine focus on helping people develop their careers. With the business continuing to grow, they're now looking to bring a Principal Mechanical Design Engineer into their London office. Role: Principal Mechanical Design Engineer - £65,000 - £75,000 + Benefits You'll be involved in the design and delivery of Mechanical building services projects from initial concept through to construction. Working alongside experienced engineers, you'll gain exposure to a broad range of commercial and residential schemes while developing your technical knowledge and taking on increasing responsibility ... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-12-recruitment-ltd--43bb1a09-fd76-4f10-83c7-d306d70f5e62 https://jobs.co.uk/job/principal-mechanical-design-engineer-12-recruitment-ltd--43bb1a09-fd76-4f10-83c7-d306d70f5e62 Wed, 14 Oct 2026 11:53:29 GMT Location: City Of Westminster | Salary: 80000.00-80000.00 Annual | Type: Permanent | Principal Mechanical MEP Design Engineer Location: London Salary: 85,000 Progression: Associate / Director-level opportunities Lead mechanical design on challenging, bespoke projects within a growing London consultancy, with the opportunity to develop a team, influence project delivery and progress into senior leadership. We are working with a London-based building services consultancy looking to appoint a Principal Mechanical Design Engineer. This is an opportunity for an experienced engineer to take technical ownership of complex projects, support junior team members and play a key role in the continued development of the business. The Role Lead mechanical building services design across a range of complex, one-off projects. Take responsibility for projects from concept through to detailed design and delivery. Provide technical leadership and oversee design quality. Manage, mentor and develop engineers within the team. Coordinate mechanical designs with electrical, structural and architectural disciplines. Attend client meetings and develop strong working relationships. Support project delivery, technical reviews and design coordination. Contribute to the developm... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-12-recruitment-ltd--989e41ec-6d67-4c1c-96d0-e5d7bf16171d https://jobs.co.uk/job/principal-mechanical-design-engineer-12-recruitment-ltd--989e41ec-6d67-4c1c-96d0-e5d7bf16171d Tue, 13 Oct 2026 23:00:00 GMT Location: City of Westminster | Salary: £80000 - £90000/annum | Type: Permanent | Principal Mechanical MEP Design Engineer Location: -London Salary: 85,000 Progression: -Associate / Director-level opportunities Lead mechanical design on challenging, bespoke projects within a growing London consultancy, with the opportunity to develop a team, influence project delivery and progress into senior leadership. We are working with a London-based building services consultancy looking to appoint a Principal Mechanical Design Engineer. This is an opportunity for an experienced engineer to take technical ownership of complex projects, support junior team members and play a key role in the continued development of the business. The Role Lead mechanical building services design across a range of complex, one-off projects. Take responsibility for projects from concept through to detailed design and delivery. Provide technical leadership and oversee design quality. Manage, mentor and develop engineers within the team. Coordinate mechanical designs with electrical, structural and architectural disciplines. Attend client meetings and develop strong working relationships. Support project delivery, technical reviews and design coor... Permanent https://jobs.co.uk/job/seniorprincipal-mechanical-design-engineer-tozer-associates--2a69b284-71a7-4e9f-9515-eedcf94ba1bc https://jobs.co.uk/job/seniorprincipal-mechanical-design-engineer-tozer-associates--2a69b284-71a7-4e9f-9515-eedcf94ba1bc Fri, 09 Oct 2026 23:00:00 GMT Location: Manchester | Salary: £65,000 | Type: Permanent | Lead complex mechanical design projects in critical sectors like healthcare and education while taking control of your time with hybrid working and top-tier benefits. With three days in the office and two from home, you can focus on delivering advanced HVAC solutions for challenging environments like hospitals and laboratories. These are the kind of projects that push your expertise and keep you at... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-yolk-recruitment-limited--bee48260-72f0-4319-805b-d69430ea9724 https://jobs.co.uk/job/principal-mechanical-design-engineer-yolk-recruitment-limited--bee48260-72f0-4319-805b-d69430ea9724 Thu, 08 Oct 2026 23:00:00 GMT Location: Stevenage | Salary: £45 - £50 per hour | Type: Contract | MERITUS are recruiting for a Principal Mechanical Design Engineer to join our client within the defence sector on a 12-month contract from their site in Stevenage. This role requires candidates to hold or be eligible for SC clearance and offers the opportunity to work on complex, cutting-edge engineering programmes within a highly collaborative environment. PRINCIPAL MECHANICAL DESIGN ENGINEER - £5... Contract https://jobs.co.uk/job/principal-mechanical-design-engineer-arm--65cec134-78f1-4c4a-8b54-90db9dc43819 https://jobs.co.uk/job/principal-mechanical-design-engineer-arm--65cec134-78f1-4c4a-8b54-90db9dc43819 Thu, 08 Oct 2026 11:56:43 GMT Location: Stevenage | Salary: 50.00-50.00 Hourly | Type: Contract | Principal Mechanical Design Engineer12 month contractBased in StevenageOffering 50ph Inside IR35 Do you have experience using CREO?Do you have experience carrying out mechanical design and proving activities?Do you want to work with an industry-leading company? If your answer to these is yes, then this could be the role for you! As the Principal Mechanical Design Engineer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry. You will be involved in:Carry out Mechanical Design and proving activities as part of a wider team for prime and variant products, of both piece parts and assembliesSupport/liaise with manufacturing, resolving manufacturing problems and defectsSupport the functional and environmental testing and trialsLiaise with suppliers/purchasing to resolve any technical queries that may arisePlanning and reporting on own day-to-day activities to meet project milestonesGain clarification of and help to generate requirements Your skillset may include:Experien... Contract https://jobs.co.uk/job/principal-mechanical-design-engineer-building-services-mep-technical-talent--114db2b4-a398-4c2f-b9ea-72667fc49e57 https://jobs.co.uk/job/principal-mechanical-design-engineer-building-services-mep-technical-talent--114db2b4-a398-4c2f-b9ea-72667fc49e57 Wed, 07 Oct 2026 11:53:02 GMT Location: Rhyl | Salary: 65000.00-65000.00 Annual | Type: Permanent | We are recruiting an experienced Principal Mechanical Design Engineer to join an established MandE contractor in North Wales. This is an excellent opportunity for a senior-level Mechanical Design Engineer who wants to remain technically hands-on while taking the next step in their career towards design management. The successful candidate will take a lead role within a small building services design team, providing technical guidance and support to other engineers while remaining actively involved in the delivery of mechanical designs across a range of projects. The Role This is a hands-on technical position combined with responsibility for leading and coordinating a small design team. Responsibilities will include: Producing detailed mechanical building services designs Mechanical HVAC and public health services design Producing and developing designs using Revit and AutoCAD Carrying out mechanical calculations and equipment selections Producing technical drawings, specifications and design documentation Reviewing designs and technical information produced by other engineers Coordinating mechanical designs with electrical, architectural and structural disciplines T... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-building-services-parkinson-gray-associates--96ee2f8d-ff3f-48ee-9388-ac93fe1c3d12 https://jobs.co.uk/job/principal-mechanical-design-engineer-building-services-parkinson-gray-associates--96ee2f8d-ff3f-48ee-9388-ac93fe1c3d12 Wed, 07 Oct 2026 11:53:00 GMT Location: Yorkshire | Salary: 70000.00-70000.00 Annual | Type: Permanent | Our client is one of the leading independent MEP Design and build Contractors in Leeds. With a strong reputation for delivering high-quality mechanical and electrical engineering solutions across the leisure, residential and commercial sectors in particular, the business enjoys an interesting mix of customers including end users, main contractors and property developers. As the demand of preconstruction design services continues to grow, including a greater dependency on energy and revit modelling, the business is keen to secure the services of a talented and commercially aware Principal Mechanical Building Services Design Engineer to lead HVAC design projects and manage a small team. The successful candidate will combine strong technical expertise with commercial awareness and the ability to lead projects, develop client relationships and mentor engineers within the team. This is an excellent opportunity for an experienced mechanical building services engineer who is looking to take a leading role within an ambitious environment and have a genuine influence on its future growth. Key Responsibilities Lead the mechanical building services design of projects from concept through to ... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-arm--0d3104ce-7d01-4c5e-acba-d8f2bb4fa0a4 https://jobs.co.uk/job/principal-mechanical-design-engineer-arm--0d3104ce-7d01-4c5e-acba-d8f2bb4fa0a4 Tue, 06 Oct 2026 23:00:00 GMT Location: Stevenage | Salary: £50/hour | Type: Contract | Principal Mechanical Design Engineer 12 month contract Based in Stevenage Offering -50ph Inside IR35 Do you have experience using CREO? Do you have experience carrying out mechanical design and proving activities? Do you want to work with an industry-leading company? If your answer to these is yes, then this could be the role for you! As the Principal Mechanical Design Engineer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry. You will be involved in: Carry out Mechanical Design and proving activities as part of a wider team for prime and variant products, of both piece parts and assemblies Support/liaise with manufacturing, resolving manufacturing problems & defects Support the functional & environmental testing and trials Liaise with suppliers/purchasing to resolve any technical queries that may arise Planning and reporting on own day-to-day activities to meet project milestones Gain clarification of and help to generate re... Contract https://jobs.co.uk/job/principal-mechanical-design-engineer-building-services-mep-technical-talent--99569d47-f130-4bc1-afdd-e57630d370f8 https://jobs.co.uk/job/principal-mechanical-design-engineer-building-services-mep-technical-talent--99569d47-f130-4bc1-afdd-e57630d370f8 Mon, 05 Oct 2026 23:00:00 GMT Location: Rhyl | Salary: £65000/annum Negotiable - Plus Benefits | Type: Permanent | We are recruiting an experienced Principal Mechanical Design Engineer to join an established M&E contractor in North Wales. This is an excellent opportunity for a senior-level Mechanical Design Engineer who wants to remain technically hands-on while taking the next step in their career towards design management. The successful candidate will take a lead role within a small building services design team, providing technical guidance and support to other engineers while remaining actively involved in the delivery of mechanical designs across a range of projects. The Role This is a hands-on technical position combined with responsibility for leading and coordinating a small design team. Responsibilities will include: Producing detailed mechanical building services designs Mechanical HVAC and public health services design Producing and developing designs using Revit and AutoCAD Carrying out mechanical calculations and equipment selections Producing technical drawings, specifications and design documentation Reviewing designs and technical information produced by other engineers Coordinating mechanical designs with electrical, architectural ... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-building-services-parkinson-gray-associates--96b7a293-3f6c-4807-a78f-bd077fd2cbd5 https://jobs.co.uk/job/principal-mechanical-design-engineer-building-services-parkinson-gray-associates--96b7a293-3f6c-4807-a78f-bd077fd2cbd5 Mon, 05 Oct 2026 23:00:00 GMT Location: Gildersome | Salary: £70000 - £80000/annum | Type: Permanent | Our client is one of the leading independent MEP Design & build Contractors in Leeds. With a strong reputation for delivering high-quality mechanical and electrical engineering solutions across the leisure, residential and commercial sectors in particular, the business enjoys an interesting mix of customers including end users, main contractors and property developers. As the demand of preconstruction design services continues to grow, including a greater dependency on energy and revit modelling, the business is keen to secure the services of a talented and commercially aware Principal Mechanical Building Services Design Engineer to lead HVAC design projects and manage a small team. The successful candidate will combine strong technical expertise with commercial awareness and the ability to lead projects, develop client relationships and mentor engineers within the team. This is an excellent opportunity for an experienced mechanical building services engineer who is looking to take a leading role within an ambitious environment and have a genuine influence on its future growth. Key Responsibilities Lead the mechanical building services design of projects from concept thr... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-search-consultancy-ltd--d5aa0ee2-3a2c-4208-a97f-eb59746fcd15 https://jobs.co.uk/job/principal-mechanical-design-engineer-search-consultancy-ltd--d5aa0ee2-3a2c-4208-a97f-eb59746fcd15 Wed, 30 Sep 2026 23:00:00 GMT Location: London | Salary: £60000 - £70000/annum | Type: Permanent | Role Purpose We are seeking an experienced and ambitious Principal Design Engineer to join a growing Building Services consultancy. This is an excellent opportunity for a senior-level engineer looking to lead the design and delivery of complex projects across commercial, residential, healthcare, education, industrial, and mixed-use developments. Responsibilities Lead the design and delivery of building services projects from concept through to completion. Manage multidisciplinary engineering teams and coordinate with architects, contractors, and external stakeholders. Produce and review detailed engineering calculations, specifications, reports, and technical drawings. Provide technical leadership across HVAC, public health, electrical, or mechanical building services disciplines. Ensure compliance with current regulations, British Standards, and industry best practices. Attend client meetings and act as a technical lead throughout project lifecycles. Support business development activities, including fee proposals, presentations, and bid submissions. Manage project resources, budgets, and programme delivery. Mentor and develop junior and intermediate engineers. ... Permanent https://jobs.co.uk/job/principal-mechanical-design-engineer-certain-advantage--9707e954-61d5-45c9-bce8-8a7209177d19 https://jobs.co.uk/job/principal-mechanical-design-engineer-certain-advantage--9707e954-61d5-45c9-bce8-8a7209177d19 Thu, 24 Sep 2026 23:00:00 GMT Location: Huddersfield | Salary: £65,000 | Type: Permanent | Principal Mechanical Design Engineer Certain Advantage is hiring for a Principal Mechanical Design Engineer based in the Huddersfield area. This role is on a permanent basis and is hybrid-based. The Company Were working with an engineering company specialising in solving complex engineering challenges across industriesfrom Power Generation, Rail and more. Does this sound like your next career move? If you... Permanent https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-rgb--b3313e5d-b546-498b-b2a0-6a3f0409652a https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-rgb--b3313e5d-b546-498b-b2a0-6a3f0409652a Thu, 24 Sep 2026 11:50:02 GMT Location: Southampton | Salary: £50000 - £70000 per annum | Type: Permanent | Senior / Principal Mechanical Design Engineer (Building Services) Location: Southampton Area Salary: £50,000 - £70,000 The Company An established sustainability and building services design consultancy based in the Southampton area, is looking to appoint an experienced Senior / Principal Mechanical Design Engineer to support its continued growth. They provide mechanical building services engineering, energy management and sustainability consultancy services across a range of sectors and project types. Working with end users, construction professionals and installing contractors, the consultancy delivers engineering solutions for new-build construction, building refurbishment, plant replacement and energy efficiency projects. Their approach combines technical building services expertise with a focus on energy efficiency, system optimisation and effective building operation. The business supports clients with solutions designed to reduce energy consumption, carbon emissions and energy costs. Alongside mechanical building services design, its services include energy audits, net zero carbon strategies, carbon reporting, utility management, condition surveys and technical ... Permanent https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-rgb-recruitment--8809b794-6653-4016-a3da-85bfe6d47c81 https://jobs.co.uk/job/senior-principal-mechanical-design-engineer-rgb-recruitment--8809b794-6653-4016-a3da-85bfe6d47c81 Wed, 23 Sep 2026 14:06:06 GMT Location: Southampton | Salary: £50000 - £70000 per annum | Type: Full time | Senior / Principal Mechanical Design Engineer (Building Services) Location: Southampton Area Salary: £50,000 - £70,000 The Company An established sustainability and building services design consultancy based in the Southampton area, is looking to appoint an experienced Senior / Principal Mechanical Design Engineer to support its continued growth. They provide mechanical building services engineering, energy management and sustainability consultancy services across a range of sectors and project types. Working with end users, construction professionals and installing contractors, the consultancy delivers engineering solutions for new-build construction, building refurbishment, plant replacement and energy efficiency projects. Their approach combines technical building services expertise with a focus on energy efficiency, system optimisation and effective building operation. The business supports clients with solutions designed to reduce energy consumption, carbon emissions and energy costs. Alongside mechanical building services design, its services include energy audits, net zero carbon strategies, carbon reporting, utility management, condition surveys and tec... Full time