Mechanical Design Engineer
CV-LibraryLondoncontractPosted: 17 August 2026
Apply NowMechanical Design Engineer
Contract: 6 Months | Outside IR35
Working: Monday–Friday | 3 Days Office-Based
Sector: Rail, Utilities & Airports
Employer: Principal Contractor
The Role:
We are looking for an experienced Mechanical Design Engineer to join a Principal Contractor delivering major infrastructure projects across the Rail, Utilities and Airport sectors.
The role will focus on delivering detailed mechanical building services designs, with a strong emphasis on HVAC systems. You will work as part of a multidisciplinary design team, supporting projects from detailed design through to construction.
Key Responsibilities:
* Deliver detailed mechanical and HVAC designs.
* Produce drawings, layouts, specifications and technical documentation.
* Carry out design calculations and equipment sizing.
* Coordinate designs with multidisciplinary teams.
* Ensure designs meet relevant standards and client requirements.
* Resolve technical queries and support design reviews.
* Work closely with project and construction teams.
* Deliver design packages to programme and quality requirements.
Key Requirements:
* Experience as a Mechanical Design Engineer within building services.
* Strong HVAC design experience.
* Experience working on major infrastructure or construction projects.
* Experience within Rail, Utilities, Airports or similar sectors desirable.
* Principal Contractor experience advantageous.
* Good knowledge of UK standards and building services regulations.
* Experience with AutoCAD and/or Revit MEP desirable.
* Relevant engineering qualification preferred.
Contract Details:
* 6-month contract
* Outside IR35
* Monday to Friday
* 3 days per week in the office
* Major infrastructure projects
* Principal Contractor environment
This is a great opportunity for a Mechanical Design Engineer with strong HVAC/building services experience to work on major UK infrastructure projects
Contract: 6 Months | Outside IR35
Working: Monday–Friday | 3 Days Office-Based
Sector: Rail, Utilities & Airports
Employer: Principal Contractor
The Role:
We are looking for an experienced Mechanical Design Engineer to join a Principal Contractor delivering major infrastructure projects across the Rail, Utilities and Airport sectors.
The role will focus on delivering detailed mechanical building services designs, with a strong emphasis on HVAC systems. You will work as part of a multidisciplinary design team, supporting projects from detailed design through to construction.
Key Responsibilities:
* Deliver detailed mechanical and HVAC designs.
* Produce drawings, layouts, specifications and technical documentation.
* Carry out design calculations and equipment sizing.
* Coordinate designs with multidisciplinary teams.
* Ensure designs meet relevant standards and client requirements.
* Resolve technical queries and support design reviews.
* Work closely with project and construction teams.
* Deliver design packages to programme and quality requirements.
Key Requirements:
* Experience as a Mechanical Design Engineer within building services.
* Strong HVAC design experience.
* Experience working on major infrastructure or construction projects.
* Experience within Rail, Utilities, Airports or similar sectors desirable.
* Principal Contractor experience advantageous.
* Good knowledge of UK standards and building services regulations.
* Experience with AutoCAD and/or Revit MEP desirable.
* Relevant engineering qualification preferred.
Contract Details:
* 6-month contract
* Outside IR35
* Monday to Friday
* 3 days per week in the office
* Major infrastructure projects
* Principal Contractor environment
This is a great opportunity for a Mechanical Design Engineer with strong HVAC/building services experience to work on major UK infrastructure projects