Job Title: Principal Mechanical Design Engineer
Location: Reading
Hours: 36 hours per week (Hybrid working available)
Car allowance: £5,800 per annum
First Off – What’s in it for you?
The Principal Mechanical Design Engineer will benefit from a strong package and clear progression within a technically influential environment:
- £80,000 basic salary DOE
- Annual performance-related bonus
- 26 days annual leave (rising with service) plus bank holidays
- Private medical cover and wellbeing support
- Life assurance and employee assistance programme
- Professional membership and chartership support
- Opportunity for the Principal Mechanical Design Engineer to influence engineering standards across major UK water programmes
Now – The Role
This Principal Mechanical Design Engineer role offers an opportunity to take a leading technical authority position within a specialist engineering function supporting major UK water and wastewater infrastructure programmes.
The position is focused on engineering governance, design assurance, and the application of industry standards, with a strong emphasis on WIMES compliance, technical approval, and consistency across mechanical design outputs. The Principal Mechanical Design Engineer will play a key role in shaping standards and ensuring robust engineering delivery across sludge treatment, digestion, and related process systems.
Role Responsibilities
Key responsibilities include:
- Checking, reviewing, and formally approving mechanical design deliverables
- Acting as technical authority for mechanical engineering within regulated water environments
- Ensuring compliance with WIMES standards, UK regulations, and client specifications
- Developing and maintaining industry-wide mechanical design standards and practices
- Providing engineering governance and assurance across project lifecycle stages
- Leading technical input into:
- Sludge treatment and digestion systems
- Biogas and CHP infrastructure
- Pumping stations and pipework networks
- Water and wastewater process equipment
- Supporting consistency and standardisation of engineering outputs across teams
- Mentoring and guiding engineers to improve technical quality and compliance
Experience & Qualifications
The Principal Mechanical Design Engineer should demonstrate the following:
- Degree-qualified in Mechanical Engineering (or equivalent)
- Chartered Engineer status (or working towards)
- Strong background in UK water and wastewater engineering environments
- Proven experience with WIMES standards and regulated design frameworks
- Experience in sludge digestion, biogas, CHP, or wastewater treatment systems
- Demonstrable experience in design review, checking, and approval responsibilities
- Strong understanding of engineering governance, compliance, and technical assurance
Interested?
If you are an experienced Principal Mechanical Design Engineer looking to operate as a true technical authority—driving standards, approving critical engineering outputs, and shaping delivery across major water infrastructure programmes—please apply to find out more.
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