Mechanical Site Supervisor

Kier Group; Cherwell District; On-site; GBP 42,000 - 56,000; Full time

Job summary

Kier Group in Thames Valley North is seeking a Mechanical Site Supervisor to support the WAAP team on the wastewater asset assurance programme. This is a site-based, full-time role working 45 hours per week with some flexibility on hours.

You will supervise mechanical works, ensure safety, and verify ITPs in Kier's data environment, collaborating with the Site Manager and contractors. Experience in water industry and CSCS required; NVQ/BTEC Level 3 preferred; SSSTS/SMSTS advantageous.

Qualifications

• Demonstrable experience in the Water Industry with strong technical knowledge.
• NVQ/BTEC Level 3 in Mechanical installations with a CSCS Card.
• SSSTS / SMSTS qualifications and Confined Spaces.
• Full driving licence required.
• Good working knowledge of sewage and water treatment processes and typical M&E plant and equipment.

Responsibilities

• Supporting the Site Manager in maintaining a safe working environment for all employees, supply chain partners and visitors
• Supervising work to ensure it is carried out in accordance with Method Statements and Work Instructions
• Reviewing and signing off project ITPs, ensuring they are managed through Kier's common data environment
• Overseeing mechanical contractor testing and ensuring works are in line with Thames Water asset standards
• Recording all non-conformance and improvement opportunities and agreeing actions with those in charge of the works

Skills

Full driving licence

Water Industry experience

Mechanical installations knowledge

SSSTS / SMSTS

Confined Spaces

M&E plant knowledge

Education

NVQ/BTEC Level 3 in Mechanical installations

CSCS Card

Job description

We're looking for a Mechanical Site Supervisor to join our Wastewater Asset Assurance Programme (WAAP) team based in Thames Valley North.

Location: Thames Valley North - Site BasedHours: 45 hours per week - some flexibility on hours available if desired, just let us know when you speak to us.

We are unable to offer certificates of sponsorship to any candidates in this role.

Mechanical Site Supervisor

Company: Kier Group

Salary: Not specified

Hours: Full-time

Location: SL9 0BG

Job type: Permanent

Posting date: 5 Nov 2026

Closing date: 19 Nov 2026

What will you be responsible for?

• Supporting the Site Manager in maintaining a safe working environment for all employees, supply chain partners and visitors
• Supervising work to ensure it is carried out in accordance with Method Statements and Work Instructions
• Reviewing and signing off project ITPs, ensuring they are managed through Kier's common data environment
• Overseeing mechanical contractor testing and ensuring works are in line with Thames Water asset standards
• Recording all non-conformance and improvement opportunities and agreeing actions with those in charge of the works

What are we looking for?

• You hold a Full driving licence
• You have demonstrable experience in the Water Industry with strong technical knowledge
• You possess an NVQ/BTEC Level 3 in Mechanical installations along with a relevant CSCS Card
• You have SSSTS / SMSTS and Confined Spaces qualifications
• You have a good working knowledge of sewage and water treatment processes, systems, and typical M&E plant and equipment

We're all about finding potential here at Kier, and transferrable skills are always welcome! So, even if you don't tick every box, please apply and we can have a chat.

Rewards and benefits

We're proud to be able to offer our brilliant people a wide variety of benefits that you can tailor to your needs. You can see more information of benefits here.

Diversity and inclusion

Making Kier a diverse and inclusive place to work is a huge priority for us. We're proud of the steps we've taken so far, but we know we must always do more. Our employees are key in shaping Kier's diversity and inclusion initiatives and our people have made a huge impact on how we work, by using their experiences to shape our policies. You can see our D&I action plan here. As a Disability Confident employer, we will ensure that a fair and proportionate number of disabled applicants that meet the minimum criteria for this role will be offered an interview.

We look forward to seeing your application to #joinkier #LI-CH1.

Proud member of the Disability Confident employer scheme

About Disability Confident

Disability Confident is a government scheme. It encourages employers to recruit and retain disabled people and those with long term health conditions.