Mechanical Site Supervisor in Cardiff

Mechanical Site Supervisor – Building Services

Salary: £40,000 – £50,000 (depending on experience)

Job Type: Full-time, Permanent

Location: South Wales (with UK-wide travel as required)

About the Role

We are seeking an experienced Mechanical Site Supervisor to join a growing building services team delivering large-scale commercial new build and refurbishment projects across the UK. This is an excellent opportunity for a motivated professional to lead site operations, ensuring installations are completed to the highest standards, on time, and within programme requirements.

Key Responsibilities

• Manage all aspects of mechanical installation at site level.
• Supervise operatives and subcontractors, ensuring compliance with drawings and specifications.
• Oversee health, safety, and environmental compliance, including toolbox talks.
• Ensure quality standards using internal QA procedures and maintain accurate records.
• Report on site progress and attend client meetings.
• Assist with commissioning and handover processes in collaboration with the Project Manager.

About You

• Minimum 5 years\’ experience as a Mechanical Site Supervisor on large-scale commercial projects.
• NVQ Level 2 or 3 in Heating & Ventilation (Commercial), Building Services Installation, or Plumbing Systems.
• Strong knowledge of mechanical systems and installation methods.
• Previous experience managing subcontractors is desirable.
• Excellent organisational skills, attention to detail, and IT literacy (Microsoft Office).
• Full UK driving licence and willingness to travel (including overnight stays when required).

Working Hours

37 hours per week:

• Monday-Thursday: 8:00 AM – 4:00 PM
• Friday: 8:00 AM – 3:00 PM

(Some overtime or weekend work may be required. Lodging provided for projects away from home.)

Benefits

• Competitive salary (£40,000 – £50,000 depending on experience)
• Company pension scheme
• Travel and accommodation expenses covered for projects away from home
• Opportunities for career progression and professional development

Apply now and take the next step in your Mechanical Site Supervision career.