Lead safe, high-quality mechanical installations with JGM
JGM is seeking an experienced
Mechanical Supervisor in Perth
to coordinate site teams, subcontractors and day-to-day mechanical installation activities across building services projects.
Working closely with the Mechanical Project Manager and wider delivery team, you will help ensure works are completed safely, efficiently and in line with approved drawings, specifications, project programmes and quality standards.
This hands-on role requires strong site leadership, practical technical knowledge and a proactive approach to resolving issues.
About JGM
Founded in ****, John G Mackintosh has developed into a multidisciplinary building services contractor delivering electrical, mechanical and specialist solutions.
Our culture is shaped by four values: Integrity, Diligence, Professionalism and Collaboration.
We provide high-quality engineering solutions across multiple sectors and are committed to secure, reliable project delivery.
JGM is an equal opportunities employer and welcomes applications from all suitably qualified candidates.
The Role
As Mechanical Supervisor, you will oversee mechanical operatives, apprentices and subcontractors while coordinating labour, materials, plant and equipment.
You will monitor progress, workmanship and compliance, identify site or technical issues, and provide clear updates to the Mechanical Project Manager.
You will supervise installations including heating, ventilation, air conditioning, pipework and associated plant.
You will also support inspection, testing, commissioning, snagging and final handover.
Key Responsibilities
Site supervision and delivery
Supervise and coordinate daily mechanical installation activities.
Allocate tasks to operatives and subcontractors and monitor completion.
Ensure work follows approved drawings, specifications, programmes and procedures.
Monitor site progress and report delays, risks and resource concerns.
Coordinate labour, materials, plant, tools and equipment.
Attend site and coordination meetings and provide accurate updates.
Resolve day-to-day site issues and elevate significant matters.
Keep work areas organised and ready for planned activities.
Coordinate activities with other trades and site-management teams.
Technical supervision and quality
Oversee heating,



ventilation, air-conditioning, pipework and plant installations.
Review and interpret mechanical drawings, specifications and installation details.
Identify technical issues, drawing discrepancies and potential clashes.
Inspect ongoing and completed work for quality and compliance.
Coordinate snagging and ensure defects are resolved promptly.
Support testing, commissioning and project handover.
Maintain quality-assurance, inspection and handover records.
Health, safety and environment
Promote a positive health and safety culture across site activities.
Ensure compliance with company policies, site rules and statutory requirements.
Ensure teams understand and follow approved RAMS.
Deliver toolbox talks, safety briefings and daily activity briefings.
Monitor working practices and address unsafe conditions or behaviours.
Ensure appropriate PPE, tools, equipment and safe systems of work are used.
Report accidents, incidents, near misses and hazards.
Support site inspections, audits and corrective actions.
Maintain good housekeeping and appropriate environmental controls.
People, resources and reporting
Supervise and guide operatives, apprentices and subcontractors.
Monitor productivity, performance, workmanship and site compliance.
Support apprentices and less experienced team members.
Forecast material needs and coordinate deliveries, storage and distribution.
Ensure materials and equipment are stored correctly to reduce damage and waste.
Maintain daily progress reports, labour returns, inspection records and site documentation.
Report variations, additional works and changes to the Project Manager.
Maintain effective communication with site teams, management, suppliers and clients.
About You
Proven experience in mechanical building services installation or a similar construction environment.
Previous experience supervising operatives, subcontractors or site-installation activities.




Strong practical knowledge of mechanical systems, installation methods and construction processes.
Good technical understanding of heating, ventilation, air conditioning, pipework and associated plant.
Ability to read and interpret mechanical drawings, specifications and project documentation.
Strong understanding of site health and safety requirements and safe working practices.
Experience coordinating daily activities, labour and resources.
Experience monitoring installation quality and required standards.
Strong leadership, communication, organisation and problem-solving skills.
Ability to work independently and as part of a wider project team.
Recognised mechanical trade qualification, apprenticeship, NVQ/SVQ or equivalent relevant experience.
Appropriate CSCS or recognised industry skills card.
SSSTS or equivalent site-supervisory health and safety qualification.
Experience supervising commercial, industrial or large-scale mechanical installations.
Experience working for an M&E; or building services contractor.
Experience coordinating multiple trades and subcontractors.
Knowledge of testing, commissioning and mechanical handover.
Experience working with main or principal contractors.
Familiarity with quality-assurance procedures and site-reporting systems.
HNC or HND in Mechanical Engineering, Building Services or a related discipline.
First Aid at Work qualification.
Relevant manufacturer or specialist mechanical systems training.
Additional health and safety or supervisory training.
Health, safety and environment
Safety is a core value at JGM.
The successful candidate must perform all duties in accordance with company health, safety and environmental policies, relevant legislation, approved RAMS and project-specific requirements.
General
This job description outlines the principal responsibilities of the role but is not exhaustive.
The postholder may be required to undertake other duties consistent with the position's level of responsibility and competence.
JGM may amend this job description in line with business needs and company priorities.
Location: Edinburgh (with travel to customer sites as required)
Location: Edinburgh (with travel to customer sites as required)
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📌 Mechanical Supervisor (Tasmania)
🏢 John G. Mackintosh
📍 Tasmania