A site manager runs a construction site: the programme, the subcontractors, the materials, the safety regime and the relationship with the client and consultants. Where a foreman runs the crew, a site manager runs the site as a whole and answers for what it delivers.
This guide sets out site manager duties and responsibilities, the daily routine, and how the role differs by project type. It sits in the Trades Technical duties and responsibilities cluster, part of the wider job duties guide.
What Does a Site Manager Do?
A site manager turns a construction programme into daily activity and keeps it on track. That means sequencing trades so they are not standing on each other, having materials on site before they are needed, resolving the design queries that always arise, and reporting progress honestly enough that problems can be fixed rather than discovered late.
Health and safety accountability is a defining feature. Construction Regulations in South Africa require specific written appointments, and a site manager typically holds or oversees several. Those appointments carry legal duties that exist independently of the employment contract.
Key Site Manager Duties and Responsibilities
- Planning and managing the construction programme and daily site activity.
- Coordinating subcontractors, trades and site staff to avoid conflicts and delays.
- Managing material ordering, delivery scheduling and site storage.
- Overseeing quality of workmanship and arranging inspections and sign-offs.
- Implementing and monitoring the site health and safety plan.
- Managing site inductions, permits and access control.
- Chairing site meetings and liaising with the client, consultants and the principal agent.
- Recording progress, delays, instructions and variations in the site diary.
- Supporting progress claims, valuations and variation pricing.
- Controlling site costs, plant hire and labour against budget.
- Managing snagging, handover and close-out documentation.
- Investigating incidents and enforcing corrective action on site.
Daily Tasks of a Site Manager
- Start of day: walk the site, check attendance across subcontractors, confirm the day’s activities.
- Morning: resolve access and sequencing conflicts, issue instructions, check deliveries arriving.
- Midday: quality inspections, consultant queries, safety walkabout and permit checks.
- Afternoon: programme review, material ordering, cost tracking and correspondence.
- End of day: complete the site diary, confirm tomorrow’s requirements and report progress.
Site Manager Skills and Competencies
- Programme management: sequencing trades and seeing a delay before it arrives.
- Technical knowledge: understanding the construction well enough to judge quality and method.
- Contract awareness: knowing what constitutes an instruction, a variation and a claim.
- Safety leadership: setting the standard visibly rather than delegating it entirely.
- Record keeping: a site diary that supports the contractor’s position months later.
- Firmness with subcontractors: holding them to programme and standard without losing cooperation.
Site Manager Duties by Workplace or Industry
Building and Residential Construction
Duties centre on trade sequencing through structure, services and finishes, snagging and handover, and managing neighbours and access on constrained urban sites.
Civil and Infrastructure
Earthworks, roads and services dominate, with duties around survey control, plant management, weather-dependent programming and public safety around live traffic.
Industrial and Commercial Fit-Out
Work often happens in occupied buildings, adding duties around out-of-hours scheduling, noise and dust control, and coordination with the client’s operations.
Public Sector Projects
Duties add compliance with procurement conditions, local labour and community requirements, and formal reporting to the client and professional team at set intervals.
Site Manager Duties for a CV
Give project value, site size, the trades you coordinated and your programme and safety record. Use the duties for a CV guide for the method.
- Managed a R120 million commercial building project with up to 180 workers across nine subcontractors.
- Delivered practical completion within the contract programme and inside the cost plan.
- Maintained the construction health and safety file and passed all client audits with no major findings.
- Chaired weekly site meetings with the professional team and maintained the site diary throughout.
Related Job Roles and Responsibilities
These guides cover the roles and next steps most closely related to this one.
- Foreman duties and responsibilities
- Project Manager duties and responsibilities
- Safety Officer duties and responsibilities
- Supervisor duties and responsibilities
- Job description duties and responsibilities
Frequently Asked Questions About Site Manager Duties
What are the duties of a site manager?
Managing the construction programme and daily activity, coordinating subcontractors and trades, managing materials and deliveries, overseeing quality and inspections, implementing the health and safety plan, running inductions and permits, chairing site meetings, maintaining the site diary, supporting progress claims and managing handover.
What is the difference between a site manager and a project manager?
A site manager is based on site and responsible for building the works. A project manager takes a wider view across design, contract, cost and client relationship, and may run several projects. On smaller contracts one person does both.
Why does the site diary matter?
Because it is the contemporaneous record of what happened: who was on site, what was delivered, what instructions were given and what delayed the work. When a delay claim or dispute arises months later, the diary is usually the strongest evidence available.
What qualifications does a site manager need?
A construction-related qualification such as a national diploma in building, or a trade background with substantial site experience. Health and safety training is expected, and construction regulations impose competence requirements for certain appointments.
What appointments does a site manager typically hold?
Construction Regulations require various written appointments on a site, covering areas such as construction supervision, health and safety, and specific high-risk activities. A site manager often holds one or more personally and oversees others. Each appointment should be signed, kept on site in the health and safety file, and understood by the person named in it, because the duties attach to the individual rather than to the job title.
Duties vary by contractor, contract and project type. Construction Regulations, the conditions of contract and any written safety appointment take precedence over this general guide.
Last reviewed: 2 September 2026