The SSSTS — Site Supervisors Safety Training Scheme — is a two-day health and safety training qualification for supervisors working in the construction industry. It's run by the Construction Industry Training Board (CITB) and is one of the most widely recognised supervisor-level safety credentials in the UK.
If you're a site supervisor, foreman, chargehand, or anyone responsible for managing workers on a construction site, the SSSTS is the standard benchmark qualification for your level. It demonstrates that you understand your legal responsibilities, can manage on-site risks, and know how to implement safety procedures — not just follow them.
The SSSTS sits one level above the CSCS Health, Safety and Environment test that operatives take, and one level below the Site Management Safety Training Scheme (SMSTS) taken by site managers. It's the middle tier of CITB's safety training structure.
The SSSTS is typically required for anyone in a supervisory role on a UK construction site. This includes trade supervisors and chargehands, gangers and team leaders, working foremen, junior site supervisors, and those moving into supervisor positions from operative roles.
Many principal contractors and main contractors require subcontractors to ensure their supervisory staff hold the SSSTS or equivalent. It's also often specified in contracts and PQQ (pre-qualification questionnaire) requirements. Without it, you may find yourself blocked from site or unable to progress into supervisory roles.
In terms of CSCS cards: supervisors aiming for the CSCS Supervisor card (gold card) need the SSSTS certificate alongside the appropriate NVQ or SVQ. The SSSTS alone isn't sufficient for the CSCS card — you need both.
The course runs over two days (typically classroom-based, though online versions are available) and covers the key areas a construction site supervisor needs to understand and manage:
The course isn't passive — delegates are expected to participate actively, work through case studies, and demonstrate they can apply the knowledge to supervisory situations, not just recite it.
The SSSTS assessment includes a written test and, in most cases, a short presentation or practical exercise. The written test is multiple-choice and tests knowledge of the content covered during the two days. There's no independent external exam — the assessment is conducted by your training provider and results are validated by CITB.
To pass, you need to demonstrate satisfactory understanding across the core topic areas. Most delegates who attend both days and engage with the material pass without difficulty. Those who struggle are usually people who haven't engaged with the content during the course rather than those who found the subject matter genuinely difficult.
Preparation before the course — especially reviewing SSSTS training material on CDM 2015, risk assessment processes, and supervisor responsibilities — helps you arrive ready to participate rather than just absorb information for the first time.
SSSTS courses are delivered by CITB-approved training providers across the UK. You can find accredited providers through the CITB website. Many training providers offer both classroom and online-blended versions of the course.
The course fee typically ranges from £200–£350 depending on the provider and location, though some employers cover the cost as part of workforce development. It's worth checking whether your employer has an account with a training provider or whether they'll fund the training — many do, particularly for operatives moving into supervisor roles.
Online-blended versions combine self-study with a live assessment day. They offer more flexibility around scheduling but still require you to engage with the full content — you can't just skip to the test.
After passing the SSSTS, you receive a CITB SSSTS certificate. This certificate is valid for five years. When it expires, you need to complete an SSSTS Refresher course (one day) to renew your qualification — you don't have to sit the full two-day course again unless your certificate has lapsed for an extended period.
Your SSSTS certificate supports your application for a CSCS Supervisor card (gold). The site supervisor card requires evidence of a relevant qualification (NVQ/SVQ at the appropriate level) alongside the SSSTS. Check the CSCS website for the current card requirements as they're periodically updated.
The SMSTS (Site Management Safety Training Scheme) is CITB's qualification for site managers and project managers. It covers the same core safety topics as the SSSTS but in more depth and from a management rather than supervisory perspective. The SMSTS runs over five days and is significantly more intensive.
If you're a supervisor now but working toward a site manager role, you'll likely need to progress from SSSTS to SMSTS at some point. The two qualifications aren't interchangeable — an SMSTS holder can supervise, but a supervisor-level role typically doesn't require SMSTS. Know which qualification your role requires before you book.
CDM 2015 — the Construction (Design and Management) Regulations 2015 — is the most significant piece of legislation you'll deal with as a construction site supervisor. The SSSTS dedicates substantial time to it, and for good reason: CDM 2015 restructured how health and safety responsibilities are assigned on construction projects, and supervisors play a direct role in its implementation on site.
Under CDM 2015, supervisors are responsible for ensuring that the workers they manage are following site-specific health and safety rules, that risk assessments and method statements (RAMS) are understood and followed, that site inductions have been completed, and that any near-misses or incidents are reported and documented properly.
You're not expected to be a CDM coordinator — that's a different role. But you are expected to understand the principal designer's and principal contractor's responsibilities and know how your supervisory duties fit within that framework. Knowing what CDM 2015 requires of you, not just in general but in the specific situations that arise on your site, is core to the SSSTS.
Toolbox talks are short, focused safety briefings delivered to workers before a task begins or when a new risk arises on site. They're one of the most practical tools a supervisor has, and the SSSTS covers how to structure and deliver them effectively.
A good toolbox talk is specific, brief (typically 10–15 minutes), and relevant to the work happening that day or week. It's not a lecture — it's a conversation. Workers should be able to ask questions, raise concerns, and confirm they understand what's expected. Recording who attended is important: it creates a paper trail showing that workers were informed of specific risks.
Practice questions on SSSTS Toolbox Talks help you consolidate your understanding of when toolbox talks are required, what they should cover, and how they relate to your broader supervisory responsibilities under CDM 2015.
RAMS — Risk Assessments and Method Statements — are fundamental documents on any construction site. As a supervisor, you need to understand them well enough to explain them to your workers and enforce compliance. You're not typically the person who writes the RAMS (that's usually the contractor or a safety officer), but you are responsible for ensuring that the people under your supervision understand and follow them.
The SSSTS covers the hierarchy of risk controls (elimination, substitution, engineering controls, administrative controls, PPE), how to assess likelihood and severity, and the difference between generic and site-specific risk assessments. These concepts appear directly in the SSSTS written test — and more importantly, they're essential to doing the job safely.
Your SSSTS certificate lasts five years. As expiry approaches, you need to book an SSSTS Refresher course — a one-day course that updates your knowledge on any regulatory or best-practice changes since you last trained and resets the five-year clock.
The refresher is much less intensive than the original course, but it still covers significant ground. You shouldn't walk in assuming nothing has changed — CDM guidance, COSHH regulations, and working at height best practice all evolve. The refresher is designed to catch you up efficiently.
If your certificate has already lapsed, your training provider will tell you whether you need the refresher or the full two-day course again. Don't let it lapse if you can avoid it — the full course takes more time and usually costs more than the refresher. Use the safety training resources to keep your knowledge current between formal renewals.
Most people who attend the SSSTS course full and engaged pass the assessment without significant difficulty. That said, arriving with some prior knowledge makes the two days more productive and means you're consolidating understanding rather than encountering the material for the first time.
Focus your preparation on three areas: CDM 2015 (who's responsible for what, and what supervisors specifically must do), risk assessment principles (hazard identification, risk rating, control hierarchy), and site inductions (what they must cover and who needs them). These topics carry the most weight in the assessment and come up most often in real supervisory practice.
Reviewing SSSTS site inductions and CDM practice questions before your course helps you engage more meaningfully with the material when you encounter it in the classroom, rather than trying to absorb and memorise simultaneously.
The SSSTS is a practical qualification — it's designed to make you a more effective and safer supervisor, not just to give you a certificate. Take it seriously. The knowledge you build during training will serve you every day on site.