By Shruti Verman | CertIOSH

If you work in UK construction, you’ve almost certainly come across both SMSTS and SSSTS. They’re the two most common CITB qualifications on site — and yet they’re regularly confused, mixed up, or booked for the wrong person. Here’s a clear breakdown of what each qualification actually covers, who it’s for, and how to get the right one on your team.

What is SMSTS?

SMSTS stands for Site Management Safety Training Scheme. It’s a five-day CITB qualification aimed at site managers — those responsible for the overall management of a construction site or a significant section of one. The course covers health and safety legislation, CDM 2015 duties, welfare requirements, risk management and the responsibilities that come with managing a team on site.

The certificate is valid for five years, after which a two-day refresher is required to keep it current. Most major principal contractors now require SMSTS as a condition of site access for managers, so if you’re tendering for work with larger contractors, your site managers almost certainly need it.

What is SSSTS?

SSSTS — Site Supervisor Safety Training Scheme — is the two-day equivalent for supervisors. Where SMSTS is about managing a site, SSSTS is about supervising a team within it. It covers similar legal frameworks but at the level of day-to-day supervision rather than overall site management.

Like SMSTS, the certificate lasts five years and requires a refresher to renew. It’s widely recognised across the UK construction industry and is typically required for foremen, leading hands and trade supervisors on larger projects.

The key difference: role, not seniority

The most common mistake when booking these courses is treating them as a hierarchy — SMSTS for senior people, SSSTS for junior ones. That’s not how it works. The distinction is about role and responsibility, not experience or pay grade.

A highly experienced carpenter who supervises a small team on site needs SSSTS — not SMSTS. A relatively new site manager who has overall responsibility for a project needs SMSTS, regardless of how long they’ve been in the industry. Booking the wrong qualification wastes money, creates gaps in legal compliance, and may not satisfy principal contractor requirements when checked.

Who should do SMSTS?

• Site managers with overall responsibility for a project or section
• Project managers regularly present on site
• Contracts managers who take an active management role on site
• Anyone named as the person in control under CDM 2015

Who should do SSSTS?

• Working foremen and leading hands
• Trade supervisors overseeing a gang or small team
• Sub-agent supervisors on civil engineering projects
• Anyone directing the day-to-day work of others without overall site management responsibility

Can someone do SMSTS without doing SSSTS first?

Yes. There’s no requirement to hold SSSTS before taking SMSTS. They’re separate qualifications for separate roles — not steps on the same ladder. If someone moves directly into a site manager role, they should go straight to SMSTS.

That said, if someone is currently in a supervisory role and is likely to step up to site management, it’s worth thinking about timing. Doing SSSTS now and SMSTS in a year or two is a reasonable progression — but holding SSSTS is not a prerequisite for SMSTS.

What about refreshers?

Both qualifications expire after five years. The SMSTS refresher is two days; the SSSTS refresher is one day. Many employers lose track of expiry dates across their teams — particularly where staff have been with the business for several years and certificates were obtained before a centralised training record was in place.

It’s worth auditing your team’s certificates now. An expired SMSTS is as useless as not having one at all when a principal contractor checks competence records — and it can hold up a project start or trigger a prohibition notice on site.

Getting the right training for your team

Whether you need SMSTS, SSSTS, refreshers, or a mix across a whole team, the starting point is always the same: match the qualification to the role, not the person’s seniority. If you’re unsure which applies to specific members of your team, or you want to arrange group training at your premises, we’re happy to talk it through.