How to Hire a Site Manager in the UK

Your site manager hands in their notice on a Friday. The next phase starts in three weeks, the client is chasing and the subbies are asking who is in charge. Here is how to hire a site manager UK builders can rely on, from the brief to the first fortnight.

A site manager runs the job day to day. They look after the programme (the job schedule), the subbies (subcontractors), safety, quality and the client on site.

The short answer: how do I hire a site manager in the UK?

Write a brief for this particular site. Check tickets properly, but don't stop at a card. Interview with real scenarios, speak to a referee about their worst day, and do a right-to-work check before they start. Then put the offer in writing and plan the first 14 days.

Each step is covered below, with links to the official pages.

Write the brief for this site

A good brief saves weeks. Spend five minutes on it before you advertise.

Write down:

• The work. New build, refurb or commercial? What size and value?
• The crew. How many trades and subbies will they run at once?
• The tasks. Programme, ordering, quality checks, safety paperwork, client updates.
• Must-haves and nice-to-haves. Keep the must-have list short.
• Pay, hours and start date. Put the pay in the ad.
• Tickets. Many employers ask for SMSTS, a CSCS card that matches the role, and First Aid. These are common employer asks, not a legal rule for every site. Decide which ones you need for this job and say why.

An empty site manager seat costs money every week. The free hiring cost check helps you check what an empty site manager seat costs you.

SMSTS and CSCS: what they prove and what they do not

These two get mixed up all the time. They prove different things.

SMSTS stands for Site Management Safety Training Scheme. CITB runs it as a five-day course for site managers and supervisors. It covers health and safety law, the Construction (Design and Management) Regulations 2015, risk assessments and site set-up. The certificate is valid for five years.

CSCS stands for Construction Skills Certification Scheme. It issues cards that show a worker has the right training and qualifications. The CSCS Manager card needs a relevant construction management or technical NVQ or SVQ at level 4, 5, 6 or 7, plus the CITB Managers and Professionals health, safety and environment test.

Here is the catch for hiring:

• SMSTS alone doesn't get you a CSCS card. CSCS says SMSTS and SSSTS courses are not accepted as part of a card application.
• A card isn't proof of competence on its own. CSCS says a card covers skills and knowledge, but competence also includes experience and behaviours that employers have to assess.
• A card isn't proof of right to work. More on that below.

In Northern Ireland, many sites ask for a Construction Skills Register (CSR) card. CEF NI says the CSR is accepted as equivalent to CSCS in Great Britain. Check each site's own rules, because the principal contractor decides who gets on site.

Where to find candidates

The best site managers are often already working. They won't be scrolling job boards.

• Referrals. Ask your best subbies, suppliers and clients' project teams who they'd follow. This is often the fastest route.
• LinkedIn search. Search by job title and area. LinkedIn's help page shows how to use capitals for AND, OR and NOT, and quote marks for phrases. This is called a Boolean search.
• Your own network. Past site managers, assistant managers and senior foremen who've moved on.
• An agency, only when speed matters. If you need someone this month and have no time to interview, an agency can fit. Know the fee terms first.

Whatever route you use, put the pay in the ad. It saves time for you and for the applicant.

Interview for competence beyond the card

A ticket tells you what someone studied. An interview tells you how they run a site.

Ask every candidate the same questions. Take notes and score each answer straight after.

1. Work has been stopped on site. What do you do? A solid answer is calm and clear. They make the area safe, find the cause and tell the right people.
2. The client changes the design late. What happens? They check the impact on cost and time, get it agreed in writing and update the trades.
3. A subbie starts improvising instead of following the drawings. What do you do? They stop it early, explain the issue and check the work against the drawing.
4. The programme is two weeks behind. What do you do? They find the real cause, talk to the trades and tell the client early.
5. How do you coordinate trades day to day? They talk about a morning plan, a look-ahead, deliveries and a quick end-of-day check.
6. Tell me about a job that went wrong. They own their part and say what they changed.

Our post on how to find reliable subcontractors in the UK is useful here, because a site manager is only as good as the trades they can call on.

Red flags

Pause if you see any of these:

• Answers with no names, dates or job sizes.
• Blaming everyone else for every problem.
• Leaning on tickets and nothing else.
• No questions about your site, your crew or your standards.
• Dodging the worst-day question.
• Won't name a referee.

References and right to work

References. Ask for two referees, ideally a boss and someone who worked under them. Try these:

• "What was their worst day on site? What did they do?"
• "How did they deal with subbies who ran late?"
• "Would you hire them again?"

The free 7 Hiring Mistakes report and Recruiter's Toolkit includes checklists for references and interviews.

Right to work. You must check that a job applicant is allowed to work in the UK before you employ them. GOV.UK says you can check their right to work online with a share code, check their original documents, or use an identity service provider. British and Irish citizens can't get a share code, so you check original documents or use a provider.

Keep copies of the documents and the date you made the check. GOV.UK says to keep them for the whole time the person works for you and for two years after.

GOV.UK also has a right to work checklist for employers.

A CSCS card is not a right-to-work check. CSCS says plainly that a card is not proof of someone's right to work. For more, see right to work checks in construction (UK).

Offer, induction and first 14 days

Put the offer in writing: role, pay, hours, start date and who they report to.

Most site managers are taken on as employees. Employees go through PAYE (Pay As You Earn), the tax system for employee pay. Subcontractors fall under CIS (the Construction Industry Scheme) instead. GOV.UK says you must tell HMRC about a new employee on or before their first payday. For CIS, GOV.UK says contractors must check whether they should employ the person instead, and may get a penalty if the person should be an employee. The page on employment status explains the difference.

Plan the first 14 days before they arrive:

1. Day 1. Site induction, a walk of the job and introductions to key trades.
2. Week 1. Shadow you or the project lead, then run one stage with someone close by.
3. Day 10. A short catch-up. What's going well, what's unclear?
4. Day 14. Agree what they take over fully.

On induction, HSE says suitable site inductions must be provided, and the principal contractor must ensure all workers have site-specific inductions. Your new site manager may help run them, but check who holds that duty on your job.

Our post on how to keep good tradies covers what happens after the first fortnight.

Agency vs learning to hire

An agency can make sense for speed or a senior role you can't fill alone. Read the fee terms first. Our guide to recruitment agency fees in the UK and Ireland explains how they charge.

You can do the brief, the interview and the reference check yourself. It takes hours, not weeks. Our post on in-house recruitment vs agency in construction compares the two.

HiredConstruction is not an agency. We teach builders in the UK and Northern Ireland, with a base in Belfast, to run their own hiring.

To see where your hiring stands today, try the free hiring scorecard.

General information only. It is not legal or tax advice. Check GOV.UK, HMRC and the Home Office for the rules that apply to you.

Want help with your next hire?

Book a free 15-minute discovery call and we will talk through your next hire. Prefer to learn it yourself? The Construction Hiring System course, UK and Ireland edition (£249), teaches the full method.

FAQ

How do I hire a site manager in the UK?

Write a brief for the site, check tickets like SMSTS and CSCS properly, and ask the same scenario questions of every candidate. Speak to two referees, do a right-to-work check before they start, and put the offer in writing. Then plan their first 14 days so they know what good looks like.

Is SMSTS enough to hire a site manager?

No. SMSTS is a five-day CITB safety course for site managers and supervisors. It shows they've been trained in site safety management. It doesn't show they can run programmes, trades and clients. CSCS also doesn't accept SMSTS for a card application. Check experience and ask scenario questions too.

What interview questions should I ask a site manager?

Use real scenarios. Ask what they do when work is stopped, when the client changes the design late and when a subbie improvises. Ask how they recover a programme that is two weeks behind and how they coordinate trades each day. Look for specific examples and clear ownership.

Is a CSCS card proof of right to work?

No. CSCS says a card only shows that a worker has the training and qualifications for their job. It isn't proof of the right to work in the UK. Employers must do a right-to-work check as GOV.UK describes, before the person starts, and keep a record of it.

Should I use a recruitment agency for a UK site manager?

You can, especially if you need someone fast or have no time to run the process. Agencies charge fees, so read the terms first. Many builders can do the hiring themselves with a good brief, set questions and proper reference checks. Learning how also helps with every hire after this one.