What Does An Unfilled Fire And Security Engineer Vacancy Really Cost?
When a fire and security engineer leaves a business, the immediate focus is usually on replacing them. However, if recruitment takes longer than expected, it can be easy to overlook what the vacancy is actually costing while it remains open.
On paper, an empty position can even appear to save money because there is no salary being paid. In reality, engineering vacancies rarely exist in isolation. The work still needs to be completed, customers still expect the same service and projects still need to move forwards. The cost is simply shifted elsewhere in the business.
For fire and security companies, that can mean more overtime, greater reliance on subcontractors, reduced engineering capacity, delayed work and additional pressure on managers and existing engineers. In some cases, the biggest cost is not additional expenditure at all, but the work the company is unable to take on because it does not have enough engineering resource.
So, what does an unfilled fire and security engineer vacancy really cost, and at what point does waiting for the right person become more expensive than recruiting earlier?
An Empty Vacancy Does Not Mean The Work Disappears
The simplest way to understand the cost of an engineering vacancy is to look at what happens to the workload after somebody leaves.
A service engineer may have been completing planned preventative maintenance visits, reactive call-outs and fault finding across a particular region. An installation engineer may have been committed to several projects over the coming months. A commissioning engineer might have had specialist knowledge that was essential for completing particular systems.
When that engineer leaves, those responsibilities normally have to be divided between the remaining team. The company may be paying one less salary, but it has also lost a large number of productive engineering hours every month.
This matters because engineering headcount is directly linked to the amount of work many fire and security businesses can deliver. If a department is designed around ten engineers and suddenly operates with nine for several months, the workload has not necessarily reduced by ten per cent to match.
Overtime Is Often The First Hidden Cost
One of the most common ways to deal with a vacancy is to ask existing engineers to cover more work. This can be an effective short-term solution, particularly if the business expects to replace the engineer quickly.
The problem comes when short-term cover becomes the normal way of operating.
Extra service visits, longer journeys, weekend working and additional call-out duties can all increase overtime costs. Even where overtime is readily available, there is also a limit to how much additional work one engineer can reasonably absorb without affecting the rest of their workload.
There is a people cost as well. An engineer who regularly has to cover the work of a missing colleague may become less satisfied with their own position, particularly if the additional workload continues for months. The business can then find itself trying to recruit one engineer while increasing the risk of losing another.
This is one of the reasons fire and security recruitment works better when companies plan ahead. Recruitment becomes considerably more difficult when a vacancy has already reached the point where the existing team is struggling to cope.
Subcontract Support Can Protect Capacity, But It Still Has A Cost
Subcontract engineers play an important role in the fire and security industry. They allow companies to respond to project peaks, urgent requirements and temporary shortages without permanently increasing their headcount.
Using subcontractors to cover an open permanent position can therefore make good commercial sense. It allows the business to continue delivering work while taking the time required to recruit the right permanent engineer.
However, prolonged subcontract cover is still a cost that should be included when assessing the impact of the vacancy. If additional external resource is being brought in every week simply because a permanent engineer has not been replaced, the apparent saving created by the empty salary can quickly reduce.
This does not mean subcontract support is the wrong solution. In many cases it is precisely what allows a business to maintain service levels while recruitment takes place. The important point is that the cost of that cover forms part of the real cost of leaving the position unfilled.
Reduced Engineering Capacity Can Mean Reduced Revenue
Perhaps the largest hidden cost is the work that cannot be completed or accepted.
A fire and security company may have a healthy pipeline of projects, new maintenance opportunities or customers asking for additional work. However, winning work and having the capacity to deliver it are two different things.
If an installation team is already fully committed, another project may require additional engineering resource before it can be accepted. A service department may reach the point where adding another maintenance contract would put too much pressure on existing response times. A specialist commissioning requirement might have to wait because the engineer with the necessary experience has left.
These situations do not always appear against a recruitment budget, but they still have a financial consequence. The business may be losing revenue simply because the engineering capacity is not available to deliver more work.
An unfilled vacancy can therefore become a bottleneck. The company may have the customers, the sales opportunities and the projects available, but without enough engineers there is a limit to how much of that demand can be converted into completed work.
Projects Can Become More Difficult To Manage
Engineering shortages also have a knock-on effect on project delivery.
When there are fewer engineers available than planned, project managers often have to move people between sites, alter schedules or prioritise whichever project has become most urgent. One project may progress well for several days before an engineer has to be moved elsewhere to solve another problem.
Individually, these changes may seem manageable. Over a period of weeks, they can make project delivery considerably less efficient.
Completion dates may move, commissioning can be delayed and other trades may be affected because the fire or security work has not progressed as expected. Delays can also affect invoicing and the ability to release engineering resource onto the next project.
The cost of an engineering vacancy can therefore spread well beyond the missing engineer. It can affect project managers, customers, other engineers and the overall capacity of the business.
Service Departments Feel The Pressure Differently
Service engineering vacancies create a slightly different challenge because much of the work cannot simply be postponed until somebody becomes available.
Planned maintenance visits need to be completed. Reactive faults continue to arrive. Call-out rotas still need to be covered and customers expect an appropriate level of support when systems develop problems.
A service department operating below its planned headcount can often maintain performance for a period by reorganising diaries and increasing workloads. Over time, however, the lack of spare capacity becomes more noticeable.
Engineers may have to cover larger geographical areas, appointments can become harder to schedule and managers have less flexibility when emergency work appears. Customers may not immediately know that the business has an engineering vacancy, but they may begin to experience the consequences of it.
That is where the cost becomes harder to measure. Customer dissatisfaction, slower response times and reduced flexibility do not necessarily produce an immediate invoice, but they can influence customer retention and future opportunities.
Management Time Is Part Of The Cost Too
Another area that is easily overlooked is the amount of management time consumed by an unfilled role.
Service managers may spend additional time rearranging engineer diaries. Project managers may have to coordinate subcontract cover or repeatedly move engineers between sites. Operations teams can become involved in filling gaps, while directors may be pulled into resourcing decisions that would normally be handled further down the business.
Recruitment itself also takes time. CVs need to be reviewed, interviews arranged and feedback provided. When managers are already dealing with the operational consequences of a vacancy, recruitment can easily move down the priority list.
This can create an unfortunate cycle. The vacancy increases the manager’s workload, which makes it harder for them to devote time to recruitment, which means the vacancy stays open for longer.
Waiting For Applications Can Extend The Vacancy
There is also a difference between advertising a vacancy and actively recruiting for it.
Fire and security is a specialist employment market, and many experienced engineers are already working. They may be perfectly willing to consider another opportunity, but that does not mean they are regularly searching online job boards.
Companies can therefore advertise what appears to be a strong position and receive fewer suitable applications than expected. This is particularly common where the requirement involves specific systems knowledge, manufacturer experience, commissioning skills or experience within a particular type of customer environment.
Employers relying only on inbound applications can miss good fire and security engineers who rarely apply through job boards. Reaching those engineers often requires a more proactive search rather than waiting for them to find the vacancy themselves.
If that approach only begins after several unsuccessful weeks of advertising, the business has already extended the period in which it is operating without the engineer it needs.
Senior Engineers Can Be Particularly Difficult To Replace
The cost of a vacancy also depends heavily on who has left.
An experienced senior engineer may provide much more than a set number of engineering hours each week. They may understand key customer sites, know how to resolve unusual faults, support less experienced engineers or hold specialist knowledge of particular systems and manufacturers.
When someone with that level of experience leaves, the knowledge gap can be difficult to replace immediately. Even a technically strong new engineer may need time to understand the company’s customers, processes and expectations.
This is part of the reason companies can struggle to replace senior fire and security engineers. There may simply be fewer people in the market who combine the required technical ability, systems experience and customer-facing skills.
For these vacancies, waiting until the situation becomes urgent can be particularly costly because there may not be an immediately available engineer who matches everything the business requires.
How Can A Business Calculate The Real Cost Of A Vacancy?
There is no useful universal figure for the cost of an unfilled fire and security engineering role. A service engineer vacancy in a regional maintenance team will have a different impact from losing a senior commissioning engineer who supports major projects.
Instead, businesses can look at the actual effects of the vacancy and build their own picture.
This might include:
- Additional overtime being paid to existing engineers.
- Subcontractor or temporary engineering costs.
- Chargeable engineering hours that are no longer available.
- Projects that have been delayed because of limited resource.
- Work that cannot be accepted because the team is already at capacity.
- Additional travel created by engineers covering larger territories.
- Extra pressure on call-out rotas.
- Management time spent reorganising work or finding cover.
- Recruitment time spent repeatedly reviewing unsuitable applicants.
- Any noticeable impact on customer service or response times.
Some of these costs will be easy to calculate, while others will require an estimate. The purpose is not to produce a perfectly accurate number down to the last pound. It is to recognise that the cost of the vacancy extends much further than the salary that is currently not being paid.
When Does Recruitment Become Urgent?
Ideally, recruitment should begin before the business reaches the point where it urgently needs somebody to start.
Not every vacancy can be predicted. Engineers resign unexpectedly and workload can increase quickly. However, many future requirements are visible well in advance.
A new contract may require additional service capacity. A major project could need more installation engineers. Expansion into a new area may create a requirement for somebody local to that region. An existing engineer may already be working their notice.
Starting recruitment earlier does not mean rushing to hire somebody unnecessarily. It simply gives the business more time to understand who is available and what it may take to attract the right person.
That extra time can be particularly valuable when approaching passive engineers who may need to be introduced to an opportunity, meet the employer and work through their notice period before they can start.
Filling The Vacancy Quickly Is Not The Same As Filling It Well
There is an important balance to strike. The cost of leaving a vacancy open should not encourage employers to hire the first available engineer simply to increase headcount.
A poor appointment creates its own costs. The engineer may require more supervision than expected, lack important technical knowledge or ultimately leave after a short period, taking the business back to the beginning of the recruitment process.
The aim should be to remove unnecessary delays while still maintaining the standard required for the role.
That starts with understanding which skills are genuinely essential, which areas can be trained and what package is realistic in the current market. The clearer the requirement is at the beginning, the easier it becomes to identify suitable engineers and make confident decisions when the right person is found.
So, What Does An Unfilled Fire And Security Engineer Vacancy Really Cost?
For most companies, the answer is much more than the salary of the person who has left.
The true cost can include overtime, subcontract cover, reduced engineering capacity, project delays, additional management time and missed opportunities to take on new work. It can also place greater pressure on the engineers who remain and make customer service harder to maintain.
The longer a vacancy remains open, the more opportunity there is for those costs to accumulate.
That does not mean every engineering vacancy needs to be filled immediately. It does mean businesses should look at recruitment as part of their wider operational planning rather than waiting until a shortage becomes critical.
If another engineer would increase capacity, reduce overtime, protect existing staff and allow the business to deliver more work, the expensive part may not be recruiting them.
It may be operating without them for too long.
Complete Security Recruitment works exclusively across the fire and electronic security industry, helping companies recruit permanent engineers and other experienced industry professionals throughout the UK.
If you have an engineering vacancy coming up, or want to understand what the current candidate market looks like before recruitment becomes urgent, speak to CSR on 01708 737744.
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