Mackay is the service centre for the northern Bowen Basin. A large share of the region's contracting businesses are based here, along with the workshops, the labour pool and most of the medical and training providers the industry depends on.
That concentration is the advantage and the constraint at the same time.
The shape of a Mackay contracting business
Most Mackay contracting companies servicing coal share a profile:
- Several clients at once, rather than one. Work moves between operators as shutdowns and campaigns come up.
- Teams that travel, on drive-in-drive-out or short rosters into Moranbah, Dysart, Coppabella, Middlemount and the Goonyella system.
- Plant that travels with them, which is a second compliance problem running in parallel with the first.
- A workforce that already holds Queensland coal credentials, because they have worked in the industry before.
That last point is genuinely valuable — hiring locally means hiring people who already have Standard 11 and a current coal mine workers' health assessment (formerly known as the coal board medical). It also creates the specific trap of this region: you inherit their expiry dates, and they are frequently not what anybody assumed.
A new starter who "has all their tickets" may have a Standard 11 with fourteen months left, a medical with four, and a site induction for an operator you do not work for. None of that is visible without checking, and none of it announces itself.
The medical bottleneck
The coal mine workers' health assessment — required under the Coal Mine Workers' Health Scheme — is needed on entry to the industry and at least every five years. It is not one fixed test: the components vary by role and by state. It is conducted or supervised by an Appointed Medical Adviser (AMA), a doctor from the RSHQ-approved list appointed by the employer.
Mackay is better served than Emerald or Moranbah. It is also where a very large proportion of the Bowen Basin workforce lives, and demand is not evenly spread. Around shutdown seasons, when several contracting companies mobilise teams simultaneously, availability tightens sharply.
Two things follow:
Twelve weeks is the planning horizon, not four. A worker whose assessment lapses in three weeks may simply be unavailable for three weeks.
Your AMA's capacity is the real constraint, not the town's. Because the employer appoints the AMA, your people go where your AMA is. If that is one clinic and your workforce grows, you have a single point of failure that will only reveal itself when several renewals fall due together — which they will, because everybody hired in the same year is due in the same year.
Worth forecasting: pull the distribution of medical expiry dates across your whole workforce and look at it by quarter, not by next-due. If one quarter has eight people in it, that is a rostering problem you can see six months out or discover in the week.
Several clients means several of everything
The generic credentials are done once. Everything else multiplies.
| Credential | Per worker | Per client site |
|---|---|---|
| Standard 11 | Once, five-year refresh | — |
| Health assessment | Once, five-year cycle | — |
| Site induction | — | One per site, usually annual |
| VOC on plant | — | Currency and standard set per site |
| Portal registration | — | One per client that uses one |
| Client-specific extras | — | Whatever that operator has decided |
The right-hand column is where the work is, and it is the column a spreadsheet handles worst — because the number of cells is workers multiplied by sites multiplied by requirements, and each cell has its own date.
The same table exists again for plant, with services, inspections, certifications and fitment requirements assessed against each site.
Living with client portals
Every operator will nominate a portal, and with four clients you will be in four of them.
The mistake is trying to make one of them your system of record. A portal holds the slice of your workforce its owner cares about, in its owner's format, on its owner's schedule. None of them can see the others. None of them will tell you that eleven people have credentials lapsing next month across three clients, or that the team you need for a shutdown in Moranbah has a gap.
Keep your own register as the source of truth and treat the portals as somewhere you publish evidence into. Contracting companies that invert that arrangement find out about lapses at whichever gate happens to notice first — which is the most expensive possible way to learn it, because it happens in front of the client.
What actually costs money here
Not the credentials. Standard 11 is a two to three day course, and the medical is a morning.
What costs money is:
- A team turned around — the travel, the day's pay, the client's opinion.
- A machine refused — the float, the reschedule, the team standing beside it.
- A shutdown you could not fully staff because two people were short of something and nobody knew until the roster was built.
- A renewal you could not book because it was noticed three weeks out in a town where three weeks is not enough.
Every one of those is a scheduling failure rather than a compliance failure. The credential was always going to expire on that date. The only variable was whether anybody could see it coming.
