Openings come from growth and from separations, and separations dominate. Retirements are the largest component in occupations with an older-than-average workforce, which is why several shrinking occupations still show enormous annual openings. An aging workforce produces hiring demand independently of whether the occupation itself is expanding.
Openings are two things added together
Every openings figure in the projections combines jobs created by growth with jobs vacated by people leaving the occupation permanently. For most large occupations the second is not merely bigger — it is nearly the whole number.
Someone reaching the end of their career vacates a position that has to be filled by somebody. Across a large workforce that produces a steady stream of hiring which has nothing to do with whether the occupation is growing, and it is the most predictable component of the entire projection, because the ages of the current workforce are already known.
Where it concentrates
Occupations with an older-than-average workforce: several skilled trades, transportation, parts of manufacturing and much of the public sector. These frequently show flat or negative projected growth alongside substantial annual openings, and those openings are real jobs somebody will be hired into.
The pattern is easy to spot once you know to look: low growth, high openings relative to employment. That gap is people leaving, and in an older workforce most of them are leaving for good rather than for a competitor.
What this data can and cannot show
Being straight about the limit: the projections publish total separations, not a retirement breakdown, and the tables used here carry no age data at all. So the openings-minus-growth gap captures retirement and ordinary churn together, and the two behave very differently.
You can tell them apart by context rather than by column. High turnover in food service and retail is churn — waiters run about 19.6 per cent turnover a year and cashiers 17.2 per cent, and those are people moving to other work, not retiring. High turnover in a skilled trade with a long training route is much more likely to be retirement, because people who spent four years qualifying do not casually leave.
Why nobody writes about it
Because coverage follows growth, and growth is the smaller term. An occupation described as declining attracts no career advice whatsoever, even while it hires steadily every year for a decade.
That is a genuine information failure rather than a subtlety. The occupations with the least competition for entry are frequently the ones nobody is told about, precisely because the headline number attached to them is negative.
The catch worth knowing about
Replacement openings in an occupation with an older workforce usually come with a knowledge gap. When experienced people leave in numbers, the informal understanding leaves with them, and employers who did not plan for it end up hiring into roles they can no longer teach well.
For an entrant that cuts both ways: it is easier to get in and harder to learn once there. Worth asking directly at interview who trained the last person and whether they are still around.
The advantage of arriving during a handover
If you do land somewhere mid-retirement-wave, the upside is unusual. Progression is faster because the layer above you is thinning, and knowledge that would normally take a decade to acquire is being actively transferred by people with a reason to pass it on.
The people who benefit most from these situations are the ones who arrive early enough to overlap with the generation leaving. Arriving after they have gone is a much worse version of the same job.
How to find these situations
Look for occupations with low or negative projected growth and high annual openings relative to their size. Then check whether the training route is long — apprenticeship or long-term on-the-job training — which points to retirement rather than churn.
That combination is where the least competitive hiring in the entire projection sits, and it is almost never the subject of an article, because every filter anybody publishes sorts by growth.
Common questions
What is the largest source of openings?
Separations rather than growth — people leaving occupations permanently, with retirement the biggest component in older workforces.
Why is it predictable?
Because the ages of the current workforce are already known, which makes it the most dependable part of any projection.
Where does it concentrate?
Occupations with an older-than-average workforce: several skilled trades, transportation, parts of manufacturing and much of the public sector.
Why is it rarely discussed?
Coverage follows growth, so an occupation labeled declining attracts no advice even while it hires steadily for a decade.
What is the catch?
Experienced people leaving take informal knowledge with them, so entry can be easier while learning the job is harder.
What is the biggest source of job openings?
Separations rather than growth — people leaving an occupation permanently. It is also the most predictable part of any projection, because the current workforce's ages are known.
Can the data separate retirement from ordinary churn?
No. The projections publish total separations with no age breakdown, so you distinguish them by context: high turnover in food service is churn, high turnover in a long-training trade is likely retirement.
What is the catch with retirement-driven openings?
The informal knowledge leaves with the people. Entry is easier and learning is harder, so ask who trained the last person and whether they are still there.