What is the long-term stable employment often tied to in capital-intensive assets that might last 40 years or more?

Answer

The operational and maintenance phases, existing entirely because of the initial colossal capital expenditure.

While construction creates intense employment spikes, the stable, long-term jobs are those required for the decades-long operation and upkeep of the established physical assets.

What is the long-term stable employment often tied to in capital-intensive assets that might last 40 years or more?
jobCapitalIndustryenergy