EXPOSED
Continuous monitoring of pressures, flows, and compressor loads is exactly what SCADA and advanced process control already do better than a human watching a board, and shift-log writing and trend analysis are trivially automatable. What survives is the physical half: walking the unit, lining up valves, hanging tags for lockout/tagout, isolating a leaking flange, and making the judgment call to trip or blow down a train during an upset before anyone can model it. Employers are consolidating control rooms and running more plants per operator, so headcount shrinks even where the field role stays.
Mixed — a routine tier and a judgment tier. Board work — trending suction pressure, adjusting dehydrator regeneration cycles, logging odorant injection rates — is already sitting inside DCS loops and APC, but the field half (lining up a compressor for start, draining a knockout pot, changing amine filters, walking a hot bolt-up) is still hands and wrenches, which is why this lands mid-band at 11 rather than down with pure console jobs.
Hands-on in uncontrolled environments. You are climbing to the top of a stabilizer tower in weather, entering H2S-monitored areas with a four-gas meter, torquing flanges on live hydrocarbon service, and pulling relief valves for bench testing — uncontrolled, hazardous, and irreducibly physical, which is why this is 16 and not lower; it stops short of 20 only because a real share of the shift is spent seated at the console.
Certification preferred, not legally required. No state licence gates the job: OSHA 1910.119 PSM and the operating permit put liability on the facility and the PSM-covered process, not on your name, and what you carry personally is OSHA 10/30, H2S/SCBA, confined-space entry and LOTO authorization plus company operator qualification — real credentials that take months to earn, which is why 8 rather than 3, but nothing a regulator can pull from you individually.
Anonymous artifact production. Nobody buying residue gas at the tailgate knows or asks which operator was on nights; the customer relationship is a contract and a meter ticket, and your credibility is internal — with the console partner, the relieving shift, and the maintenance planner who trusts your written turnover — which is worth a few points but not a product.
Exists to be accountable for ambiguous calls. When a train upsets at 0300 with the engineer 200 miles away, you decide whether to ride it out, hot-shutdown, or blow to flare, and you make that call on incomplete instrumentation with sour gas and public exposure on the line under the plant's emergency procedures; the 14 rather than 18 reflects that most shifts run inside written operating limits and SOPs where deviation is escalated, not chosen.
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