What it pays
Government survey numbers — not estimates, not ads.
Half of all Chemical Plant and System Operators in the U.S. earn more than $78,120 a year — the middle 80% land between $48,400 and $111,930. About 16,610 people in the U.S. do this work. Figures are for the U.S. occupation group “Chemical Plant and System Operators”. (U.S. Bureau of Labor Statistics survey, published 2025.) In India, Plant and machine operators and assemblers earn about ₹17,329 a month on average — around ₹2.1 lakh a year (government PLFS survey via ILOSTAT, occupation-family figure).
$78,120typical pay / year
16,610people in this work
$111,930+top 10% earn
₹2.1 lakha year in India (family avg)
Think you get this job?Six quick questions on how it really works — with a hint and the reason behind every answer.
Test yourself →The work, task by task
These are the real jobs-to-be-done, not a wish list. Each task shows where we found it, and the prompt underneath is written for that exact task.
Analysing2
Control the chemical production process
+Control the reactor run tonight: hold temperature at 180°C, keep feed rate at 120 kg/h, watch pH between 6.8…
Control the chemical production process
+Control the reactor run tonight: hold temperature at 180°C, keep feed rate at 120 kg/h, watch pH between 6.8 and 7.2, log any deviations, and notify Shift Lead Sarah by text if an alarm trips within the hour.
The tools that do the workDistributed control system DCSAlarm management systemESCOjob descriptionsO*NETWikipedia
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Start pumps for washing, rinsing, or regulating flow
+Start the wash pumps for Batch 47 at 07:30: confirm valves 4 and 5 are set, ramp pumps to 60 percent to avoid…
Start pumps for washing, rinsing, or regulating flow
+Start the wash pumps for Batch 47 at 07:30: confirm valves 4 and 5 are set, ramp pumps to 60 percent to avoid pressure spikes, verify rinse water conductivity drops below 20 µS/cm, and sign off the start in the shift log when steady.
The tools that do the workcontrol boardsjob descriptionsO*NET
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Fixing2
Repair or replace damaged equipment.
+Repair the leaking metering pump on Line B: isolate the pump, tag out energy sources, replace worn seal with…
Repair or replace damaged equipment.
+Repair the leaking metering pump on Line B: isolate the pump, tag out energy sources, replace worn seal with spare from cabinet 3, test at 50 percent speed, run sample for contamination, and update maintenance log and notify Maintenance Supervisor Carlos when complete.
The tools that do the workInterlock shutdowncontrol boardsjob descriptionsO*NETWikipedia
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Maintain equipment and instruments
+Perform routine maintenance on the dosing skids: change filters, calibrate flow transmitter AFT-2, tighten…
Maintain equipment and instruments
+Perform routine maintenance on the dosing skids: change filters, calibrate flow transmitter AFT-2, tighten loose fittings, record calibration results and spare parts used, then hand the completed checklist to Reliability Engineer Mei before the end of shift.
The tools that do the workcontrol boardsESCOjob descriptionsWikipedia
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Move1
Patrol work areas to prevent overflow or hazards
+Patrol the east and neutralization areas every hour for the next shift: check sump levels, open vents, look…
Patrol work areas to prevent overflow or hazards
+Patrol the east and neutralization areas every hour for the next shift: check sump levels, open vents, look for drips or vapour, collect a grab sample if odor or sheen appears, and call Environmental on 555-211 if any overflow or suspicious reading occurs.
The tools that do the workAlarm management systemjob descriptionsO*NET
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The daily work14
Test chemical samples
+Collect the batch 47A grab samples from reactor 3, run the pH, conductivity and titration checks, record…
Test chemical samples
+Collect the batch 47A grab samples from reactor 3, run the pH, conductivity and titration checks, record results on the lab sheet, flag any out-of-spec readings to Shift Chemist Maria by 14:30 and attach the signed chain-of-custody before shift end.
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Basic chemicals
+Walk the alkali storage and dosing skids, confirm reagent types and inventory levels against the material…
Basic chemicals
+Walk the alkali storage and dosing skids, confirm reagent types and inventory levels against the material safety sheet, note concentration and expiry on the chemical control log, and report any mismatches or low stock to Maintenance Lead Javier by 10:00.
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Draw samples and conduct quality control tests
+Draw the scheduled process and product samples from reactor 2A, label each bottle with batch 47B, run pH and…
Draw samples and conduct quality control tests
+Draw the scheduled process and product samples from reactor 2A, label each bottle with batch 47B, run pH and density checks, record results and deviations, and hand the samples to QC on the 14:00 courier for release testing.
The tools that do the workAlarm management systemjob descriptionsO*NET
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Operate machines and systems
+Operate the feed pump, agitator and heat exchanger for shift B according to the batch sheet, monitor…
Operate machines and systems
+Operate the feed pump, agitator and heat exchanger for shift B according to the batch sheet, monitor temperatures and pressures, respond to any alarms, and log any manual interventions and reasons before shift handover.
The tools that do the workDistributed control system DCSControl boardsESCOO*NET
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Collect samples for laboratory analysis
+Collect grab samples from sampling points SP-3 and SP-7 at 09:30, purge the lines, fill amber vials to the…
Collect samples for laboratory analysis
+Collect grab samples from sampling points SP-3 and SP-7 at 09:30, purge the lines, fill amber vials to the mark, cap and freeze per procedure, complete chain-of-custody form, and dispatch to the lab on the 10:00 run.
The tools that do the workCoordinated incident management system CIMSjob descriptionsWikipedia
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Gauge tank levels, using calibrated rods.
+Measure solvent tank level with the calibrated dip rod, record strike and corrected true level, convert to…
Gauge tank levels, using calibrated rods.
+Measure solvent tank level with the calibrated dip rod, record strike and corrected true level, convert to volume using the tank calibration chart, note temperature correction applied, and report any discrepancy to the shift supervisor with measurement evidence.
The tools that do the workMicrosoft ExcelO*NET
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Calculate material requirements or yields according to formulas.
+Calculate the batch material needs for batch 48C using the recipe formula, include expected yield, overage…
Calculate material requirements or yields according to formulas.
+Calculate the batch material needs for batch 48C using the recipe formula, include expected yield, overage for losses, and required reagent mass, then file the calculation and attach it to the batch sheet before charging.
The tools that do the workMicrosoft ExcelO*NET
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Defrost frozen valves, using steam hoses.
+Defrost the frozen inlet valve on Line 5 by routing steam through the valve heating coil, monitor valve…
Defrost frozen valves, using steam hoses.
+Defrost the frozen inlet valve on Line 5 by routing steam through the valve heating coil, monitor valve temperature and downstream pressure during the operation, keep work area clear, confirm valve moves freely and holds pressure, then record the procedure in the shift log.
The tools that do the workInterlock shutdownO*NET
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Inspect operating units like towers and tanks
+Walk the sulfur recovery unit, inspect towers, exchangers and storage tanks for leaks, corrosion, abnormal…
Inspect operating units like towers and tanks
+Walk the sulfur recovery unit, inspect towers, exchangers and storage tanks for leaks, corrosion, abnormal vapour, and gauge readings, take and label any grab samples, photograph defects, and log findings in the unit shift book before handover at 07:00.
The tools that do the workDistributed control system DCScontrol boards, panelboardsjob descriptions
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Interpret chemical reactions through sight glasses or monitors
+Check the reactor sight glasses and on-line monitors for colour, phase separation, bubbles, and deposits,…
Interpret chemical reactions through sight glasses or monitors
+Check the reactor sight glasses and on-line monitors for colour, phase separation, bubbles, and deposits, note any deviations from standard reaction appearance, record temperature and pH from the same sample point, and flag the control room if trends suggest off-spec reaction.
The tools that do the workDistributed control system DCSAlarm management systemjob descriptions
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Follow safety procedures during all operational tasks
+Perform every task using the plant safety checklist: confirm permits and isolations, wear required PPE,…
Follow safety procedures during all operational tasks
+Perform every task using the plant safety checklist: confirm permits and isolations, wear required PPE, follow hot work and confined-space steps, verify interlocks active, and pause work to call the shift supervisor if any unsafe condition or unexpected reading appears.
The tools that do the workInterlock shutdownCoordinated incident management system CIMSWikipedia
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Implement process improvements to increase efficiency
+Review last quarter throughput and bottle‑neck times, propose one test change to reactor residence time or…
Implement process improvements to increase efficiency
+Review last quarter throughput and bottle‑neck times, propose one test change to reactor residence time or heat duty to improve yield, run the mass‑balance check, draft the change request with expected benefits and risks, and submit it to the process engineer by Friday noon.
The tools that do the workMicrosoft ExcelWikipedia
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Coordinate with other operators and engineers during operations
+During the turnaround, coordinate valve lineups and sampler schedules with unit operators and the process…
Coordinate with other operators and engineers during operations
+During the turnaround, coordinate valve lineups and sampler schedules with unit operators and the process engineer, confirm handover points in the shift log, call out any live isolations, and close the communication loop when tasks are complete.
The tools that do the workCoordinated incident management system CIMScontrol boards, panelboardsWikipedia
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Good manufacturing practices
+Follow good manufacturing practice on every batch: confirm batch sheet steps, verify reagent identity and…
Good manufacturing practices
+Follow good manufacturing practice on every batch: confirm batch sheet steps, verify reagent identity and quantities, record in-process checks, quarantine off‑spec material, and sign the batch record at completion so quality can trace any deviation.
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Says who?
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Built on public evidence: O*NET®, ESCO, Wikipedia, U.S. Bureau of Labor Statistics, ILOSTAT. All sources & licenses
Built on public evidence: O*NET®, ESCO, Wikipedia, U.S. Bureau of Labor Statistics, ILOSTAT. All sources & licenses