Waterworks Maintenance Mechanic​/Operator

Waterworks Maintenance Mechanic / Operator

Public Works Department

June 30, 2026

Open Until Filled

$31.38/ hourly

$32.95/ hourly

$36.24/ hourly

Medical, Dental, Voluntary Vision, Life and Disability Insurance; FSA; HSA;
Lagers Pension- L6 Tier and Deferred Compensation program;
Paid Vacation;
Paid Holidays;
Employee Assistance Programs and Educational Benefits.

Non-exempt

Full time

The City of Saint Charles Public Works Department is currently recruiting for the position of Waterworks Operator. The purpose of this position is to perform a variety of semi-skilled and skilled technical work in the operation & maintenance of water treatment facilities and systems.

• Operate and maintain all water treatment plant systems, pump stations, generators, gauges, pumps, filters, controls and equipment.
• Collect bacteriological and all other samples as required by MDNR.
• Monitors the performance of and operates and maintains all equipment, electrical systems, gauges, and charts in the treatment plant, pump stations, generators, pumps, filters, and other control systems;
  Record data concerning plant operations
• Charts lab test results for trend analysis and maintains accurate records of analysis and test results; evaluates data and writes reports as required.
• Collects samples and identifies concentrations of chemical characteristics of water required in accordance with local, State and Federal requirements; gathers and tests water samples for reports as required.
• Perform quality control tests on lab equipment and lab analysis; chart tests results for trend analysis; and evaluate procedures to assure accuracy of test results.
• Calibrate and modify instrumentation and control equipment including recorders and other water quality monitoring equipment.
• Mandatory attendance and participation in:
  Days & Nights rotating schedule as follows:
  Work
  
  Shifts:
  
  6:30AM-6:30PM(AM) & 6:30PM-6:30AM(PM) & 4-hour Friday Shift
  • Saturday-PM, Sunday-PM, Wed-PM, Thurs-PM, 4hr-shift Fri(PM), Mon(PM) , Tues(PM), 4-hr shift Friday(PM), Change to 12-hr Day Shift: Sat(AM), Sun(AM), Wed(AM), Thurs(AM), 4-hr shift Friday(PM), Mon(AM), Tues(AM), 4-hr shift Friday(PM), à Repeat )
• Assigned overtime as necessary to cover other shift openings.
• Mathematically proficient in addition, subtraction, multiplication, division, geometry, trigonometry, and calculation of percentages, fractions, decimals, volumes, ratios, etc.
• Receives after hour emergency phone calls while on duty and notifies appropriate Public Works supervisors, on-call personnel, and Public Works Management.

• High school diploma or G.E.D. supplemented by two (2) years post-secondary college or technical training in biology, environmental science, chemistry or a closely related field and two (2) years' experience in a utility, or any combination of education and experience that provides equivalent knowledge, skills, and abilities.
• Working knowledge of equipment, facilities, materials, maintenance and operation activities, including laboratory procedures.
• Valid Missouri driver's license required.
• Department of Natural Resources Class C (B, or
  
  A) Water Treatment Plant Operator Certification Preferred. Minimum requirement of Class D Certification within 6 months with ability to obtain Class C or higher certification within 18 months of hire.

A Water Maintenance Worker/Operator must be capable of performing physically demanding work in a variety of outdoor and indoor environments. The position requires the ability to…