Waterworks Maintenance Mechanic / Operator

Stcharlescitymo; Missouri; On-site; USD 65,000 - 75,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Life insurance

Disability insurance

FSA

HSA

Pension L6

Deferred compensation

Paid vacation

Paid holidays

Employee assistance

Educational benefits

Job summary

The City of Saint Charles Public Works Department is seeking a Waterworks Maintenance Mechanic/Operator to operate and maintain water treatment facilities and related equipment. This non-exempt, full-time role requires rotating day/night shifts and potential overtime to ensure uninterrupted water service.

Responsibilities include sampling, data recording, lab testing, and maintaining plant instrumentation, with required certifications and a valid MO driver’s license.

Qualifications

• High school diploma or GED with 2 years post-secondary training and 2 years utility experience.
• Valid Missouri driver's license.
• Department of Natural Resources Class C (B, or A) Water Treatment Plant Operator Certification Preferred; minimum Class D with ability to obtain Class C or higher within 18 months.

Responsibilities

• Operate and maintain water treatment plant systems, pump stations, generators, gauges, pumps, filters, controls and equipment.
• Collect bacteriological and other samples as required by MDNR.
• Monitor performance of equipment and record data; operate control systems and charts; write reports as required.
• Collect samples and test water characteristics per local, state and federal requirements; prepare reports.
• Perform quality control tests on lab equipment and chart results.
• Calibrate instrumentation and control equipment including recorders and water quality monitoring equipment.
• Work rotating shifts including days, nights, and 4-hour Friday shift; overtime as needed.
• Respond to emergency calls and notify supervisors.

Education

High school diploma or GED with 2 years post-secondary training in biology/environmental science/chemistry or closely related field and 2 years utility experience

Job description

Job Title

Waterworks Maintenance Mechanic / Operator

Department

Public Works Department

Posting Date

June 30, 2026

Closing Date

Open Until Filled

Salary – C Certification

$31.38/ hourly

Salary – B Certification

$32.95/ hourly

Salary – A Certification

$36.24/ hourly

Comprehensive Cost Effective Benefits Package

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.

Exempt/Non-exempt

Non-exempt

Status

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.

Essential Duties and Responsibilities

• 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.

Minimum Training and Experience Required to Perform Essential Job Functions

• 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 safely perform the following essential physical functions:

• Frequently lift, carry, push, and pull materials, tools, and equipment weighing up to 50 pounds and occasionally up to 100 pounds with assistance or appropriate equipment.
• Perform strenuous manual labor for extended periods of time.
• Walk, stand, bend, stoop, kneel, crouch, crawl, climb, and reach while performing maintenance and repair activities.
• Enter and work within trenches, excavations, vaults, pits, and other confined spaces in accordance with safety regulations.
• Climb ladders, stairs, embankments, and uneven terrain.
• Operate hand tools, power tools, valves, hydrants, pumps, and heavy equipment requiring manual dexterity and hand‑eye coordination.
• Work in awkward positions and confined areas for extended periods.
• Distinguish colors, gauges, warning lights, and utility markings necessary for safe operation and maintenance activities.
• Hear verbal instructions, alarms, and warning signals in noisy environments.
• Maintain balance and coordination while working on wet, slippery, uneven, or elevated surfaces.
• Perform emergency repairs during adverse weather conditions, including extreme heat, cold, rain, snow, and ice.
• Work outdoors for prolonged periods and be exposed to dust, dirt, noise, chemicals, fumes, and other environmental conditions associated with water distribution system maintenance.
• Operate motor vehicles and equipment safely and effectively.
• Wear and utilize required personal protective equipment (PPE), including respiratory protection when necessary.
• Respond to emergency callouts and work extended hours, including nights, weekends, holidays, and overtime as required.

The City of Saint Charles is an Equal Opportunity Employer and participates in E-Verify