Water & Wastewater Systems Technician

City of O’Fallon; O’Fallon (MO); On-site; USD 38,000 - 39,000; Full time

Benefits offered by this job

Medical, Dental, Vision

Paid leave

Pension plan

Tuition reimbursement

Wellness incentives

Job summary

The City of O’Fallon, Missouri, is seeking a skilled Maintenance Mechanic for the Water & Sewer Department. The role supports 24/7 operations, maintaining hydraulic, mechanical, electrical, and SCADA systems across treatment plants and pump stations.

Qualified candidates will have a high school diploma or GED, 1–2 years of related experience or apprenticeship, and the ability to obtain Missouri CDL Class A with tanker endorsement, along with DNR certifications. Equal opportunity employer.

Qualifications

• High school diploma or GED required.
• Ability to work on-call evenings/weekends and in all weather conditions.
• One to two years of relevant experience or equivalent apprenticeship/internship.
• Ability to obtain a Missouri Class A CDL with tanker endorsement.
• Ability to obtain required Missouri DNR certifications in Drinking Water Treatment, Water Distribution, Wastewater Treatment, and MWEA Collection Systems.
• Employees must pursue the highest level of eligible DNR certifications.

Responsibilities

• Maintain, repair, overhaul, install, and inspect hydraulic, mechanical, electrical, and SCADA systems.
• Perform preventative and predictive maintenance on water and sewer facilities.
• Diagnose equipment deficiencies and perform advanced electrical/electromechanical troubleshooting (220V/480V).
• Analyze faults and maintain motor control panels and electrical control equipment.
• Operate hand and machine tools to precise tolerances.
• Utilize test equipment such as megohmmeters and volt-ohm meters.
• Maintain and install controls; service sensors, transducers, PLCs, and VFDs.
• Perform welding, cutting, and process piping repairs.
• Assist with grounds and building maintenance and equipment operation (skid steers, cranes, etc.).
• Support asset management and respond to emergency situations.

Skills

Mechanical maintenance

Pneumatic systems

Electrical systems

SCADA

Wiring diagrams

Safety practices

Communication skills

Education

High school diploma or GED

Tools

Hand tools

Power tools

Computers/mobile devices

Megohmmeters/VP meters

Test equipment

Job description

The City of O’Fallon, Missouri, is seeking a skilled Maintenance Mechanic for the Water & Sewer Department. The role supports 24/7 operations, maintaining hydraulic, mechanical, electrical, and SCADA systems across treatment plants and pump stations.

Qualified candidates will have a high school diploma or GED, 1–2 years of related experience or apprenticeship, and the ability to obtain Missouri CDL Class A with tanker endorsement, along with DNR certifications. Equal opportunity employer.