Maintenance Mechanic-Water and Sewer

Job Title: Maintenance Mechanic – Water & Sewer

Location: City of O'Fallon, Missouri

Status: Full-Time

Join Our Team!

The City of O'Fallon, Missouri is seeking a skilled and dependable Maintenance Mechanic – Water & Sewer to support the operation, maintenance, and repair of critical water and wastewater systems across the City. If you're a hands‑on professional who takes pride in high‑quality, technical work that directly supports public health and essential services, this is an excellent opportunity to make a meaningful impact.

The pay range for this position is $27.28-$34.10 DOQ.

• Support 24/7 operations for the Water Treatment Plant, Wastewater Treatment Plant, Water Wells, and Sewer Pump Stations
• Repair, install, test, and inspect hydraulic, mechanical, electrical, and SCADA systems
• Perform preventative and predictive maintenance on water and sewer facilities
• Diagnose equipment deficiencies and conduct advanced troubleshooting
• Analyze and repair motor control panels, electrical control equipment, and high‑voltage systems (220V/480V)
• Utilize specialized test equipment such as megohmmeters and volt‑ohm meters
• Maintain pneumatic, hydraulic, electronic, and computer‑based control systems
• Inspect and repair instrumentation, PLCs, sensors, transmitters, wiring, and VFDs
• Perform welding, cutting, and installation/repair of process piping
• Operate machinery and heavy equipment including skid steers, wheel loaders, cranes, vacuum/jet trucks, and backhoes
• Assist with purchasing parts, tools, and safety equipment
• Maintain buildings, grounds, lagoons, and various City facilities
• Complete accurate record‑keeping and daily equipment readings
• Assist with snow‑removal operations and emergency response
• Provide functional supervision in the absence of a supervisor
• Perform additional duties that support overall Water & Sewer Operations

• Considerable knowledge of mechanical equipment maintenance and repair
• Knowledge of pumping processes and associated equipment
• Working knowledge of pneumatic, hydraulic, electrical, and electronic control systems
• Ability to read wiring diagrams and blueprints
• Understanding of safety procedures related to high‑voltage equipment
• Skill in repairing SCADA, instrumentation, and control systems
• Skill in operating specialized equipment and hand/power tools
• Ability to troubleshoot mechanical, electrical, and electromechanical systems
• Effective oral and written communication skills
• Ability to use computers and mobile devices for data entry and system monitoring

• High school diploma or GED
• Ability to lift up to 50 lbs. and maneuver equipment up to 100 lbs.
• Ability to work on‑call evenings, weekends, and in all weather conditions
• 1–2 years of experience, apprenticeship, or internship in a related field
• Possession of, or ability to obtain, a Class A Commercial Driver's License with tanker endorsement (Missouri)
• Ability to obtain Missouri DNR Drinking Water Treatment, Water Distribution, and Wastewater Treatment certifications, as well as MWEA Collection System Operator certification

The City of O'Fallon values its employees and is committed to supporting their wellbeing, work‑life balance, and long‑term success. Our comprehensive benefits package includes:

• Medical, Dental, and Vision Insurance
• Employer‑paid Accident and Life Insurance
• Optional Health Savings Account (HSA) with employer contributions
• Flexible Spending Accounts (FSAs)
• Optional Pet Insurance
• Reward‑based wellness incentives
• Onsite workout facilities
• Discounted membership at the Renaud Center (Fitness/Aquatic Center)
• Employee Assistance Program (EAP)
• Identity‑Theft Protection
• Designated Zen and lactation rooms in some facilities

• 3 weeks of vacation for new hires
• 11 paid holidays plus 1 personal holiday
• Sick leave
• Extended illness leave for personal or family needs

• Participation in the Missouri LAGERS L‑6 Pension Plan
• 457(b) Retirement Plans
• Tuition reimbursement for continued learning and development

The City of O'Fallon is an Equal Opportunity Employer and participates in E‑Verify.