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Facility Operator

Essential Utilities · University Park, IL · Full time

Posted Sep 21, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a time you found and fixed a problem with equipment.

What they are checking: Whether they have practical mechanical troubleshooting skills, since operators are often the first to diagnose a failing pump or valve.

Tell me about a time you worked alone and had to make a decision.

What they are checking: Whether they can make sound calls on their own during off-hours shifts.

What does protecting public health mean to you in this job?

What they are checking: Whether they see the job as more than running equipment and take the responsibility seriously.

What would you do

A chlorine residual reading comes back low. What do you do?

What they are checking: Whether they know how to respond quickly to protect public health and when to report.

A pump fails during the night. What do you do?

What they are checking: Whether they can troubleshoot, switch to backup and escalate so service isn't interrupted.

How would you handle a heavy rain event at a wastewater plant?

What they are checking: Whether they understand high flows and the steps to prevent overflows or permit violations.

About the work

What water or wastewater operator certifications do you hold or plan to earn in Illinois?

What they are checking: Whether they have or can get the state licenses required to operate treatment facilities.

Walk me through the daily checks you'd do at a treatment facility.

What they are checking: Whether they understand routine rounds, readings and logs that keep a plant running safely.

How do you stay safe around chemicals and confined spaces at a plant?

What they are checking: Whether they follow lockout, PPE and confined space procedures, which prevent serious injuries.

Why are accurate operating records and sample results so important for a regulated utility?

What they are checking: Whether they understand that records are reviewed by regulators and errors can cause violations.

Practice this interview out loud.

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The full job description

As published by Essential Utilities.

Aqua, an Essential Utilities company, employs people in a variety of roles within our eight-state footprint, ranging from field workers and customer service representatives who are on the front lines working with customers, to scientists and engineers who help ensure we’re delivering reliable water and wastewater services to our communities. If you’re looking for a rewarding career helping improve our environment and protect our natural resources, we encourage you to join our team! About Essential Utilities Essential Utilities, Inc. delivers safe, clean, reliable services that improve quality of life for individuals, families, and entire communities. Operating as the Aqua (water and wastewater services) and the Peoples and Delta (natural gas) brands, Essential serves approximately 5.5 million people across 10 states. We are committed to sustainable growth, operational excellence, a superior customer experience, and premier employer status - including a competitive and comprehensive benefits package as well as a commitment to career growth opportunities. We are advocates for the communities we serve and are dedicated stewards of natural lands, protecting more than 7,600 acres of forests and other habitats throughout our footprint. Our company is one of the most significant publicly traded water, wastewater service and natural gas providers in the U.S. JOB SUMMARY: Are you looking for a fantastic career at Aqua? We have a great opportunity for a Facility Operator Trainee. This role is under the direction of the Field Supervisor and will perform a variety of activities to support the operation of wastewater treatment facilities, lift stations, booster stations, distribution system, and the wastewater collection system. ESSENTIAL DUTIES: • Maintains equipment at the assigned wastewater production facilities and booster stations. • Maintains equipment at the wastewater treatment facilities and lift stations. • Operates and maintains sewer collection systems including collections mains and pump stations. • Troubleshoots and repairs service piping. • Performs routine water quality analysis in accordance with established processes and procedures. • Makes operational adjustments as needed to comply with state and federal water quality standards. • Adjusts chemical treatment to ensure water quality meets standards. Calculates various ratios and dosages. • Completes customer service work orders, updates and maintains appropriate system documentation of activities and closes work orders in accordance with department policies and procedures. • Assists with other tasks or projects as assigned KNOWLEDGE, SKILLS AND ABILITIES: • Understand computers / tablets and the basic operation of database, spreadsheet and word processing programs preferred • Ability to read, understand and accurately follow operating instructions both written and verbal. • Mathematical ability to perform calculations to determine various ratios, dosages, volumetric calculations that are required for the operation of the Wastewater Treatment Plants. • Excellent interpersonal skills and ability to communicate in writing • Familiarity with and understanding of the need to prevent wastewater pollution of area waters. • Understand and maintain plant processes through computer-controlled equipment. • A team player able to work effectively in a team fostered multi-tasking environment QUALIFICATIONS (Required Experience, Education, Licenses, and Certifications): • A high school diploma, GED or the equivalent • A valid U.S. Driver’s License, company Pool Vehicle will be provided for work purposes only. • Trainees hired into this position are required to have a valid U.S. driver’s license and must obtain a Class-B CDL with Tanker and Air Brake endorsements. Within 90 days of the date of hire, the new employee or transferee must obtain a CDL permit and US DOT medical card. Within 90 days of company sponsored hands-on CDL training, the employee must obtain a Class-B CDL with Tanker and Air Brake endorsements. • Candidate will be required to successfully pass either a Water or Wastewater license general examination within 18 months of employment per the Career Progression Schedule. CAREER PROGRESSION • FO Trainee (Entry Level) – Will be required to get either a Class 4 water or Class 4 wastewater license within 18 months of employment. • FO I – Minimum license requirement of Class 4 water or Class 4 wastewater. • FO II – Minimum license requirement of Class 4 water and Class 4 wastewater. • FO III – Minimum license requirement of Class 3 water and Class 3 wastewater. COMPENSATION: The hourly rate for the Facility Operator Trainee position starts at $30.00 per hour . Compensation may increase based on applicable licenses, certifications, and relevant experience in accordance with the terms of the applicable collective bargaining agreement (CBA) with the union. Aqua, an Essential Utilities company is an Equal Opportunity / Affirmative Action employer. Equal employment opportunity is provided to all employees and applicants for employment without regard to the following legally protected characteristics: race, color, religion, sex, national origin, age, pregnancy (including childbirth and related medical conditions, including medical conditions related to lactation), physical or mental disability, covered-veteran status, genetic information (including testing and characteristics), sexual orientation, gender identity or expression or any other characteristic protected by applicable local, state or federal law. Aqua is committed to providing reasonable accommodation to individuals with disabilities. If you have a condition that may prevent you from applying for a job online or need to request an accommodation during the interview process, please call (1-877-271-9012). To maintain the integrity of the recruitment process and to avoid real or perceived conflicts of interest due to employment and/or assignment of family members and personal referrals, specific guidelines apply to the hiring and assignment of these individuals including, but not limited to: • Family members cannot result in a supervisor/subordinate reporting relationship • Family members cannot work in the same department.

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