Treatment Plant Operator Trainee III

Job Title

Job Identification 100487

Posting Date 08/04/2026, 09:20 PM

Job Schedule Full time

Locations 10 E. Grand Avenue, Saint Louis, MO, 63147, US 201 Hoffmeister Avenue, Saint Louis, MO, 63125, US

Minimum Salary $62,732.80

Maximum Salary $68,452.80

Job Description

Essential Functions:

• Support 24/7 operations.
• As a trainee, operate, maintain, and adjust a variety of pumps, blowers, compressors, conveyors, sludge controls, air diffusers, filters, tanks, collectors, chemical equipment, mixer valves, incinerators, and other mechanical, instrumentation and electrical equipment.
• Take samples of sewage at various stages.
• Clean plant units such as bar screens, comminutors, grit removal units, heat exchangers, aeration tanks and equipment, chlorinators, sludge pumps and pipe galleries.
• Replenish chemical solution tanks, unload chemicals, perform routine plant maintenance and cleaning work.
• Operate electrical and computer controls, as needed.
• Responsible for good housekeeping in assigned work areas.
• Keep records.
• Assist plant trades employees.
• Meet requirements of the Wastewater Operator Training Program.

Additional Responsibilities:

Perform related work as required or as delegated by Senior Operators, Team Leaders, and Supervisor.

Qualifications

Training and Experience:

• Graduation from high school or equivalent AND successful completion of an approved Water Quality Control Program OR successful completion of at least one year of on-the-job experience and/or training.
• Must possess a Missouri Class "D" wastewater treatment operator's license or another state's equivalent.

Desirable Knowledge, Skills, and Abilities:

• Good knowledge of the operation and maintenance of pumps, motors, and related electrical and mechanical equipment.
• Knowledge of safe work practices.
• Ability to take accurate readings.
• Keep records and make reports.
• Ability to learn quickly and follow prescribed routines.

SPECIAL REQUIREMENT:

• Must have and maintain a Missouri Class "D" wastewater treatment operator's license.
• Must possess a valid driver's license by the state in which the employee resides.
• Pursuant to MSD's "Substance Abuse Policy and Procedures," this position has been designated as safety sensitive, and candidate must pass a Non-D.O.T. Drug Test for this position. Employees occupying this position are not subject to Federal (D.O.T.) Drug and Alcohol Testing Regulations.
• Employees of MSD must have a meets expectations.

Metropolitan St. Louis Sewer District