Treatment Plant Operator Trainee

The Metropolitan St. Louis Sewer District provides comprehensive wastewater and storm water management services to residents and businesses in both St. Louis City and County. As one of the most recognized employers in the region and a fixture in the downtown area, MSD employs over 900 individuals in a wide-range of roles including skilled crafts and laborers, engineering, information technology, finance, human resources and administration support.

We invite you to be part of the team!

Saint Louis, MO, United States

• Job Identification 100413
• Posting Date 02/09/2026, 01:59 PM
• Job Schedule Full time
• Locations 10
  
  E. Grand Avenue, Saint Louis, MO, 63147, US
• Minimum Salary $55,411.20
• Maximum Salary $60,548.80

• Support 24/7 operations.
• As a trainee, operate, maintain, and adjust process systems and a variety of pumps, blowers, compressors, conveyors, sludge controls, air diffusers, filters, tanks, collectors, chemical equipment, mixer valves, incinerators, and other mechanical, instrumentation, computer process controls and electrical equipment.
• Take samples of wastewater and other process flows and perform basic wastewater laboratory analysis.
• Clean plant units such as bar screens, communutors, 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.
• Keep records.
• Assist plant's trades employees.
• Replenish chemical solution tanks.
• Unload chemicals.
• Perform routine plant maintenance and cleaning work.
• Meet requirements of the Wastewater Operator Training Program.

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

• Graduation from high school, equivalent, or vocational school PLUS basic knowledge in the operation and maintenance of mechanical equipment.
• Must be able to obtain a Missouri Class "D" wastewater treatment operator's license within 1 year of placement in this position.

• Some knowledge of the operation and maintenance of pumps, motors, and related electrical and mechanical equipment.
• Ability to use common hand tools effectively.
• Working knowledge of safe work practices.
• Ability to take accurate readings, keep records, logs, and make reports.
• Ability to learn quickly and follow prescribed routines.
• Ability to read, comprehend, and pass exams given on wastewater training program materials and manuals.

• Missouri Class "D" Wastewater Treatment Plant Operator's license must be obtained prior to progression to Treatment Plant Operator Trainee III.
• Must possess a valid driver's license issued by the state in which the employee resides.
• Pursuant to MSD's "Substance Abuse Policy and Procedures," this position has been designated 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.