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WWTP Operator I or II - Laboratory

City of Jefferson
Jefferson, MO Full Time
POSTED ON 7/30/2026
AVAILABLE BEFORE 9/29/2026

Join the City of Jefferson’s Public Works Department and play an important role in protecting our community and environment! We are seeking a Wastewater Treatment Plant Operator I or II to join our Wastewater Laboratory team. This position is responsible for sample collection and laboratory analysis of wastewater samples as it pertains to the NPDES permit and plant process control. Maintains spreadsheets in accordance to the NPDES permit and federal, state, and local laws and regulations. Position level (Operator I or II) is based on qualifications, experience, and certifications.

Collects wastewater, biosolids, industrial, and environmental samples from the treatment plant, collection system, and other designated locations. Performs laboratory analyses and field testing in accordance with approved procedures and regulatory requirements.

Maintains laboratory data, quality control records, and regulatory documentation. Reports abnormal laboratory results or process trends to supervisory staff.

Performs routine maintenance, calibration, and verification of laboratory equipment and instruments.

In addition to Operator I duties, Operator II employees perform advanced laboratory analyses for process control and regulatory compliance, conduct quality assurance and quality control (QA/QC) activities, monitor hydrogen sulfide (H2S) at the treatment plant and within the collection system, and assist in restaurant Fats, Oils, and Grease (FOG) inspections.


Physical: Ability to work in extreme weather conditions. Ability to lift, bend, squat, twist, stoop, reach, climb and stand. Ability to sit or stand for extended periods. Ability to work with hazardous chemicals. Ability to lift up to 50 pounds. Ability to traverse over rough terrain.

Mental: Ability to understand and follow written and oral directions. Ability to effectively communicate orally and in writing. Ability to understand, apply and utilize chemical and mathematical equations and calculations. Ability to understand State and Federal regulations regarding wastewater treatment and its effects. Ability to follow standard methods for laboratory analytical procedures. Ability to understand methods, practices and equipment in wastewater treatment and apply to process control. Ability to work efficiently under stressful conditions. Ability to understand and follow safe procedures.

Education/Experience Qualifications

Level I:
Requires a high school diploma or equivalent. Must obtain a Missouri Class D Wastewater Treatment Plant Operator License within twelve (12) months of hire.

Level II:
Requires two years of relevant experience or a bachelor's degree in environmental science, biology, chemistry, engineering, or a related field. Requires a Missouri Class C Wastewater Treatment Plant Operator License.

Specific job title and salary depend on qualifications. The annual salary ranges for both positions are:

Wastewater Operator I – Laboratory is $42,880.74 - $64,321.13

Wastewater Operator II – Laboratory is $47,276.02 - $70,914.04

This job description is not intended to be all-inclusive. Employees may be expected to perform other duties as necessary for the effective operation of the department and the City.

Salary : $42,881 - $64,321

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