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Water Treatment Maintenance/Operator III

City of Midlothian
Midlothian, TX Full Time
POSTED ON 11/18/2025 CLOSED ON 12/17/2025

What are the responsibilities and job description for the Water Treatment Maintenance/Operator III position at City of Midlothian?

  • Starting Hiring Range: $62,672.06-76,773.28**

Under direct supervision, this position performs work in the inspection, operation, and maintenance of the City’s water treatment plants and pumping facilities to ensure safe, potable water for municipal and public use in accordance with Texas Commission of Environmental Quality and Environmental Protection Agency regulations.

  • Performs the required TCEQ water testing procedures by checking treatment process at each sample point.
  • Performs water lab analyses of samples collected, including PH, alkalinity, chlorine, ammonia, NTU, and chlorine dioxide tests.
  • Interprets the results of lab tests and makes chemical and pumping flow changes.
  • Verifies the calibration of lab equipment.
  • Monitors the treatment process by checking the chemical pumps, high service pumps, filters, and treatment equipment. Verifies chemical settings.
  • Verifies Chemical Settings and observes flocculation and sedimentation basins.
  • Monitors the distribution of water usage using SCADA.
  • Checks the elevated storage tank levels.
  • Responsible for keeping a safe work environment including but not limited to, cleaning hazardous chemical spills and containment areas, removal of blockages in water and debris and clutter from workspaces, and basic cleaning of work and break facilities.
  • Responsible for organizing activities and functions during assigned shift.
  • Assists with training of operators.
  • Receives chemical deliveries, puts up supplies, changes light bulbs, sweeps and mops floors, and takes out the trash.
  • Makes copies of records as needed.
  • Performs all other duties as assigned.

High school diploma or GED equivalent is required.

Minimum of three (3) years of experience in water treatment is required. Technical training in water treatment field is preferred.

Any equivalent combination of education and experience will be considered.

  • Advanced knowledge of city and departmental practices, procedures, systems, and federal, state, and local laws, regulations, codes, ordinances, and best practices relating to the treatment and distribution of drinking water.
  • A comprehensive, practical knowledge of a technical field with use of analytical judgment and decision-making abilities appropriate to the work environment of the organization.
  • Knowledge of and ability to correctly interpret, explain, and apply laws, rules, operations, practices, procedures, regulations, and policies.
  • Basic knowledge of hazardous chemicals, lab equipment and procedures and chemistry and mathematical principles.
  • Ability to work with complicated formulas, equipment, and chemicals.
  • Ability to interpret charts, flow diagrams, maintenance manuals, and instructions.
  • Knowledge, skill, and ability to utilize telephone, fax machines, computers, and applicable software daily including, but not limited to, Supervisory Control and Data Acquisition (SCADA) systems, Microsoft Office, Microsoft Outlook, Laserfiche, and other required software/applications.
  • Advanced ability to read a variety of materials including papers, periodicals, journals, manuals, dictionaries, thesauruses, and encyclopedias, to deal with system of real numbers, practical application of fractions, percentages, ratios/proportions, and measurement and to write reports, prepare business letters, expositions, and summaries with proper format, punctuation, spelling, and grammar, using all parts of speech.
  • Advanced ability to learn and perform basic operational, technical, and office processes.
  • Advanced skill level in data entry and preparing accurate reports.
  • Ability to allocate and utilize limited resources in a cost-effective manner.
  • Advanced ability to be organized and have efficient management of time and deadlines.
  • Advanced ability to communicate in a clear, effective, and concise manner, both orally and in writing.
  • Ability to follow instructions, safety practices, and perform work accurately and thoroughly which requires performing multiple tasks simultaneously under time pressures and deadlines.
  • Ability to establish and maintain effective working relationships and work as a team.
  • Ability to regularly interact with others and exchange and receive information, providing effective and tactful customer service, and work independently with a high level of discretion.
  • Advanced ability to interact with people in a professional and congenial manner.
  • Ability to effectively supervise staff in a proactive, appropriate, and productive manner.
  • Ability to perform minor mechanical repairs.
  • Ability to be punctual and attend work regularly.

Special Requirements

Subject to be on-call during non-working hours.

Works 12 hour shifts.

Must be able to work flexible hours, including nights, holidays, and weekend.

This position is classified as a safety-sensitive position and is subject to random drug and alcohol testing during the course of employment.

Licenses & Certifications

TCEQ Water Class C (Surface Water) license is required.

TCEQ Water Class B (Surface Water) license is required, or must be obtained within 2.5 years of employment.

Must possess and maintain a valid driver’s license with acceptable driving record as established by the City of Midlothian driving standards.

Work Environment

Work is performed in both outside (occasionally during inclement weather) and inside (climate and non-climate controlled) facilities. May be exposed to heights, confined spaces, noise, gases, and hazardous chemicals. Physical demands are sedentary in nature with prolonged sitting. Work causes fatigue of eyes, fingers or other faculties because of fairly continuous use of motor senses. May be called upon to perform heavy manual labor which involves lifting, carrying, and pushing objects weighing up to 50 pounds. May be subject to extended periods of standing, bending, reaching, kneeling, and climbing ladders.

Salary : $62,672 - $76,773

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