Wastewater Plant Working Supervisor IV - WS-13

Salary : $86,280.00 Annually
Location : Future vacancies with immediate vacancy in Hilo, HI
Job Type: Permanent & Temporary Positions
Job Number: 2025-00198
Department: Environmental Management
Division: Wastewater
Opening Date: 12/28/2025
Closing Date: 1/6/2026 11:59 PM Hawaii

Duties Summary
Assists in the supervision and participates in the operation and maintenance activities in a Class III or IV wastewater treatment plant and lower classed plants in a district, as well as its related tributary pumping plants, equipment, and facilities; and performs other related duties as required.

There is one (1) immediate permanent full-time vacancy with the Department of Environmental Management - Wastewater Division in Hilo.

The eligible list may be used for other permanent and temporary vacancies as they arise during the life of the list. Temporary appointment may lead to conversion to permanent appointment.

Special Working Conditions: Exposure to hazardous, filthy, and/or obnoxious conditions; may also be subject to shift, weekend, and holiday work as required.
Examples of Duties

• Assists in the supervision and participates in the operation and maintenance of pumps and auxiliary equipment to control the flow of wastewater, air, and sludge through the various stages of the treatment process.
• Supervises and participates in reading, recording, and interpreting data from meters, gauges, and other recording devices to maintain or improve plant operations.
• Supervises and participates in the inspection of plant and mechanical equipment for malfunctions, irregularities, and needed repairs; participates in lubricating, changing oil, repairing, and making adjustments to machinery and equipment; paints equipment, building, and other plant structures.
• Supervises and participates in the operation of chemical feed systems; collects samples and performs chemical and physical laboratory analyses; maintains records and prepares various operational reports.
• Participates in the preparation of work schedules and work assignments for the maintenance and operation of the wastewater plant and pumping stations.
• Participates in evaluating employee's job performance; recommends approval or disapproval of leaves; prepares timesheets and periodic operational reports on man hours expended, materials and equipment used, and work status.
• Participates in the training of employees; explains policies, departmental procedures, and applicable laws; advises operators on wastewater treatment procedures and techniques, and the proper operation and maintenance of the equipment and plant.
• Supervises and participates in the investigation and resolution of complaints.
• Submits requests for tools, equipment, materials, and supplies to supervisor; makes recommendations for various needs during annual budget preparation.
• Enforces and complies with all Federal, State, and County laws, regulations, and policies relating to occupational safety and health; takes precautions to safeguard facilities and equipment and maintain a safe working environment.
• Operates a motor vehicle to transport personnel, equipment, and materials.
• Responds to emergency calls.
• Attends training seminars, workshops, and conferences to meet continuing educational requirements.
• Performs other related duties as assigned.
• Participates in evaluating employee's job performance; recommends approval or disapproval of leaves; prepares timesheets and periodic operational reports on man hours expended, materials and equipment used, and work status.
• Participates in the training of employees; explains policies, departmental procedures, and applicable laws; advises operators on wastewater treatment procedures and techniques, and the proper operation and maintenance of the equipment and plant.
• Supervises and participates in the investigation and resolution of complaints.
• Submits requests for tools, equipment, materials, and supplies to supervisor; makes recommendations for various needs during annual budget preparation.
• Enforces and complies with all Federal, State, and County laws, regulations, and policies relating to occupational safety and health; takes precautions to safeguard facilities and equipment and maintain a safe working environment.
• Operates a motor vehicle to transport personnel, equipment, and materials.
• Responds to emergency calls.
• Attends training seminars, workshops, and conferences to meet continuing educational requirements.
• Performs other related duties as assigned.

Minimum Qualification Requirements
Training and Experience:
A combination of education and experience substantially equivalent to:

• experience of sufficient scope and quality to competently perform journey level duties of a Wastewater Plant Working Supervisor IV, and
• possession of a valid permanent Hawai'i Mandatory Wastewater Treatment Plant Operator IV Certificate at time of filing (scan and attach a copy of your valid certificate to your application), and
• possession of a valid State of Hawai'i driver's license (Class 3) or any other valid comparable driver's license at time of filing (You will be required to submit your valid driver's license at time of hire.), and
• possession of a good driving record certified by a traffic abstract confirming no DUI convictions, license revocations, or suspensions for three (3) years preceding and no moving violations for one (1) year preceding. A current traffic abstract is valid for 30 days from date of issuance by the district court. (You will be required to submit your current traffic abstract at time of job interview.)

Notes:

• a current Department of Transportation Medical Examiner's Certificate is required prior to appointment, and
• a valid State of Hawai'i driver's license (Class 4, non-CDL) is required prior to completion of probation.

Examination: All applicants who meet the minimum qualification requirements will be assigned a score of 70 points. An education and experience evaluation will be conducted based on the applicant's training, education and experience as presented in the application.

Please read the minimum qualification requirements carefully. Be certain to list all pertinent training and experience, as this may be important in determining your examination score. It is essential that the applicant describe fully the duties and responsibilities of each position held, specify the date of each position held (from and to, month and year), and indicate the number of hours worked per week.

Attach all required documentation (e.g. official transcript, professional license(s)/certification(s), DD-214, etc.) at the time of submitting your application.

Note: In-person interviews and/or further testing in Hawai'i County may be required at the discretion of the hiring department/agency. If in-person interviews and/or further testing are required, applicants who are referred to the hiring department/agency must be available to participate in person and at their own expense at that phase of the selection process.

Knowledge of: departmental policies and standards; practices and procedures used in the operation, maintenance, overhaul, and repair of wastewater treatment and pumping plant equipment; the various types of wastewaters and the associated problems and processes; sampling methods and the physical and chemical tests used in treatment plant control; servicing requirements of moving machinery; hazards and safety practices involved in working around high voltage equipment and moving machinery; plant quality control requirements and measures in dealing with process malfunctions and emergencies; arithmetic; uses of mechanic hand and power tools, materials, and equipment associated with mechanical repair work.

Ability to: assign, supervise, and review the work of others; operate and maintain electrical pumping units and auxiliary equipment, including manual switchover of emergency generator units; instruct others in operational practices and procedures relating to treatment plant equipment; diagnose problems in plant equipment and supervise and participate in their correction; read and understand construction prints, machinery drawings, and manufacturer's manuals; read and interpret meters and gauges; record readings and maintain operating records; perform required laboratory tests and analyze results; input and extract data and reports from computer files; make arithmetical computations; use common hand and power tools; act quickly and effectively in emergencies; understand and follow oral and written instructions; work harmoniously with others; handle weights and loads.
Physical Requirements: Persons seeking appointment to positions in this class must meet the health and physical condition standards deemed necessary and proper to perform the essential functions of the position with or without reasonable accommodations.
Physical Effort Grouping: Heavy

Benefits of County employment: The County of Hawai'i offers a competitive compensation package. Your total compensation is comprised of your salary and a generous range of valuable benefits, subject to eligibility requirements.

• Flexible Working Arrangements: Options may include alternate work schedules (4-10) and flexible working hours. (Not all Departments/Agencies participate and not all positions are eligible.)
• Vacation: Start accruing paid vacation time immediately upon hire - up to 21 days per year.
• Sick Leave: Start accruing paid sick leave time immediately upon hire - up to 21 days per year.
• Holidays: The County provides 13 paid holidays per year (plus General Election Day when applicable).
• Training and Development: The County has a variety of training and development opportunities for employees.
• County Tuition Reimbursement Program: This scholarship program rewards employees who take the initiative to advance their education and learning.
• Public Service Loan Forgiveness (PSLF) Program: You may be eligible for this federal program which forgives portions of federal student loans for individuals working in public service.
• Retirement Plan: The Employees' Retirement System is a qualified defined benefit public pension plan that provides retirement, disability, survivor and other benefits to all eligible full-time and part-time county employees in the State of Hawaii as well as their beneficiaries.
• Deferred Compensation: Save additional money for retirement - this voluntary supplemental retirement savings plan allows for the investment of tax-deferred contributions.
• Flexible Spending Plan: Use pre-tax dollars to pay for qualified dependent care and/or medical expenses, as well as insurance premiums.
• Health Benefit Plans: The County of Hawai'i offers a variety of health benefit plans for eligible employees.
• Employee Assistance Program (EAP): This voluntary assistance program provides employees and their family members with free professional and confidential assistance in overcoming personal and work-related problems.
• Group Life Insurance: Free life insurance policy for active employees.
• Credit Union Membership
• Other Leaves: You may be eligible for other leaves, including Family Leave, Funeral Leave, Leave Sharing, Military Leave, Donor Leave, Victims Protection Leave, as well as leave for Parent-Teacher Conferences, Disaster Relief, Blood Bank Donations, and Jury Duty.

All benefits are subject to eligibility requirements and change due to legislative actions and/or changes negotiated through collective bargaining. Please check out the benefits tab for additional information.

Supplemental Information
Please scan and attach these supporting documents to your on-line application, if required:

• an official college transcript,
• a valid driver's license,
• a temporary assignment verification,
• professional licenses, and/or
• certificates.

Veterans applying for veteran's preference points shall also scan and attach their DD-214 form and as needed, their VA claim letter to the on-line application.

ELECTRONIC NOTIFICATION TO APPLICANTS:
Please ensure that the email address and mobile phone number you provide is current, secure, and readily accessible to you. We will not be responsible in any way if you do not receive our emails and text messages or fail to check your email box or NEOGOV account INBOX in a timely manner. Checking your NEOGOV account INBOX daily is recommended and is the most secure method to check on notices sent to you. This is a new feature created by our vendor, NEOGOV.

Please add info@governmentjobs.com to your contact list. Open your NEOGOV account using your user name and password. In the upper right hand corner of the account is your name, and under your name, click on INBOX to view all notices sent you. The notices will appear here in the INBOX even in the event you don't receive it on your cell phone, computer, or other electronic device. This is the best way to check and view all notices sent to you.

You will receive a confirmation email upon successfully submitting your application. Failure to receive this confirmation email, indicates that your application was not submitted.

APPLICATIONS MUST BE FILED ONLINE AT:
E-mail:
Benefits of County employment: The County of Hawai'i offers a competitive compensation package. Your total compensation is comprised of your salary and a generous range of valuable benefits, subject to eligibility requirements.

• Flexible Working Arrangements: Options may include alternate work schedules (4-10) and flexible working hours. (Not all Departments/Agencies participate and not all positions are eligible.)
• Vacation: Employees start accruing paid vacation time immediately upon hire. 14 hours are earned after a full month of service, which equals to 21 days per year, with a maximum accumulation of 90 working days.
• Sick Leave: Employees start accruing paid sick leave time immediately upon hire. 14 hours are earned after a full month of service, which equals to 21 days per year, with no limitation on the amount of sick leave that may be accumulated.
• Holidays: The County provides 13 paid holidays per year (plus General Election Day when applicable).
• Training and Development: The County provides a variety of training and development opportunities for employees.
• County Tuition Reimbursement Program: Scholarship program for employees who take the initiative to advance their education and learning, subject to eligibility requirements and reimbursement limits.
• Public Service Loan Forgiveness (PSLF) Program: A federal program forgiving the balance of federal student loans for individuals working in public service. For program requirements and additional information, please visit
• Retirement Plan: The Employees' Retirement System is a qualified defined benefit public pension plan covered under Section 401(a) of the Internal Revenue Code. It provides retirement, disability, survivor and other benefits to all eligible full-time and part-time county employees in the State of Hawaii as well as their beneficiaries. For more information visit
• Deferred Compensation: Eligible employees may participate in the Island Savings Plan (a deferred compensation plan as provided under Section 457 of the Internal Revenue Code.) This is a voluntary supplemental retirement savings plan that allows for the investment of tax-deferred contributions into a variety of investment options.
• Flexible Spending Plan: Eligible employees can use pre-tax dollars to pay for their portion of insurance premiums, qualified dependent care and/or medical expenses.
• Health Benefit Plans: The County of Hawai'i offers the following health benefit plans for eligible employees:
  • Medical Plan (HMO or PPO)
  • Vision Plan
  • Dental Plan
  • Prescription Drug Plan

These benefits are administered by the Hawaii Employer-Union Health Benefits Trust Fund. For more information about current employee contribution rates and plans see the EUTF website ().

• Employee Assistance Program (EAP): The County offers a voluntary assistance program which provides its employees and their family members with free professional and confidential assistance in overcoming personal and work-related problems.
• Group Life Insurance: The County provides a free life insurance policy for active employees.
• Credit Union Membership
• Other Leaves: You may be eligible for other leaves, such as: Family Leave, Funeral Leave, Leave Sharing, Military Leave, Victims Protection Leave, Parent-Teacher Conferences, Disaster Relief, Blood Bank Donations, Donor Leave, and Jury Duty.

All benefits are subject to eligibility requirements and to legislative and/or changes negotiated through collective bargaining.
01

REQUIRED SUPPLEMENTAL QUESTIONS. The information provided to these Supplemental Questions may be used in combination with your application to determine whether you meet the minimum qualification requirements and/or your final score. Failure to provide detailed and complete information may result in your application being rejected or you receiving a lower score. Please do not submit a resume in place of completing the Supplemental Questions. Any information you submit may be verified.

When applying for this position, I understand that I must thoroughly complete the Education and Work Experience Sections of my application and the Supplemental Questions. This includes a detailed description of each position that I feel qualifies me for the job I am seeking.

I have read the above statement and understand that failure to provide sufficient detailed information may result in my application being rejected or my receiving a lower examination score. I also understand that I may not submit resumes in lieu of filling out the application or answering the Supplemental Questions. However, I may attach a resume to the application to provide additional information.

• I acknowledge that I have read and understand the above information.

02

Applicants must meet all the requirements for the position they are seeking as of the closing date of the recruitment, unless otherwise specified. Your possession of the required amount of experience will not in itself be accepted as proof of qualification for the position. Overall paid or unpaid experience must be of such scope and responsibility as to conclusively demonstrate that you have the ability to perform the duties of the position. It is essential that you describe fully the duties and responsibilities of each position held, specify the date of each position held (from and to, month and year), and indicate the number of hours worked per week.

Note: Calculation of experience is based on full-time, 40-hour work weeks. Part-time experience must be pro-rated. Example: Twelve months of experience at 20 hours per week is equivalent to six months of experience. In addition, hours worked in excess of 40 hours per week, per work experience, will not be credited. Example: Twelve months of experience at 60 hours per week is equivalent to one year, not one and one-half years.

• I acknowledge that I have read and understand the above information.

03

Do you have the experience of sufficient score and quality to perform the journey level duties of a Wastewater Plant Working Supervisor IV position?

• Yes
• No

04

Do you possess a valid permanent Hawai'i Mandatory Wastewater Treatment Plant Operator Grade IV certificate?
Note: Certificate must show a valid expiration date.
(Scan and attach a copy of your current permanent Hawai'i Mandatory Wastewater Treatment Plant Operator Grade IV certificate to your application.)

• Yes
• No

05

Please describe your work experience in the operation and maintenance of a wastewater treatment plant, while in possession of a Grade IV Certificate. Include the following information:
A. Employer's name
B. Your job title
C. Employment dates (from month/day/year to month/day/year)
D. Hours worked per week
E. Name and grade level of the wastewater treatment plant
F. Date (month/year) you received your Wastewater Treatment Plant Operator Grade IV Certificate
G. Description of your duties in the operation and maintenance of a wastewater treatment plant and the percentage of time you spent performing this work
If you have no work experience, enter N/A.

Be specific and complete ALL questions for ALL experience you are claiming. The following are unacceptable responses:
- See above
- Refer to resume
- See attached

06

Do you have a valid State of Hawai`i driver's license (Class 3) or any other valid comparable driver's license at the time of filing? (You will be required to submit your valid driver's license at time of hire.)

• Yes
• No

07

Do you have a good driving record? At the time of the job interview, you will be required to submit a current traffic abstract confirming no DUI convictions, license revocations or suspensions for three (3) years preceding and no moving violations for one (1) year preceding. A current traffic abstract is valid for 30 days from date of issuance by the district court.

• Yes
• No

Required Question