Assistant Chief Operating Engineer

Salary/Pay Plans

The salary listed above is Step 1 in a structured pay plan. At 6 months of employment with the District, the salary will increase to Step 2: $113,251.06. At 18 months, the salary will increase to Step 3: $119,864.68. There are 9 total steps for TAM 16 of the pay plan (view full pay plan). These increases are based on service time in the job classification and require a 'Meets Standard' performance rating.

Promotional - Introduction

This examination is open only to current District employees who meet the promotional requirements. No other applications will be considered.


Applications will be accepted only during the designated filing period for this examination. The opening and closing dates of the filing period are listed in this announcement. Applications must be filed by the following method:


Submitted online through the District's Online Employment Center at Applications must be submitted by 11:59 p.m. Central Time on the closing date in order to be considered.


The deadline for filing an application will not be extended due to any unavailability of the District's Online Employment Center. The District will not be liable for the Online Employment Center being unavailable for any period of time, and it is the sole responsibility of the applicant to ensure that the application form is completed and submitted in a timely manner. Therefore, it is recommended that applications be submitted early in the filing period.


It is the responsibility of the applicant to ensure that the application form is completed and submitted in a timely manner by the method described above.


Descriptions and dates of experience and any required license or certification should be very clear so that it is understood exactly how the applicant meets the promotional requirements.


Anticipation of Eligibility: An applicant who can demonstrate the likelihood of having the required year(s) of service and civil service status with the District in one of the required job classifications by the anticipation date may be admitted to the examination process. Candidates so admitted, who are successful in the examination process, may not be appointed until evidence is provided that these requirements were fulfilled by the anticipation date. Employees may not hold civil service status in more than one classification. Therefore, achievement of civil service status in the classification that is the subject of this announcement will result in the loss of eligibility for promotional examinations resulting from the possession of civil service status in any former classification.


Veterans' Preference: Veterans' Preference points will be added, in accordance with the District statute, to the scores of those candidates who attain a passing score in all phases of the examination. Veterans' Preference claim forms can be obtained through the District's website, by clicking here, or requested at the test site. An employee who receives a promotion from an eligible list on which he or she received Veterans' Preference points will not be eligible for Veterans' Preference points on any future promotional examinations.


Probationary Period: The probationary period for this classification is one year (250 days worked).


Hiring and Employment Objectives: The Metropolitan Water Reclamation District of Greater Chicago is committed to hiring and employment practices that base employee selection on a candidate's knowledge, skill and ability to perform effectively on the job; provide equal employment opportunity to all applicants; prohibit the entry of political reasons or factors and other improper considerations into any stage of the selection and hiring processes; and create a transparent, honest and fair hiring system.

An Equal Opportunity Employer M/F/D


Reasonable accommodation for individuals with disabilities will be made in accordance with applicable laws. Requests for testing accommodations are to be made within one week after the close of the filing period. For information regarding accommodation for individuals with disabilities, phone View phone number on click.appcast.io (voice) or View email address on click.appcast.io (email).

Promotional - Examination

Duties: Under general supervision, supervises and participates in the operation and maintenance of treatment plant or pumping station equipment within a sewage treatment plant complex.


Absolute Requirement: Must possess a City of Chicago Stationary Engineer's License.


Promotional Requirements: One year of service with the District as an Operating Engineer II. Civil service status as an Operating Engineer II.


Examination: The examination will consist of an oral test, including a written exercise weighted 90%, an efficiency rating weighted 5% and a seniority rating weighted 5%. Candidates must achieve a passing score on each test to have their names placed on the eligible list.


The oral test will assess candidates' knowledge, skill and ability in areas such as operating characteristics and maintenance of pumps, motors, boilers, blowers, generators, digesters, HVAC equipment and related systems including basic interpretation of hydraulic schematics, blueprints and equipment information; diagnosing mechanical, electrical and hydraulic instrumentation equipment malfunctions including response to equipment outage, emergencies, and prioritization of corrective actions; safety practices and procedures; supervisory principles and practices including planning, coordinating and scheduling of work, and interpretation of collective bargaining agreements; and oral and written communication.


Examination Process: All applicants will be advised by email if they have been admitted to the examination process. Applicants who do not receive a response to their application by Thursday, September 3, 2026, should contact the Employee Selection Office at View phone number on click.appcast.io.


ORAL TEST: The oral test will be administered on Thursday, September 17, 2026, Friday, September 18, 2026, and any other dates that may be necessary to accommodate the number of candidates. Candidates will be notified by email of the date, time and place of the oral test.


The use of books, study guides, cell phones, tablets, smartwatches, laptops or other aids during the test is prohibited.

Promotional - Appointments

Appointments will be made from an eligible list with three categories: A (Exceptionally Well Qualified), B (Well Qualified) and C (Qualified). Candidates in the highest category will be given first consideration for appointment. The eligible list has a duration of three years.