Maintenance Supervisor (Reliability Maintenance)

Salary: $148,928.00 - $181,043.20 Annually
Location : Plant 1 - 10844 Ellis Ave, Fountain Valley, CA 92708, CA
Job Type: Full-time
Job Number: 487
Department: Operations & Maintenance
Division: Maintenance Support Services
Opening Date: 11/10/2026
Closing Date: 12/1/2026 5:00 PM Pacific

Description
OC San is currently looking to fill the role of a Maintenance Supervisor (Reliability Maintenance).

Under direction, supervises, assigns, reviews, and participates in the work of staff responsible for comprehensive OC San maintenance and repair programs, including treatment plant and recycled water equipment and related facilities, fleet, energy co-generation, wastewater collections, and/or mechanical, electrical, and instrumentation systems; ensures division operations and maintenance functions meet all applicable laws, regulations, and OC San policies; provides complex staff assistance to OC San management in areas of expertise; performs the most technical and complex tasks relative to assigned areas of responsibility; and performs duties as assigned.

When assigned to Reliability Maintenance:

• Plans, prioritizes, assigns, supervises, reviews, and participates in the work of staff responsible for reliability maintenance; performs research, conducts field studies, and analyzes data to develop and implement predictive and preventative maintenance strategies, including condition- and risk-based maintenance to maximize asset performance and lifecycle, minimize operational disruptions, and ensure operational effectiveness.
• Oversees and participates in factory and site acceptance testing for rotating equipment; identifies potential issues and ensures equipment meets design specifications and performs reliably prior to construction and installation.

Qualifications & Requirements
Required:

1. High school diploma or G.E.D. supplemented by specialized training or 60 semester units of coursework from a college or university accredited by the U.S. Department of Education, in construction, business or public administration, maintenance management, or a related field.

2. Six (6) years of progressively responsible work experience in one of the following areas of assignment: pipes and plant facilities, wastewater collection systems, mechanical equipment, facilities maintenance, fleet and heavy equipment, energy co-generation facilities and equipment, preventative maintenance, and/or electrical distribution or instrumentation systems, which may include two (2) years of lead or supervisory experience.

3. A valid California Class C Driver's License.

4. Depending on assignment, must possess or obtain within 12 months of placement in position a:

• Valid Grade IV Certification from the California Water Environment Association appropriate to area of assignment as determined by OC San; and/or
• Valid Certified Maintenance and Reliability Professional (CMRP) and/or valid Certified Maintenance and Reliability Technician (CMRT) from the Society of Maintenance and Reliability Professionals (SMRP); and/or valid Maintenance Management Certification (MMC) from Life Cycle Engineering; and/or Certified Automotive Fleet Manager (CAFM) from National Automotive Fleet Association (NAFA); and/or Certified Building Operator (CBO) from the Building Operator Certification entity; and/or Certified Reliability Leader from Reliability Web; or other similar professional maintenance certification as deemed comparable by OC San; and/or
• Valid hazardous materials endorsement; and a valid manual transmission endorsement.

Desired:

• Valid Vibration Analysis, Ultrasound, Motor Circuit Analysis, Infrared, and/or Oil Analysis Certifications.
• Understanding of Reliability Maintenance principles and best practices, including Reliability-Centered Maintenance (RCM), Root Cause Failure Analysis (RCFA), and Failure Mode and Effects Analysis (FMEA) methodologies, applied in an industrial environment.
• Experience preparing and administering program budgets.
• Experience working with Engineering and Design staff.

Recruitment & Selection Process
Vacancies: 1
(an eligible list may be established for future vacancies)

Apply online at: www.ocsan.gov/careersAPPLICATION FILING DEADLINE: Tuesday, December 1, 2026 by 5:00 PM.(or until a sufficient number of qualified applications have been received)

Hiring Salary Range: $148,928.00 - $164,174.40/Year
(starting salary will be within this range based upon qualifications)

Supplemental Information
Physical Demands

• Mobility to work in a standard office setting and use standard office equipment, including a computer; to operate a motor vehicle and visit various OC San sites, projects, and/or meetings; primarily a sedentary office classification although standing in work areas and walking between work areas may be required; occasionally bend, stoop, kneel, reach, push, and pull drawers open and closed to retrieve and file information; ability to lift, carry, push, and pull materials and objects up to 10 pounds.
• Mobility to work in changing site conditions; to sit, stand, and walk on level, uneven, or slippery surfaces; to reach, twist, turn, kneel, and bend, to climb and descend ladders.
• Perform moderate to medium physical work; lift, carry, push, and pull materials and objects up to a weight of 51 pounds, or heavier weights, in all cases with the use of proper equipment and/or assistance from other staff.
• Vision to read printed materials and a computer screen.
• Vision to inspect site conditions and work in progress.
• Hearing and speech to communicate in person and over the telephone.
• Finger dexterity is needed to access, enter, and retrieve data using a computer keyboard or calculator and to operate standard office equipment.
• Field work requiring frequent walking in operational areas to identify problems or hazards with exposure to hazardous materials in some site locations.

Environmental Elements

• Office environment with moderate noise levels, controlled temperature conditions, and no direct exposure to hazardous physical substances.
• Field work with exposure to loud noise levels, cold and hot temperatures, inclement weather conditions, road hazards, vibration, confining workspace, chemicals, mechanical and/or electrical hazards, hazardous physical substances and fumes, dust, and air contaminants.
• Employees may interact with upset staff and/or public and private representatives in interpreting and enforcing departmental policies and procedures.

Other Requirements

• May be required to work extended hours, including nights, weekends, and holidays when necessary.
• Probationary Period: All OC San employees, except classifications considered "at-will", are subject to the probationary period provisions as specified in the applicable Memorandum of Understanding, policies, and/or resolutions. Employees who have not yet successfully completed their initial probationary period serve "at-will" and may be released from employment without cause or recourse to any appeal or grievance procedures.
• Pre-Employment: All employment offers are contingent upon successful completion of OC San's pre employment process, which includes a background investigation, a physical examination, and a drug screen.
• Work Location Assignment: Employees will be assigned to a work location based on business needs which may be located at any/all of OC San locations; this work location may be changed at any time.

Disaster Service Workers
All OC San employees are designated Disaster Service Workers through state law (California Government Code Section 3100-3109). Employment with the OC San requires the affirmation of a loyalty oath to this effect. Employees are required to complete all related training as assigned, and to return to work as ordered in the event of an emergency.

Other Information
For the full range of duties, responsibilities, and essential job functions please review the Classification Specification for this position found on

Applicants must clearly demonstrate, through their application materials, that they meet the minimum requirements as outlined in the job announcement and class specification to receive further consideration. However, meeting the minimum requirements does not guarantee an interview. All properly completed applications will be reviewed, and the most appropriately qualified individuals will be invited to continue in the selection process.

False statements may be cause for disqualification, removal from the eligible list, or discharge from employment. All statements made on applications are subject to investigation and verification.

To ensure your application is accurate and complete, please review the

Employment is contingent upon successful completion of OC San's pre-employment process, which includes a background investigation and a physical examination. For some positions, this may include a drug screen. False statements may be cause for disqualification, removal from the eligible list, or discharge from employment. All statements made on applications are subject to investigation and verification.

Reference Checks will be conducted by OC San to verify employment related information for all potential employees once a contingent job offer is made during the background investigation process. This is done to ensure that individuals who join OC San are well qualified and have a strong potential to be successful in their employment. The extent of the inquiry will depend on the position being applied for, but will at least include:

• Verification/Reference from current and past employers
• Confirmation of necessary licenses, certificates, and degrees.

Please have all necessary documentation ready. Additional inquiries may be necessary depending on the position for which you are applying. Human Resources will also schedule a post-offer physical examination once a job offer has been made.

OC San only accepts applications submitted via our online application system. Applications submitted via mail, fax or email will not be accepted.
The provisions of this announcement do not constitute an expressed or implied contract. Any provision contained in this announcement may be modified or revoked without notice.
Vacation leave; eleven paid holidays and one floating holiday; sick leave; administrative leave; group life insurance; group disability insurance; group health insurance (employee contribution required), dependent coverage available, including medical, dental, and vision; a retirement* plan (Orange County Employees Retirement System) and the option of participating in a deferred compensation plan as well as other optional benefits. A credit union is available. Telecommuting (up to two days) depending on nature of the work, business need, and management approval. Benefits are subject to the Board of Directors' periodic determination (usually annually) and the meet and confer process, and are therefore subject to change. OC San makes a generous contribution toward the cost of these benefits.

* New employees hired on or after January 1, 2013 will be subject to the retirement benefit formula and provisions set forth by the California Public Employees' Pension Reform Act of 2013 (PEPRA).

For more information on benefits, visit our website at
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PLEASE READ. The information provided on the Supplemental Questions will be used in conjunction with your job application to determine whether you meet the qualification requirements. Failure to provide detailed and complete information may result in your application being rejected. Do not submit a resume in place of completing these Supplemental Questions. Education obtained outside the United States must be comparable to education earned at an accredited school in the United States. We reserve the right to request further information about your academic program, evidence of comparability, or an original transcript. 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