Commissioning Engineer Jobs in California

What do you value in your next job?

At the Orange County Sanitation District our Core Values form the framework of our organization and reinforce our professional work ethic. If the following values ring true with you, we'd love to invite you to explore our career opportunities further.

Integrity, Inclusion, Honesty, and Respect
We aspire to the highest degree of integrity, inclusion, honesty, and respect in our interaction with each other, our suppliers, our customers, and our community. We strive to demonstrate these values in our actions, commitments, and service.

Leadership, Teamwork, and Problem Solving
We lead by example, acknowledging the value of our resources and using them wisely to achieve our mission. We strive to reach OC San goals through cooperative efforts and collaboration with each other and our constituencies. We work to solve problems in a creative, cost-effective, and safe manner, and we acknowledge team and individual efforts.

Customer Service, Transparency, and Accountability
We are committed to acting in a timely, accurate, accessible, and transparent manner through excellent customer service. We are committed to act in the best interest of our internal and external stakeholders.

Resiliency, Innovation, and Learning
We continuously develop ourselves, enhancing our talents, skills, and abilities. We recognize that only through personal growth and development will we progress as an agency and as individuals.

Safety
We are committed to providing a safe work environment. We will demonstrate leadership, promote individual accountability, and participate actively in the advancement of our health and safety practices.

OC San is currently looking to fill the role of an Assistant Engineer (Commissioning).

Under direct supervision, performs a variety of engineering duties in support of the planning, design, construction, operations, and compliance of wastewater facilities, infrastructure, systems, operations, and programs; assists with the review and preparation of a variety of engineering drawings and designs and compliance and permitting documents; provides support for system management, treatment process performance and optimization including collections and treatment facilities; provides technical assistance to engineering and management staff; and performs duties as assigned.

This position works closely with other engineering disciplines, construction staff, Operations & Maintenance, consultants, and project stakeholders to ensure electrical systems, shutdown activities, and commissioning requirements are effectively integrated into project designs, specifications, and schedules. During construction, responsibilities may include coordination of electrical shutdowns, supporting commissioning activities, testing, documentation, system integration, reviewing shop drawings and coordination with the construction team and Operations & Maintenance.

Apply online at: www.ocsan.gov/careers

APPLICATION FILING DEADLINE: Thursday, December 3rd, 2026, 5:00 P.M. PST
(or until a sufficient number of qualified applications have been received)

• 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 35 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.
• May be required to perform some light physical work; lift, carry, push, and pull materials and objects averaging 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 to access, enter, and retrieve data using a computer keyboard or calculator and to operate standard office equipment.
• Frequent walking in operational areas to identify problems or hazards.

• 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, 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.

• 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.

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.

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

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.

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:

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.

* 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 https://www.ocsan.gov/about-us/jobs/employee-benefits