Engineer (Civil/Process Mechanical Design)

Salary: $148,928.00 - $181,043.20 Annually
Location : Orange County Sanitation District, CA
Job Type: Full-time
Job Number: 622
Department: Engineering
Division: Design
Opening Date: 09/14/2026
Closing Date: 10/12/2026 5:00 PM Pacific

Description
OC San is currently looking to fill the role of an Engineer (Civil/Process Mechanical Design).

Under direction, performs a variety of complex and responsible engineering duties in the planning, design, construction, operations, and compliance of wastewater facilities, infrastructure, systems, and programs; oversees development of engineering designs and provides project management of assigned programs and projects; inspects and analyzes plant operations and implements process improvements; enforces industrial wastewater discharge regulations and reviews, processes, and approves assigned permits; serves as a technical resource and advisor on assigned projects, programs, and systems; researches complex engineering issues and conducts engineering-related studies; and performs duties as assigned.

Job duties for the Engineer within the Design Division may include, but are not limited to:

Technical Leadership - Providing technical leadership and expertise during design and construction and being responsible for project work assigned; preparing memos, studies and reports for treatment plant and collection facilities; developing detailed drawings and technical specifications for complex projects; overseeing the design, replacement, rehabilitation, and abandonment of treatment plants, pump stations, and pipelines; participating in the development of requests for proposals and scopes of work, reviewing proposals, and selecting consulting engineers; technically overseeing and monitoring consultant's designs for compliance with the scope of work, engineering standards, design quality expectations, and stakeholder needs; participating in and leading design workshops and design constructability reviews; coordinating project requirements and impacts across departments and resolving conflicting stakeholder needs; inspecting, diagnosing, developing, and overseeing corrective action plans for complex operation and maintenance problems; serving as a liaison for the division with other District departments, divisions, and outside agencies; provides staff support to commissions, committees, and task forces; explains and interprets divisional programs, policies, and activities; and serving as a technical resource and advisor; and providing guidance and training to less experienced staff.

Construction Support - Assisting construction staff to ensure projects are constructed in compliance with contract documents; reviewing construction submittals for compliance with the technical specifications; developing recommendations to project problems and issues during construction; and providing technical training on the operation of new facilities or changes to existing facilities.

Quality and Engineering Standards - Ensuring that established engineering standards, policies and procedures, and engineering best practices are applied consistently; establishing, managing, and updating engineering policies, procedures, guidelines, standards, and technical specifications to meet current best practices and engineering design requirements while capturing lessons-learned from construction and operations/maintenance staff; attending and participating in professional group meetings to stay abreast of new trends and innovations; and researching emerging products and enhancements and their applicability to OC San needs.
Qualifications & Requirements

Requirements:

1. Bachelor's degree from a college or university accredited by the U.S. Department of Education, with major coursework in civil, mechanical, chemical, electrical, or environmental engineering, or a related field, dependent upon area of assignment.
2. Four (4) years of increasingly responsible professional engineering work experience.
3. Must possess a valid California Class C Driver's License.
4. Must possess a valid registration as a professional engineer (P.E.) in the State of California.

Desired:

• A strong background in civil/environmental engineering, methods of wastewater treatment, and odor control.
• Previous experience overseeing the design, replacement, rehabilitation, and abandonment of plant process areas to protect public health and the environment.
• Previous experience in collections system infrastructure/pipelines and pump stations.
• Previous experience with the design, replacement, rehabilitation, and abandonment of civil utility systems, wastewater collections system pipelines, and pump stations.
• A master's degree in civil/environmental engineering.

Recruitment & Selection Process
Vacancies: 1

(an eligible list may be established for future vacancies)
Apply online at:
APPLICATION FILING DEADLINE: Monday, October 12, 2026; 5:00 P.M.

(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 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.
• Perform 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 is needed 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.
• Climb ladders, install cabling, work around and in low voltage field control panels and hardware; use electrical and networking test equipment; use tools to remove, install and test equipment including servers, network equipment, power supplies, fiber optics and cabling.

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, 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 REQUIRMENTS

• 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 Orange County Sanitation District employees are designated Disaster Service Workers through state law (California Government Code Section 3100-3109). Employment with the Orange County Sanitation District 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.
Ten working days paid vacation after one year of service; eleven paid holidays and one floating holiday; sick leave; group life insurance; group disability insurance; group health insurance, dependent coverage available, including medical, dental, and vision, employee contribution is required; 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. Benefits are subject to the Board of Directors' periodic determination (usually annually) and the meet and confer process, and are therefore subject to change. The District makes a generous contribution toward the cost of these benefits.
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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 a