The Metropolitan Water District of Southern California

Job Details

The Metropolitan Water District of Southern California is a consortium of twenty-six cities and water districts that provides drinking water to nearly 19 million people in Southern California. Metropolitan’s mission is to provide its service area with adequate and reliable supplies of high quality water to meet current and future needs in an environmentally and economically responsible way. Metropolitan’s facilities include the 242-mile Colorado River Aqueduct, five conventional water treatment plants with a combined capacity of 2.6 billion gallons per day, nine surface water reservoirs, 800 miles of pipeline, and 16 hydroelectric power plants. 
Metropolitan’s water is treated in California and distributed across 6 counties, providing nearly 19 million Californians with high quality water. Metropolitan's success is derived from our talented and diverse workforce whose efforts jointly drive the organization toward excellence. By joining our team, you will be faced with a challenging and exciting work environment. We offer excellent benefits. 

Job Summary


The Metropolitan Water Districts’ Construction Management Unit is currently seeking an Administrative Assistant I at our Diamond Valley Lake facility located in Winchester, CA. Please note that the person in this position will spend time working at various construction field offices within Metropolitan Water Treatment Plants, Distribution facilities, CRA Pumping Plants or temporary Right-of-Way areas adjacent to a construction project. These construction sites are dirty and dusty with access to the site being typically dirt and gravel roads. The construction field office is typically a temporary trailer with basic facilities.

The Administrative Assistant I classification is an entry-level position and involves performing a wide variety of administrative duties. The position works under close supervision and guidance, but is expected to exercise good judgment in conducting the position’s duties, determining appropriate work methods, and developing and recommending effective approaches to administrative tasks and issues. The position calls for an ability to handle multiple tasks concurrently; accept assignments from several individuals; work collaboratively, approach duties with positive people skills, work effectively within a construction office environment and sustain a teamwork mindset. 


1. Prepares letters, reports, and other documents from rough drafts; arranges material into proper format; and creates basic spreadsheets.

2. Answers inquiries; explains or clarifies rules, processes, and procedures; and provides information requiring general knowledge of institutional operations.

3. Extracts information from a variety of sources and compiles information for periodic or special reports.

4. Processes petty cash requisitions, prepares reimbursement reports, and monitors replenishment of funds.

5. Performs corporate credit card purchases and reconciliations, creates reports, and provides support to other card holders.

6. Maintains databases by entering information from a variety of source documents and determining actions necessary to obtain missing information or to correct information.

7. Files documents, records, and reports; develops, reconstructs, and/or purges files; indexes, locates, and updates records.

8. Orders, receives, and maintains office supplies.

9. May act as timekeeper and assists employees and managers with accurate timekeeping submission; reviews and verifies timekeeping entries.

Job Related Selection Criteria: 

5% Teamwork 

5% Customer Service 

10% Organization 

10% Oral Communication 

10% Written Communication

20% Job Preparation (Education, experience, and training relevant to the position) 

40% Technical knowledge/skills including knowledge of general office procedures, Microsoft Office Suite, report generation, telephone/front office etiquette  

Work Hours: Monday - Friday

Job Requirements


Education and Experience:  A high school diploma or High School Equivalency Certificate and four years of relevant experience; OR 

An Associate’s degree from an accredited college or university in a related field and two years of relevant experience; OR 

A Bachelor’s degree from an accredited college or university in a related field. 

Required knowledge of:  Administrative procedures and systems; methods and techniques of data collection, data organization and report preparation; and current office technology and equipment. 

Required Skills and Abilities to:  Make arithmetic computations with speed and accuracy; apply business policies and procedures; problem solve; prioritize and multi-task; communicate clearly and concisely, both verbally and in writing; establish and maintain effective working relationships with those contacted in the course of work; work independently and in a team environment; and operate current office equipment including computers and supporting applications. 

License: Valid California Class C Driver License or its equivalent in state of residency that allows you to drive in the course of your employment is required at time of application.

Physical demands: The work is sedentary. Typically, the employee may sit comfortably to do the work. However, there may be some walking; standing; bending; carrying of light items such as paper, books, or small parts; driving an automobile, etc. No special physical demands are required to perform the work. 

Work Environment:  The work environment involves everyday risks or discomforts that require normal safety precautions typical of such places as offices, construction field offices, meeting and training rooms, libraries, and residences or commercial vehicles, e.g., use of safe work practices with office equipment, avoidance of trips and falls, observance of fire regulations and traffic signals, etc. 



• Competitive compensation
• Excellent medical, dental, life, vision
• Retirement plans, including pension plan and 401k
• Tuition reimbursement
• Training and advancement opportunities
• Excellent working environment
• Public transportation reimbursements and van pools

For more information on MWD benefits, please use the following link:

This job announcement has been designed to indicate the general nature and level of work being performed by employees in this classification. It is not designed to contain or be interpreted as a comprehensive inventory of all duties, responsibilities and qualifications required of employees assigned to this job. To receive a copy of the complete job description, please send an email to

Metropolitan Water District of Southern California is committed to providing reasonable accommodations to qualified individuals with disabilities. Qualified individuals with disabilities, who need a reasonable accommodation during the application or selection process, please call (213) 217-7738 or email

MWD is a Federal and State EO employer - Veterans/Disabled and other protected categories.

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