Engineering Testing AID III

Posting number: C3856R

Department: PUBLIC WORKS

Job classification: ENGINEERING TESTING AID III

Posting type: Open

Categories: Engineering, Public Works, Trades

EXAM NUMBER C3856R

FILING PERIOD The application filing period will begin on Monday, August 17, 2026, at 8:00 a.m. (PT) — Continuous. We will keep accepting applications until the position is filled. The application window may close unexpectedly once we have enough qualified candidates.

TYPE OF RECRUITMENT We welcome applications from anyone.

• Fills, lifts, and transports bags of soil, weighing approximately 90 pounds, to the materials lab for analysis.
• Carries PCC (Portland Cement Concrete) cylinders, weighing approximately 30 pounds, to conduct density tests and concrete cylinder strength tests.
• Digs holes 8 inches in diameter and 4 feet deep in firm, dense soil using a manual post-hole digger.
• Performs specialized physical laboratory tests on soils, steel and concrete products, cement, aggregates, asphalts, bituminous mixes, and other engineering construction materials.
• Operates standard testing machines and equipment used in laboratory testing of engineering construction materials.
• Assists in developing new test procedures and modifying and building test apparatus.
• Tests asphalt concrete mixes for design and analysis purposes.
• Performs all calculations required for laboratory and field tests.
• Operates testing and sampling equipment in both the laboratory and the field.
• Performs tensile tests on structural steel.
• Performs complex physical tests on paints and epoxies.
• Performs other duties related to the physical laboratory and field testing of engineering construction materials, as needed.

For more information, please view the classification specification: Engineering Testing Aid III

OPTION I: Two years' experience at the level of Engineering Testing Aid II*.

OPTION II:60 semester units or 90 quarter units in an accredited college or university with specialization in engineering or a physical science. Applicants may substitute experience for education. Every 18 months of experience conducting physical tests on engineering construction materials may be substituted for 30 semester units or 45 quarter units.

LICENSE: A valid California Class C Driver License or the ability to utilize an alternative method of transportation when needed to carry out job-related essential functions.

PHYSICAL CLASS: Physical Class 4 – Arduous: This class involves frequent heavy lifting over 25 pounds, often combined with bending, twisting, or working above ground on irregular surfaces. It includes those positions that occasionally demand extraordinary physical activity such as those in Safety positions.

SPECIAL REQUIREMENT INFORMATION: *Experience at the level of the County of Los Angeles class of Engineering Testing Aid II is defined as performing standardized physical tests on various engineering construction materials. For a fuller description of work performed refer to County of Los Angeles Class Specifications for Engineering Testing Aid II.

You may still qualify even if your job title is not exactly the same as the one listed. What matters is that your experience is at a similar level — meaning your job involves similar responsibilities, requires comparable skills and knowledge, and takes place within a similar organizational structure. Please provide a clear explanation of your experience to demonstrate that it is at the appropriate level.

To receive credit for your education, include a legible copy of all relevant official documents, including your transcript from an accredited institution or email it to within five (5) calendar days of application submission. When emailing, please indicate your name, the exam name, and the exam number., semester, quarter) and be in English. If not in English, then translation is required.S. standards and indicate the number of units and unit system. Documents marked as unofficial will not be accepted.

• Note:A printout of a transcript from the school’s website is not considered official and will not be accepted. Submitting an unofficial document will result in your application being deemed incomplete and rejected.
• We do not accept password-protected documents.Ensure documents are unlocked before attaching to your application or sending to the exam analyst.
• Physical science encompasses any of the sciences, such as physics, chemistry, astronomy, geology, and earth science, that analyze the nature and properties of energy and nonliving matter.

With almost 10 million residents, Los Angeles County is the population county in the nation! As the largest employer in Southern California, with over 100,000 employees in 39 departments and over 2,100 different job descriptions, Los Angeles County offers a lifetime of opportunities and careers. We are Los Angeles County Public Works, the largest municipal public works agency in the nation. With more than 4,000 employees, Public Works offers over 500 different types of career opportunities that promote professional and personal growth as well as a rewarding and exciting work environment!

For more information about the outstanding benefits offered by Los Angeles County, please visit us here: .

If you have questions about working for Los Angeles County, including current open recruitments, tips on crafting a resume or acing an interview, career planning, or any other general information, please visit our website at: .

ENDORSEMENTOF COUNTY QUALIFICATIONS: If you performed work that differs from the duties described in your class specification and you believe qualifies you for this opportunity, please describe the out-of-class duties in detail in the Work Experience and Supplemental Questions sections of your application.

WITHHOLD INFORMATION: No withhold will be allowed. Required experience/education must be fully met at the time of filing, and clearly indicated on the application.

Once we have identified that you meet our requirements, an invitation regarding the following assessment process will be sent:

This examination consists of a Multiple-Choice and Simulation Assessment, weighted at 100%, measuring:

• Achievement
• Professional Potential
• Responsibility
• Teamwork
• Reading Comprehension
• Numerical Calculation

Candidates must achieve a score of 70% or higher in order to be placed on the eligible register.

STANDARDIZED MULTIPLE-CHOICE TESTS ARE NOT REVIEWABLE BY CANDIDATES PER CIVIL SERVICE RULE 7.19. Notice of Non-Acceptance and Final Result letters will be sent electronically to your email address. Test scores cannot be given over the telephone.

TESTING ACCOMMODATION: If you require an accommodation to fairly compete in any part of the assessment process, you will be given the opportunity to make a request when completing your application. Please note, you may be required to submit documentation from a qualified medical provider or other qualified professional to support your request for a testing accommodation.

If you have taken identical components recently for other exams, your responses may be automatically transferred to this examination. This exam contains test components that might be used on future exams, and your responses could be transferred to that exam.

We provide study guides and other test preparation resources to help candidates prepare for employment tests. While the guides may help in preparing for the test, we recommend reviewing all related materials that seem necessary.

• Various information can be found on our website at . The section dedicated to test preparation is "Employment Test Assistance."
• Online practice tests are available at .
• You can also visit our Los Angeles County Online Assessment Preparation Series webpage at for information about common online assessment types, sample questions, and test-taking tips.

ELIGIBILITY AND VACANCY INFORMATION: Applicants who passed the assessment are placed on a list in the order of their score group for a period of twelve (12) months. Applications will be processed as they are received and added to the list accordingly. We will use this list to fill vacancies in Public Works as they occur.

S. mail, fax, or in person are not accepted. This website can also be used to get application status updates.

Please fill out the application completely. Provide relevant job experience including employer's name and address, job title, beginning and ending dates, number of hours worked per week, and description of work performed.

We may verify information included in the application at any point during the examination and hiring process, including after an appointment has been made. Falsification of information could result in refusal of application or rescission of appointment. Copying verbiage from the Requirements or class specification as your work experience will not be sufficient to demonstrate meeting the requirements. Doing so may result in an incomplete application and may lead to disqualification.

We will send notifications to the email address provided on the application, so it is important that you provide a valid email address. If you choose to unsubscribe or opt out from receiving our emails, it is possible to view notices by logging into and checking the profile inbox. It is every applicant's responsibility to take steps to view correspondence, and we will not consider claims of missing notices to be a valid reason for re-scheduling an exam part. Register the below domains as approved senders to prevent email notifications from being filtered as spam/junk mail.

New email addresses need to be verified. This only needs to be done once per email address and can be done at any time by logging in to and following the prompts. This is to improve the security of the online application and to prevent incorrectly entered email addresses.

SOCIAL SECURITY NUMBER:Federal law requires that all employed persons have a Social Security Number, so include yours when applying.

COMPUTER AND INTERNET ACCESS AT PUBLIC LIBRARIES:For candidates who may not have regular access to a computer or the internet, applications can be completed on computers at public libraries throughout Los Angeles County.

NO SHARING USER ID, EMAIL AND PASSWORD:All applicants must file their application using their own user ID and password. Using a family member or friend’s user ID and password may erase a candidate’s original application record.

ANTI-RACISM, DIVERSITY, AND INCLUSION (ARDI):The County of Los Angeles recognizes and affirms that all people are created equal and are entitled to all rights afforded by the Constitution of the United States. We are committed to promoting Anti-racism, Diversity, and Inclusion efforts to address the inequalities and disparities amongst race. We support the ARDI Strategic Plan and its goals by improving equality, diversity, and inclusion in recruitment, selection, and employment practices.

CONTACT INFORMATION:Department Contact Name:Mayra Fuentes Department Contact Phone: Department Contact Email: ADA Coordinator Phone: Teletype Phone: California Relay Services: