Engineering Testing Aid II

County of Los Angeles•Los Angeles, CA

12d•Onsite

About The Position

This position is with Los Angeles County Public Works, the largest municipal public works agency in the nation, employing over 4,000 individuals and offering over 500 different career opportunities. The County of Los Angeles is the largest employer in Southern California, with over 10 million residents and more than 39 diverse departments. This role is part of a continuous recruitment process, and applications will be accepted until the position is filled. The application filing period begins on Thursday, July 30, 2026, at 8:00 a.m. (PT). Out-of-class experience or holds will not be accepted, and required experience must be fully met and clearly indicated on the application at the time of filing.

Requirements

One year of experience in testing of soils, asphalt and concrete.
Completion of 15 semester units or 22.5 quarter units in engineering, physical science, mathematics, or public works (i.e., construction inspections; traffic control) from an accredited college or university.
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.

Responsibilities

Fills with a shovel, lifts onto a pickup truck, and transports bags of soil weighing approximately 90 pounds to the materials lab for analysis.
Lifts asphalt cores and core barrels, weighing approximately 40 pounds, for asphalt pavement laboratory testing, and conducts field sampling of soils for California Bearing Ratio tests.
Lifts and shifts the position of 40-pound loaded sieves in the prep room.
Digs holes 8 inches in diameter and 4 feet deep in firm, dense soil using a manual post-hole digger.
Prepares samples for testing by identifying, dating, separating, and logging information.
Tests soil samples for compaction, consolidation, moisture content, shear strength, specific gravity, composition, and bearing value.
Tests sand and rock samples for grading, abrasion resistance, specific gravity, sand equivalency, and plastic limits.
Tests paving liquid and emulsified asphalt samples for flash point, viscosity, heat loss, sieve retention, penetration, stripping, softening point, and residue by evaporation.
Tests asphalt and concrete mixtures for specific gravity, setting time, strength, oil content, and screen analysis.
Assists in performing the simpler phases of a wide variety of specialized materials tests.
Assists as a helper on a field crew operating test boring and sampling equipment.
Records test data, performs computations, and prepares report forms and graphs.
Operates testing machines and equipment to perform physical tests.
Performs cleanup and minor maintenance to keep the laboratory and testing equipment clean and in working condition.
Performs tensile tests on structural steel.
Performs other duties related to the physical testing of engineering construction materials, as needed.