Engineering Assistant I (#RE0111)
$29.66-$36.06 Hourly / $5,141.56-$6,249.60 Monthly / $61,698.76-$74,995.23 Yearly


Under general supervision, performs varied responsible field and office engineering work of average difficulty in the planning, design and construction of Public Works projects; and does related or other work as required in accordance with Rule 3, Section 3 of the Civil Service Rules.


This is the entry level in the Engineering Assistant series. Incumbents at this level are responsible for a variety of field and office engineering work requiring technical knowledge and skills. Incumbents are given assignments in Public Works projects, which include, but are not limited to transportation, drainage, water resources and supply, wastewater and solid waste and hazardous waste management. Initially assignments are routine, but as experience is gained, more responsibility for projects is assigned.


  • Performs drafting, computing, and checking of field operations as related to the layout and construction of roads; sanitation, drainage and water systems; subdivisions; bridges; traffic signals; street lighting systems; and solid and hazardous waste facilities.
  • Assists in the design of Public Works projects by preparing plans, profiles and cross sections; making quantity estimates, horizontal and vertical alignments and curve computations; and establishing highway and hydraulic gradients.
  • Prepares and reviews maps, right-of-way deeds and legal descriptions; calculates and plots the results of field surveys; and locates, sets or resets survey points.
  • Writes engineering specifications for proposed projects; makes estimates for projects planned or under construction; drafts engineering reports; assists in the application of principles of engineering design and theory to assigned projects.
  • May act as resident engineer for projects under contract such as roads; sanitation, drainage and water systems; buildings and other facilities.
  • May serve as a lead worker or supervise a field crew; may monitor field activities and work production; may instruct subordinate staff to make corrections or modifications to ensure compliance with standards and regulations.


Education: Completion of 60 semester units at an accredited college with major coursework in engineering science, construction management, or a related field.


Experience: Two years of varied engineering experience at a level comparable to a Senior Engineering Aide in San Joaquin County service.


Substitution #1: Additional experience may be substituted for the required education on a year-for-year basis.


Substitution #2: Additional education may be substituted for the required experience on a year-for year basis.



License: Possession of a valid California driver’s license.


Basic principles and practices of engineering and materials, including physics, mathematics, chemistry, drafting, real property description, surveying, design, construction, hydraulics and mechanics; basic computer and modern office automation technology, including pertinent software; principles of supervision.


Apply required engineering knowledge in varied work assignments; train and direct others; learn to perform a wide variety of computer applications; operate computers and related software; direct the work of others; establish and maintain effective working relationships with other employees and the public; communicate effectively, both orally and in writing.


Mobility-Frequent operation of a data entry device, sitting for extended periods, standing for long periods, walking, pushing/pulling, bending, squatting, driving, climbing stairs or other objects; occasional crawling; Lifting-Frequently 5-30 pounds or less; occasionally 30-70 pounds; occasionally restraining, lifting and/or turning heavy objects; Vision-Good overall vision, color perception, depth perception; frequent reading and close-up work; normal hand and eye coordination; good field of vision/peripheral;  Dexterity-Normal dexterity with frequent writing and repetitive motion; Hearing/Talking-Frequent hearing and talking on the telephone and in person; frequent exposure to construction and traffic noise; Special Requirements-May require occasional overtime, weekend or evening work; Emotional/Psychological-Frequent public contact and decision making; frequent concentration required; Environmental-May be exposed to dust, fumes, and varied weather conditions.

San Joaquin County complies with the Americans with Disabilities Act (ADA) and, upon request, will consider reasonable accommodations to enable individuals with disabilities to perform essential job functions.

CLASS: RE0111; EST: 12/12/1990; REV: 9/14/2005;