Geotechnical Engineer

About Siegfried Siegfried is a multidisciplinary engineering firm with strong roots to California's Central Valley. Headquartered in Stockton, California, we provide civil engineering, structural engineering, landscape architecture, survey, and geotechnical engineering services for private and public sector clients. We are the selected and premier service provider on major healthcare and infrastructure projects in the area for all disciplines. Geotechnical laboratory services are performed in the Sacramento office.

We are seeking a highly motivated Geotechnical Engineer I or II to support our growing Geotechnical Department in our Stockton or Sacramento office.

What You’ll Do This is a hands‑on geotechnical engineering role for a doer who takes direct responsibility for field support, pre‑field exploration planning, data collection, testing coordination, analysis, and report preparation that support design and construction recommendations. The ideal candidate will produce high‑quality work, coordinate effectively with laboratory staff and the geotechnical team, and contribute directly to investigations and deliverables rather than primarily delegating tasks. This position reports to the Geotechnical Department Principal.

In general, the duties of this position consist of, but not limited to, the following tasks

Pre‑field exploration activities including permit procurement, preparing work plans, coordination with drilling/CPT/backhoe subconsultants, utility clearance with USA and coordination with private utility locators

During drilling operations, prepare boring logs and record N‑values, label and identify samples, classify soils per the USCS and rock per requirements, document drilling and excavation conditions, collect bulk, SPT, and mod Cal samples, and transport to the laboratory.

During CPT operations, observe penetration and collect data from the CPT vendor, determine locations for pore pressure dissipation tests and ensure the test achieves equilibrium conditions prior to terminating the test

During pavement coring projects, oversee core operations

Assign geotechnical laboratory testing appropriate for the conditions and application.

Perform geotechnical laboratory testing (i.e., index testing, strength testing, and volume testing) and analyze data for use in geotechnical design

Identify the generalized geotechnical profile and select geotechnical parameters for use in analysis and design

Laboratory Testing

Perform basic to intermediate geotechnical analyses (i.e., bearing capacity, settlement, flexible and rigid pavements, lateral earth pressures)

Prepare geotechnical reports that describe field explorations performed, site and subsurface soil and groundwater conditions, geologic and seismic hazards.

Identify undocumented fill and expansive soil conditions, soft, compressible soil, and material that would be susceptible to liquefaction

Prepare boring logs in geotechnical software, and plates and figures in AutoCAD/Civil3D

Perform field site visits and compaction/sand cone testing (as necessary).

Observe shallow and deep foundation excavations and installation

Observe ground improvement installation

Geotechnical Engineering

Experience in the geotechnical design of Commercial, Industrial, and Public Infrastructure Buildings using the California Building Code

Analysis and interpretation of laboratory test results

Proficient in the use of Microsoft Office products

Experience with one or more of the following is desirable, but not necessarily required for the position – cLiq, CPeT‑IT, Slope/W, Seep/W, Slide, RS Pile, LPile

An ability to professionally communicate with clients, technical staff, and management

What We’re Looking For

BS Civil Engineering with geotechnical engineering coursework preferred

A minimum of 0 to 5 years of geotechnical engineering experience

An ability to lift up to 30 lbs

Why Join Siegfried?

We believe that a healthy team is a strong team. That’s why Siegfried covers 100% of medical, dental, and vision premiums for employees and 50% for dependents.

Your growth is our priority. Siegfried supports employees in advancing their careers and developing as leaders within the organization.

We recognize the importance of work‑life balance. Starting vacation accrual is 15 days per year and enjoy 13 paid holidays.

We’re invested in your future. Siegfried offers a Personal Pension Plan with matching contributions.

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