Senior Field Geotechnical Engineer

Location: Millersport, OH

Onsite Flexibility: Onsite

• Position Type: Contract
• Contract Duration: 6 months
• Pay Rate: $59.35–$77.03 / Hour (USD)
• Primary Focus: Aggregate pier and auger cast-in-place (ACIP) pile installation supervision, QA/QC, and home office and construction coordination
• Work Authorization: Applicants must be authorized to work for ANY employer in the U.S. We are unable to sponsor or take over sponsorship of an employment Visa at this time.

This position is dedicated to the Fairfield Energy Center
, a power generation facility in Fairfield County, Ohio, that includes gas turbine, reciprocating engine, compressor, tank, and balance-of-plant foundations supported on ground improvement and deep foundations. The client is seeking a Senior Field Geotechnical Engineer to lead on-site geotechnical supervision of aggregate pier and auger cast-in-place (ACIP) pile installation, including quality assurance and quality control of specialty contractor work and verification of load and integrity testing.

The position is part of the Geotechnical & Hydraulic Engineering Services (G&HES) group. The successful candidate will report to and receive technical supervision and functional oversight from the G&HES Group Supervisor / Geotechnical Engineering Manager or their designee, and will serve as the key link between the jobsite and the home-office geotechnical team, working closely with Construction, Field Engineering, CSA design, ES&H, the project management team, and specialty foundation subcontractors.

The role is site-based for an extended duration, with potential transition to another project or permanent office thereafter, and may require travel to other client and company offices within the U.S. Excellent verbal and written communication skills and a commitment to leadership, quality, and safety values are required.

This field-based role provides senior on-site geotechnical supervision for ground improvement and deep foundation construction. Specific duties include (but are not limited to):

• Serve as the senior on-site geotechnical representative for ground improvement and deep foundation installation, supervising specialty foundation subcontractors.
• Supervise installation of aggregate piers (aggregate piers and/or stone columns), verifying pier layout, diameter, length and termination depth, lift thickness, tamping/densification energy, aggregate gradation, and casing use where seepage or caving occurs.
• Witness and evaluate aggregate pier modulus (load) tests and uplift tests prior to production installation, compare results against design-build assumptions, and recommend adjustments to pier length or spacing by subsurface zone.
• Supervise auger cast-in-place (ACIP/CFA) pile installation, verifying pile layout, diameter, tip elevation, reinforcement placement, auger penetration and withdrawal rates, and grout pumping pressure.
• Review automated monitoring equipment (AME) records for each ACIP pile, comparing grout volume against theoretical volume, and identify under-volume, necking, or out-of-sequence installation for engineering disposition.
• Observe and document grout and concrete operations, including mix verification, flow/slump, temperature, and test specimen preparation, and track strength results.
• Oversee pile load testing programs (static compression, tension, and lateral) and non-destructive integrity testing such as Pile Integrity Testing (PIT), including verification of equipment calibration and preliminary review of results.
• Develop and implement the Inspection and Test Plans (ITPs) and hold points for aggregate pier and ACIP pile work, and verify subcontractor quality control (QC) records against project…