Since Strata was founded in 2010, we have successfully completed over 1,700 subsurface explorations throughout the Midwest and surrounding states. Strata’s team is led by our president and owner, Sara E. Knight, PE, a registered professional engineer. Strata employs professional drillers that have been performing drilling explorations for over 30 years.

In addition to being a certified DBE and WBE, Strata is compliant with all required DOT regulations, include FRA and Browz, with extensive experience drilling for major railways including BNSF, CN, CP, UP, Metra, and Amtrak, as well as drilling within the right away for various CTA projects. Additionally, Strata has considerable experience drilling at airports including O’Hare International and Midway International Airports, in both secure and nonsecure locations .


Experience, Knowledge, & Capabilities

Sara Knight


Strata is owned and operated by Sara E. Knight, P.E. Sara is a registered professional engineer with a background in geotechnical engineering. Prior to starting Strata, Sara worked as a senior geotechnical engineer in the Chicagoland area and was responsible for project management and engineering aspects of projects including foundation studies, soil testing, slope stability, tunneling and retaining wall analysis. Various aspects of projects included up to four-level below-grade spaces, slurry walls, top of rock and rock-socketed caissons, caisson re-use, dewatering deep silt deposits, existing caisson and freight tunnel conflicts and backfilling. Ms. Knight is also an active member of the Rotary Club of Long Grove, ASCE, SAME and ADSC.

Strata Drillers


The Strata Drillers are some of the most experienced Drillers in the Midwest. They have successfully drilled on every type of job and in every condition that one would encounter in the region. Their reputation for industry leading quality and efficiency is what sets them apart. The ability for them to adapt quickly to changing conditions or client requests is what helps us to be a true partner with our clients. They have multiple safety and training certificates to help meet the diverse needs of the industry.

  • Local 150 Midwest Operating Engineers
  • 40 Hour HAZWOPPER
  • First Aid & CPR
  • Three Rivers Manufacturing Association Safety Training (TRMA)
  • E-Rail Safe
  • 10 and 30 Hour OSHA
  • MSHA

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