Industry leaders
in subsurface

Welcome to Strata Earth Services, LLC. We are an industry leader in geotechnical and environmental subsurface exploration. Our experience in the field, combined with our extensive drilling resources, has enabled us to complete some of the most difficult drilling projects in the Midwest. Our highly experienced drill crews, and our excellent track record of quality and safety, have allowed us to work on many of the biggest projects in the Midwest, including much of the Chicago Skyline. Strata’s owner, Sara Knight, is a licensed Professional Engineer providing the technical experience and oversight that gives our clients an additional advantage over other service providers.

At Strata, regardless of the scope of the project or difficulty of the job, our goal is always the same - to provide the best possible information and services to our clients with safety as a priority. This makes us a valuable partner on any size project and helps motivate us to continue to be a leader in our field.


At Strata, we make safety our number one priority. In order to insure a safe working environment for both our employees and clients, extensive training is required for all staff. Strata maintains Three Rivers, e-Railsafe and 40-Hour Hazwoper trained crews. Our current EMR is 0.82.


Strata is compliant with all required DOT regulations. All drill crews are subject to random testing as part of a regulated DOT FRA drug and alcohol program. In addition to DOT regulations, Strata maintains an active account with the following compliance agencies: BROWZ, AVETTA (formerly PICS), ISN, and NCMS, as well as active O’Hare security clearance.



Strata maintains full insurance coverage including comprehensive liability, professional pollution liability, workman’s compensation and auto insurance.


Woman Business Enterprise (WBE) with Cook County - Illinois, Disadvantaged Business Enterprise (DBE) with the Illinois and Indiana Department of Transportation. EDWOSB and WOSB in SAM and prequalified for INDOT Drilling Services. DUNS 10-1264674 CAGE Code: 67S32 NAICS: 541330, 238910, 237990

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