Quality, Service & Commitment


  • 22 Jan 2018

    Civil Engineer Needed

  • 08 Dec 2017

    INTERRA Honored With 2017 IRTBA Green Industry Achievement Award For Green Initiatives

  • 26 Oct 2017

    INTERRA To Host Ribbon Cutting With Bolingbrook Mayor Celebrating Going Green

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Laboratory Certifications

  • IL & WI State DOTs
  • ASTM


Firm Certifications

  • DBE with IDOT
  • MBE with City of Chicago

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With this letter we provide our confidence in INTERRA in providing comprehensive field and laboratory testing for projects involving soils investigations, design and construction monitoring … Their services are consistently ontime and within budget…

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Our Mission

INTERRA’s mission is to provide preeminent engineering, inspection, and testing services to clients in support of large-scale construction, development, and environmental/geotechnical projects throughout the Midwest.  We strive to achieve our mission by focusing on quality, technology, personnel experience and training, and technical qualifications and certifications.  Integral to this mission is INTERRA’s commitment to providing a safe, professional, rewarding and growth-oriented work environment to all its employees.

How We Meet Our Mission

INTERRA consistently delivers engineering expertise and practical solutions, quality inspections, and reliable, timely test results that our clients depend on because:

  • We invest in hiring and retaining some of the best talent in the industry.
  • Our rigorous inspection and field procedures help ensure that we achieve project goals and objectives.
  • We employ a company-wide technology backbone to drive quality and fast-track, reliable test results.
  • Our company culture is based on service with a goal of complete client satisfaction.

Evidence that we are working hard to achieve our mission can be seen from the following:

  • Our many long-term clients that utilize INTERRA’s diverse services and expertise.
  • Our ability to deliver laboratory test results in near real-time to facilitate quicker, more informed field decisions that help reduce overall project costs and time to completion.
  • The long-term stability and deep experience of our field inspectors and technicians helps ensure the consistent application of project standards and specifications during construction.