Quality, Service & Commitment


  • 19 Sep 2018

    INTERRA Selected As Finalist To Receive The 2018 Illinois Sustainability Award

  • 08 May 2018

    IRTBA Announces INTERRA President To Serve On Green Council Board Of Directors

  • 28 Apr 2018


More News


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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Why INTERRA? Growth.  Opportunity.  Teamwork.  Integrity.  Support.

If all of these attributes in a company are important to you – along with excellent compensation packages that include competitive wages, family healthcare benefits, training, and matching retirement contributions, to name a few – then we encourage you to consider INTERRA for your next or first career move. INTERRA is a rapidly growing, multi-faceted company that provides challenging and growth oriented opportunities to experienced, client-focused engineering professionals and new graduates.  Because of ongoing demand from our highly valued clients, INTERRA continues to increase the scope of its expertise and the scope of the technical services it delivers in the fields of civil engineering design, materials inspection and testing, geotechnical studies, and environmental assessment and remediation. From each of our office locations in Illinois and Wisconsin we are always on the lookout for talented, committed, client-focused Project Managers, Project Engineers, Staff Engineers, and Field and Laboratory Engineering Technicians.  If we see that you are above the rest, we might even create an opportunity for you where none currently exists.

CORPORATE RESPONSIBILITY INTERRA believes in constructively engaging in community involvement and development efforts where it operates and encourages and supports its employees to actively participate.   INTERRA management and personnel strongly believe that “giving-back” to our local communities is both a privilege and a responsibility.

WORKFORCE DIVERSITY As an Equal Opportunity Employer (EOE), INTERRA has a highly diversified workforce and is the proud recipient of the Illinois Road and Transportation Builders Association’s “DIVERSITY AWARD.”


Full-Time Field Technician – Franklin, WI

INTERRA, Inc. is currently seeking full-time field technicians to perform Construction Materials Testing Services on WisDOT construction sites at our Franklin, WI office location. Responsibilities will consist of one or more of the following:

  • Field observation and testing during concrete placements
  • Sampling, inspection and testing of soils and aggregates
  • Laboratory testing of concrete cylinders, aggregates, and soils.

Qualified candidates must be detailed orientated and able to work independently as well as in a team environment. This position requires basic computer aptitude and effective written and oral communication skills. Candidates must also have a high school diploma or equivalent; possess a valid driver’s license (with a good driving record) and the ability frequently lift heavy objects weighing greater than 50 pounds on a daily basis. Some weekend and overtime work may be required.

The ideal candidate would have one or more of the following HTCP (WisDOT) certifications: PCCTEC-I, AGGTEC-I, CST, Grading Tech and/or NucDensity but we are willing to train qualified individuals. At least one year of field experience with the State or on Private jobs with concrete and soils material testing is desired. A personal vehicle/truck that can carry a wheelbarrow and equipment onto a construction site is a plus.

Pre-employment drug screening is required along with random and post-incidence drug screening specific to each project site. INTERRA, Inc. is an EEO employer.

Please submit resumes to: Julia Slota, 5004 W Ashland Way, Franklin, Wisconsin 53132, 414-235-3170, Ext. 3001, jslota@interraservices.com

Civil Engineer

INTERRA, Inc. is looking for a full-time Civil Engineer with a Bachelor’s degree and at least 5 years of experience in materials Quality Control (QC), Quality Assurance (QA), and construction inspection. Project roles can include, Independent Assurance and Verification of QC/QA materials program for various government agencies; materials coordination and construction inspection; perform field inspections to ensure compliance with project specifications and work with various Construction Management teams to ensure consistency and resolve materials related issues.

Required Skills and Experience At least 5 years of DOT related experience in roadway construction inspection and Materials QC/QA and related certifications.  IDOT QC/QA Certifications is a plus. Professional Engineer License preferred.  

INTERRA is an industry leading provider of Engineering, Inspection, and Material Testing services delivered in support of construction, development, and environmental projects throughout the Midwest. INTERRA is involved with several major, multi-year projects for IDOT and IL Tollway providing quality assurance, independent assurance, materials testing and construction inspection services.

INTERRA provides a competitive salary, paid Holidays and PTO, 401K with matching contributions, Major Medical and Dental Insurance, Professional Development, and a team of qualified, creative and talented people to work alongside.  Please submit your resume to jkmurphy@interraservices.com.