Quality, Service & Commitment


  • 08 May 2018

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

  • 28 Apr 2018


  • 08 Dec 2017

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

More News


Laboratory Certifications

  • IL & WI State DOTs
  • ASTM


Firm Certifications

  • DBE with IDOT
  • MBE with City of Chicago

Read More


Tamiami Trail Project-Florida: “Mr. Vyas and the whole Interra team were instrumental in contributing to the high quality work provided to the USACE.  Interra’s management went above and beyond in meeting our needs.” Larry Corn, Area Quality Manager,  Kiewit Infrastructure …

Read More

INTERRA, Inc. Full-Time Field Technician Openings in 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 1 year of field experience with the State or on Private jobs with concrete & 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 remit resumes to:

Julia Slota
5004 W Ashland Way
Franklin, Wisconsin 53132
414-235-3170, Ex 3001

Back to News