GroundRoster
Home › Illinois › Joliet › Dennis Duffield

Dennis DuffieldLicensed

Licensed radon professional based in Joliet, Will County, IL

CompanyDuffield Consulting Engineers, Ltd.
License numberRNI2017203
License typeRadon Measurement Professional
License statusActive, IEMA-OHS licensed
Based inJoliet, Will County, Illinois

"Based in" is the city and county of the address on the business's license record. That can be a mailing address; it doesn't tell you where the business works.

Get free quotes

How to verify this license

We publish the license details exactly as they appear in the official licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up license #RNI2017203 directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.

Checked against IEMA-OHS radon license index, last checked 2026-11-02. See the issuing agency.

For the business owner: Own Dennis Duffield? Claim this listing

Compare radon professionals based in Joliet

All listings based in Joliet 3

Other radon professionals based in Joliet

Taylor CaireLicensed

Radon · Tester
Caire Inspection Group · Based in Joliet, IL · License #RNI20252958

Nicholas CaireLicensed

Radon · Tester
Caire Inspection Group · Based in Joliet, IL · License #RNI20253094

Other radon professionals based in Will County

Mike KokenesLicensed

Radon · Tester
Reliable Radon Inspections, Inc · Based in Plainfield, IL · License #RNIT2011209

Mark DoumaLicensed

Radon · Tester
Summit Ridge Inspection Group, LLC · Based in Manhattan, IL · License #RNI2019211

Barbara MartinLicensed

Radon · Tester
BJM Radon Testing, LLC · Based in Shorewood, IL · License #RNI2020214

Joshua CornLicensed

Radon · Tester
Precision Environmental Services · Based in New Lenox, IL · License #RNI20253285

Jose RoblesLicensed

Radon · Tester
Precision Environmental Services · Based in New Lenox, IL · License #RNIT20242877

See every listing based in Joliet.