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RJN Group

RJN Group

Downers Grove, IL

About RJN Group

RJN Group specializes in water and wastewater infrastructure engineering, with a focus on condition assessment, trenchless rehabilitation, and system optimization. Serving municipalities nationwide, RJN helps extend the life of underground systems through data-driven planning, innovative design, and hands-on project delivery.
Employees say this is a Best Firm To Work For

Company Culture at RJN Group

98.0% of employees at RJN Group say it is one of the Best Firms To Work For. Get your own empoloyee insights and benchmark your firm against the largest collection of employee sentiment data in the AEC industry.

Honors
2025 Winner
Best Firms To Work For
#18
Civil Engineering
2025
Best Firms To Work For
#16
100 to 199 Employees
News

RJN Group awarded design-build wastewater project

WHEATON, ILL. — RJN Group Inc. (RJN), headquartered in Wheaton, Ill., has recently been awarded a $1.3 million design-build project for the city of Collinsville, Ill. The project, designing and…

Jan 16, 2011 • Zweig List

RJN Group evaluates sewer lines for Virginia city

Flow isolation setup in Newport News, Va. WHEATON, ILL. — RJN Group Inc. (RJN) teamed up with AH Environmental to perform Night Flow Isolations in the city of Newport News,…

Jan 13, 2011 • Zweig List

RJN Group Inc. opens Memphis office

 WHEATON, IL — RJN Group Inc. expanded its Southern operations with the opening of a Memphis, Tenn., office to service clients in the area. The focus of RJN’s Memphis office…

Aug 17, 2011 • Zweig List

RJN selected for major WSSC Western Branch Project

Baltimore — RJN Group, Inc. announced a new contract with the Washington Suburban Sanitary Commission (WSSC) for the Western Branch Sewer Basin in Prince George’s County, Md.  The primary objectives…

Sep 5, 2016 • Zweig List

RJN to assist Buffalo Grove with MWRD compliance

Wheaton, Ill. — RJN Group, Inc. announced a new contract with the Village of Buffalo Grove, Ill., for professional engineering and specialty field services to help the village meet short-term…

Jan 30, 2017 • Zweig List

RJN Group celebrates 40 years of innovation

Wheaton, Ill. — Some anniversaries are a nod to surviving. Other anniversaries celebrate thriving. For 40 years, RJN Group, a national wastewater collection systems engineering firm located in the Chicago…

Nov 16, 2015 • Zweig List

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