RJN Group, Inc.

RJN Group, Inc. Named a Best Firm to Work For, RJN Group is a specialty engineering and field data collection firm.

RJN Group is a nationwide, professional engineering and pipeline condition assessment firm, specializing in the delivery of practical solutions for water and wastewater collection and distribution systems. For over 40 years RJN Group has set the standard for providing efficient and innovative solutions to the complex issues associated with the operation and maintenance of underground infrastructure.

June may be National Safety Month, but every month is “safety month” at RJN. There is nothing more important than ensuri...
06/18/2026

June may be National Safety Month, but every month is “safety month” at RJN. There is nothing more important than ensuring everyone goes home at the end of each day.

A bear-sized "thank you" to everyone who visited RJN's sponsored snack table at the Michigan Water Environment Associati...
06/17/2026

A bear-sized "thank you" to everyone who visited RJN's sponsored snack table at the Michigan Water Environment Association's 101st Annual Conference! 🐻
We enjoyed connecting with industry professionals, sharing conversations, and celebrating 101 years of advancing the water environment profession.

At RJN, we know that better data leads to better decisions. Through flow monitoring, I/I investigations, and system asse...
06/17/2026

At RJN, we know that better data leads to better decisions. Through flow monitoring, I/I investigations, and system assessments, utilities can target the right improvements, reduce costs, and maximize infrastructure investments.

Learn how we can help you identify and quantify sources of I/I: https://hubs.li/Q04lDmD30

RJN's very own Zach Matyja, PE, is attending the MWEA's 101st Annual Conference in Boyne Mountain, starting today! He’s ...
06/15/2026

RJN's very own Zach Matyja, PE, is attending the MWEA's 101st Annual Conference in Boyne Mountain, starting today! He’s looking forward to connecting with water professionals from across the region, learning from industry leaders, and engaging in conversations that support stronger, smarter water infrastructure. 🌊

If you’ll be at the conference, be sure to say "hello" and catch up with Zach throughout the sessions and networking events. It’s a great opportunity to build connections and share ideas that move our industry forward. 🤝

06/12/2026

Who's the worst inflow/infiltration (I/I) offender?

In the comments, cast your vote on the most notorious I/I offender in stealing capacity.

Tune in next week to find out who's the worst of all perpetrators.

/I

06/11/2026

Accurate data starts with accurate flow monitoring.

Our team was recently in Lombard performing manual data confirmations to verify flow meter accuracy and ensure reliable flow data. These routine services help maintain high-performing flow monitoring networks, support informed decision-making, and maintain reliable infrastructure.

Wishing a warm welcome to our 2026 summer intern cohort! We cannot wait to watch these young professionals thrive and cr...
06/10/2026

Wishing a warm welcome to our 2026 summer intern cohort! We cannot wait to watch these young professionals thrive and create meaningful experiences as we advance the future of RJN.

Leave a comment with a piece of advice you have for our interns below!

A great day on the course at the APWA Chicago Metro Chapter Southwest Branch Golf Outing! ⛳Our team enjoyed the opportun...
06/09/2026

A great day on the course at the APWA Chicago Metro Chapter Southwest Branch Golf Outing! ⛳

Our team enjoyed the opportunity to connect with clients, colleagues, and industry partners while spending a beautiful day outdoors. Thanks to everyone who joined us for a fun and memorable event!

We're already looking forward to next year!

Address

2655 Warrenville Road, Suite 225
Downers Grove, IL
60515

Opening Hours

Monday 8am - 7pm
Tuesday 8am - 7pm
Wednesday 8am - 7pm
Thursday 8am - 7pm
Friday 8am - 7pm
Saturday 8am - 5pm

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