Private Investigators Private Detectives locations near Glen Ellyn, IL

Conrad Polygraphy & F L Hunter & Associates Inc

📍 930 York Rd, Hinsdale, IL, 60521

📞 630-920-0571

TRI County Investigations

📍 621 Plainfield Rd Suite 204 Ste 204, Willowbrook, IL, 60527

📞 630-655-1313

Tri County Investigations is a fully electronic office with a more extensive staff servicing the entire state of Illinois. We are committed to providing quick and efficient service of process and investigative tasks that you may require. We are able to receive, disperse and return documents via email, fax and/or USPS. We are available anytime of the day or night. You can be confident in knowing that we will apply every capability within our cutting edge resources to each document we are given. Combining the aforementioned means, along with the skills and perseverance of our knowledgeable staff, Tri County Investigations is able to fulfill all of your needs insuring that every service is performed to your satisfaction.

D H Delaney & Company

📍 Serving Your Area, Wheaton, IL, 60187

📞 630-480-9107

Potempa & Associates Private Investigators

📍 Serving Your Area, Bloomingdale, IL, 60108

📞 630-980-9805

Viper Detective Agency LTD

📍 158 Lakewoods Ct, Bloomingdale, IL, 60108

📞 630-307-7482

Spahn Breckinridge & Associates

📍 17w480 Lake St, Addison, IL, 60101

📞 630-941-0066

C A Fortune & Company

📍 141 Covington Dr, Bloomingdale, IL, 60108

📞 630-539-3109

Wicklander-Zulawski & Associates

📍 4932 Main St, Downers Grove, IL, 60515

📞 630-852-6800

🌐 w-z.com

Wicklander-Zulawski & Associates is a private investigative firm located in Downers Grove, Illinois. The company has an active online presence as of 2026, indicating ongoing engagement with clients. Those in need of investigative services can reach out to this firm for assistance in various matters.

BRI Mar Investigations

📍 1440 Maple Ave, Lisle, IL, 60532

📞 630-241-0160

Total Security Management Inc

📍 17w220 22nd St Ste 350, Oakbrook Terrace, IL, 60181

📞 630-832-1076