About Us

From our Sr. Vice President & Chief Investigator, D & I Security, Inc.


Location: Chicago Area, Illinois


D & I Security, Inc., is a security and investigative firm founded on the principles of integrity, accountability, professionalism, and reliability. This basic ideal is fulfilled by the day-to-day involvement of management. We have been providing exceptional investigative services in the Chicago metropolitan area as well as around the country for almost 10 years.

We are a family-owned investigative firm and we employ ONLY exceptional people. Our clientele ranges from corporate headquarters to retail shopping centers to residential communities, private executive level details, and the man or woman next door.  As your Our Services and let us know how we can help. Simply give us a call at 800-966-3059 or fill out our Contact Form and we’ll get right back to you.


Our Specialties:

  • Private Investigation
  • Skip Tracing
  • Process Service
  • Surveillance


Give us a call anytime at 800-966-3059 and we’ll figure out exactly what you need.