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 D & I Securityinvestigator, D & I believes that we become your partner in sharing a single goal—protecting your property, personnel, and information. As your partner, our primary focus is not to look for the most profitable way to solve a investigative problem – but to identify the most effective resolution with the best cost-efficiency and resources.

D & I Security, Inc., is also a full-service security company dedicated to serving clients with the highest standards of protective and preventive security and investigation services. Because we are locally owned and backed by experience, we can help you to rest assured with professional, licensed, and trained security personnel. Security & Investigation Specialists will assess your needs and deliver a comprehensive plan and appropriate resources to effectively manage your individual requirements.

We are staffed with a very diverse mix of investigators with unique skill sets and backgrounds including law enforcement, military, professionals, and techies. You will not see any of their names or pictures on this site as we take privacy very seriously – and you should too. Check out 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.