D & I Security, Inc.


Investigations – Process Service – Skip Tracing


Criminal, Insurance, Domestic, Civil, Accidents, Surveillance, Financial, Child Support, and much more.

Background Checks

State and National Criminal, Pre-Marital, Nanny, Financial, Address History, and more. Private and Discreet.

Process Service

We serve all legal documents including subpoenas, complaints, and summonses. Attorney services, document retrieval, etc.

Security Division

Access Control, Armed Escorts, Crowd Control, Armed Alarm Response, and much, much more.

Skip Tracing

We’ll locate your Subject. Our clients include Attorneys, Collection Agencies, Process Servers, and Bail Bondsmen.

Contact Us

Call Us Now at 800-966-3059 or simply let us know how we can help you by filling out our Contact Form.

D & I Security and Security & Investigation Specialists

D & I Security, Inc., is a Security & Private Investigation 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 over 10 years.

We specialize in Private Investigations, Process Service, and Skip Tracing. D & I Security are the Security & Investigation Specialists – available to take care of all your needs. We’ll develop a plan and method of operation tailor made to your every need. Call us any time at 800-966-3059.

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 investigator, 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. Nothing but the best.

Call or Contact Us Today For a Free Quote 800-966-3059

The Latest From Our Blog

Find Property Owners

There’s a number of reasons why you might wish to find property owners. You may be an investor – or there might come a time when you need to check on someone’s assets. How about that nasty neighbor down the street?  Many of our clients are involved in the purchasing...

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Background Checks

If you have a legitimate need to perform a background check on someone - perhaps a neighbor, teacher, or relative, then we can help. We will verify their true identity, their age, and verify their SSN. We will also provide up to 30 years of address history, phone...

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Phone Traces

  Phone Traces have changed dramatically in the last few years. Portability, burners, tracfones, cheap pre-paid phones and phone service, etc. Many people no longer have a land line. Cell phone plans are getting so inexpensive, that many people simple obtain a...

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What is Process Service

What is Process Service? You can get the Wiki definition here. Here at D & I Security, that's one of our specialties. Call us today at 800-966-3059 or shoot us an email here.  Or, fill out our Contact Form. We’ll discuss your situation and beat the best price...

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Skip Tracing

What is Skip Tracing?  Wikipedia defines it here. Basically, the art of "finding someone." It's not easy, but a qualified Private Investigator can get the job done. That's where we come in - call us at 800-966-3059. Or, fill out our Contact Form and we'll get right...

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