NIS Consulting Group, Ltd. is a fully licensed and insured Detective Agency, providing prompt, thorough, and confidential services. Our investigative division has been successful in meeting the information and investigative needs of attorneys, insurance companies, corporations, industrial and commercial businesses, as well as the private individual.

Our goal is client satisfaction. We believe the key to this goal is personalized service and ongoing communication with the client. Each case we work is structured to the specific needs, goals, and time frame of the client. Clients are regularly advised of case activity, allowing them a better understanding of the cases development, as well as greater control over the direction of the investigation.

A proud member of the following Professional Associations:


Client Comments

I want to take this opportunity to tell you how pleased all of the ClearChannel Radio Stations in Chicago are with the protective, security and crowd control services your fine company has given us over the past few years.

ClearChannel Radio

We heavily rely upon NIS to assist our protective team in ensuring the safety and continuity of Microsoft’s highest executive echelons during their time in the greater Chicago area (and beyond the city).

Microsoft Global Security

NIS Consulting Group provided executive protection and escort detail to me at my first Annual Meeting as CEO. The fact that this protection occurred during a 60,000 person trade show at the Merchandise Mart was all the more commendable.

International Interior Design Association (IIDA)

I would like to thank you and your agency for your assistance over the summer. Your staff handled the executive protection of our performers with the utmost professionalism. They were thorough, courteous, and thoughtful. I look forward to working with you all again in the future.

Marketing Connections Group, Inc.

As you know, I was both relieved and comforted by the protection provided to my staff and me regarding the collection and transport of money. What’s more, after the event, many guests commented on how much they appreciated the security presence in the parking garage.

Friends of Battered Women and Their Children

I wanted to send this note of sincere appreciation for the professional services that you and your staff provided here at Tribune Tower and WGN-TV. From the days after September 11 up to the first weekend of this month, your staff provided quality security services as a supplement to my security staff.

Tribune Company