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Associated Detectives & Security Agencies of Illinois, Inc.


ADSAI members foster and maintain good working relations with law enforcement organizations, the media and the business community.ADSAI develops and encourages the practice of high standards of personal and professional conduct among those persons serving in the investigative and security industry.

Founded in 1933
Incorporated on September 13, 1937

September 2016 Newsletter

October 2016 Newsletter

ADSAI Updated By Laws 2014 – as of November 11, 2015

Letter from Dick Lockhart 11.2015

 Associated Detectives & Security Agencies of Illinois

ADSAI Secretary
Ms. Bia Tyk
Tri-County Investigations
621 Plainfield Road, Suite 204
Willowbrook, Illinois 60527



The Mechanic Group is a leading private security insurance
program agent and investigator insurance program agent”

The Nimageational Council of Investigation and Security Services, Inc.Security Services, Inc., is a cooperative effort of those companies and associations responsible for providing private security and investigation services to the legal profession, business community,government and the public.

Member Since 1976



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