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Great Lakes Professional Investigations, LLC

(630) 400-3333
Great Lakes Professional Investigations, LLC

Great Lakes Professional Investigations, LLC provides investigative services to attorneys, businesses, and individuals throughout the Chicago area.

We conduct civil and criminal defense investigations in DuPage and Kane counties. Our professional investigators can assist individuals and attorneys with case review, locate and interview witnesses, uncover new evidence, and review law enforcement activity associated with the case.

We also offer an array of general investigative services including asset searches, bug sweeps, background and due diligence checks, computer forensics, service of process, public records and social media searches, and surveillance.


  • Asset Search
  • Background Checks
  • Bug Sweep / TSCM
  • Civil
  • Computer Forensics / Crime
  • Criminal
  • Due Diligence
  • Missing Persons
  • Process Service
  • Public Records
  • People Locate / Skip Trace
  • Social Media
  • Surveillance
  • Workers Compensation
  • Wrongful Death

Areas of Coverage

  • Cook County
  • DuPage County
  • Kane County
  • Lake County
  • McHenry County
  • Will County


  • IPA

Contact Info

Jacob Osojnak
(630) 400-3333
1212 South Naper Blvd., Suite 119, Box 256
Naperville, IL 60540

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Office Location

1212 South Naper Blvd., Suite 119, Box 256
Naperville, IL
(630) 400-3333

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