STO Investigations, Inc. - Oak Forest, IL - Security Services

STO Investigations, Inc.

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(708) 752-8804 Ext. 223 Call Email Email

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6006 159th Street, DOak Forest, IL 60452


Since 1998, we have been serving numerous Illinois businesses and attorneys with process service, legal investigations, uniformed security and retail loss prevention services. It has always been our goal to provide each customer with customized, individual detective and security services. We are currently updating our website so check back often to see our changes. Please feel free to contact us for a no obligation, free quote. We are confident that we will provide you with the service you.. expect.

Illinois Statewide Process Service, Security and Detective Services 866-426-3960

Professionally Licensed:

Illinois Licensed Investigations Agency: 117-001011

Illinois Licensed Security Agency: 122-000912


Business details

Guard & Patrol

  • Courier Services
  • Law Enforcement Experience
  • Patrols
  • Unarmed Guards
  • Uniformed Guards


  • Hotels
  • Retail


  • Investigations
  • Loss Prevention
  • Process Serving

Hours of Operation

  • MON
  • 9:00am
  • 5:00pm
  • TUE
  • 9:00am
  • 5:00pm
  • WED
  • 9:00am
  • 5:00pm
  • THU
  • 9:00am
  • 5:00pm
  • FRI
  • 9:00am
  • 5:00pm
  • SAT
  • SUN

* 24-Hour Service Available

Payments Accepted

  • Personal Checks

Year Established


Languages Spoken

  • English


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