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How many shims does it take to get to the inside of an access controlled door. The 1.2.3.4

  • Writer: Sean Ahrens
    Sean Ahrens
  • Sep 2, 2022
  • 0 min read

Updated: Mar 6, 2023



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SEAN A. AHRENS

Tel: 1 (833) 247-3677

Email: sean@ahrenssecurity.com

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ean Ahrens, a security consultant and expert witness based in Chicago, Illinois.

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Expert Witness Security Consulting in Chicago

SEAN A. AHRENS, MA, CPP, CSC, BSCP, FSyl, CHPA

Years in Practice: 23

  • General Specialties: Security Management

  • Contact me to see my CV 

Fields in specialization focus: Workplace violence, armed assailant active shooter, operations alarm, surveillance, crime prevention through environmental design, commercial, retail, and hospitality.

Working as a current security consultant, I have current knowledge regarding current threats, and vulnerabilities for a myriad of building types: parking garages, apartment buildings, warehouses, bars, restaurants, entertainment, office, workplace violence and security technology, operations, and architecture. 

My focus is on premise liability, negligence, wrongful hiring, foreseeability, crime demographic analysis, benchmarking, physical security, and security management.

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  • My education: I have a master's in organizational security management from Webster University, graduating with honors–Cum Laude. Before that, I did my bachelor's in criminal justice at Western Illinois University. I continue to obtain certifications that further substantiate my security lineage.

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