Mr. Charles McGilvary Johnson, PSP, FCP (Board Certified in Physical Security)
Office: 943-888-1749
Charles Johnson is a Board-Certified Physical Security Professional (PSP®) with more than 30 years of hands-on experience in the physical security industry. His unique combination of technical expertise, real-world operational insight, and executive-level leadership positions him as a highly credible, articulate, and effective expert witness for civil and criminal cases involving security technology, procedures, and industry standards.
As a Security Consultant serving clients nationwide, Charles brings deep proficiency across the full lifecycle of modern security systems, including capabilities, design, installation, programming, operation, maintenance, and potential points of failure or malfunction. This comprehensive understanding enables him to clearly explain how systems should perform, why they may fail, and whether industry best practices were followed.
One of Charles’s greatest strengths as an expert witness is his ability to translate complex technical issues into clear, accessible explanations. Judges, juries, and attorneys consistently benefit from his ability to break down intricate concepts, turning highly technical evidence into compelling, easy-to-understand testimony.
As the Founder & CEO of NGA Security Advisors, with offices in Georgia and Florida, Charles leads a team that conducts onsite vulnerability assessments and provides strategic guidance to clients seeking to enhance safety and security through technology. His background spans a wide range of environments, including:
• Corporate & Fortune 500
• Higher Education & K-12
• Healthcare
• Critical Infrastructure
• Multi-Family Housing
• Transportation
• Gaming & Casinos
• Entertainment Venues
• Federal, State & Local Government
• Law Enforcement & Public Safety
This diverse experience allows Charles to contextualize security issues across multiple sectors and to evaluate whether the measures in place were appropriate, reasonable, and compliant with expected standards.
He is a member of IAPSC (International Association of Professional Security Consultants), ASIS (American Society for Industrial Security), SIA (Security Industry Association) & US CPTED. His current Certificates include PSP (Physical Security Professional) from ASIS & FCP (Florida CPTED Practitioner) from State of Florida Office of Attorney General - Florida Crime Prevention Training Institute.
As an Expert Witness Charles provides Case Review, Research, On-Site Assessment, Consultation on Security Standards & Best Practices, Oral & Written Opinion, Sworn Deposition, Coaching Retaining Counsel and Testimony in claims/lawsuits involving Negligent Security, Premises Liability, Personal Injury and Physical Security Technology such as Physical Access Control, Video Surveillance, Biometrics, AI, IoT, Vehicle Entrance, Pedestrian Entrance, Exterior Barriers, Fire, Burglar & Sprinkler Alarms.
In addition, Charles is an expert on the Florida Tort Reform Bill / Florida House Bill 837 / Florida Statute 768.0706 that was signed into law in March 2023 providing a “Presumption Against Liability” for multi-family property owners/management companies against premises liability/personal injury claims/lawsuits. Charles is very adept at educating others on the initial and ongoing compliance requirements including CPTED Assessment, security improvements and employee education. He earned the requisite FCP (Florida CPTED Practitioner) designation in December 2024, which was granted by the State of Florida Office of Attorney General. He is also a member of US CPTED and is dedicated to educating others on the substantial Crime Prevention benefits of incorporating CPTED in a building's environmental design.
In conclusion, attorneys who retain Charles gain a knowledgeable, credible, and articulate expert who brings clarity to complex matters, strengthens case narratives, and provides testimony grounded in decades of industry practice and recognized board-certified expertise.
- Alarms
- Apartment/Condominium Security
- Casino & Gaming Industry
- Crime Foreseeability
- Homeowners Association
- Inadequate/Negligent Security
- Premises Liability
- Security Guards
- Security Management
- Surveillance
- Q: Please list your professional accreditations, degrees, licenses, and certificates granted:
- A: ASIS - Physical Security Professional (PSP)
State of Florida Officer of Attorney General - Florida Crime Prevention Training Institute - Florida CPTED Practitioner (FCP)
NGA Security Advisors is a SDVOSB - Service-Connected Disabled Veteran Owned Small Business - Q: Please list your affiliations or memberships in any professional and/or industry organizations:
- A: IAPSC - International Association of Professional Security Consultants
SIA - Security Industry Association
ASIS - American Society for Industrial Security
US CPTED - Crime Prevention Through Environmental Design - Q: Please list any teaching or speaking experience you have had, including subject matter:
- A: ISC - East, New York, NY (2025)
Moderator - Go-To-Market Strategies for Start-Ups
GSX, New Orleans, LA (2025)
Panelists “Taking the Leap, Starting your Entrepreneur Journey as a Security Consultant”
CONSULT, Denver, CO (2025)
Moderator “Access Control for Remote Locations”
The Security Connection Podcast (2025)
Discussion about CPTED and the Florida Statute 768.0706
49 Volts Episode 18 Podcast (2025)
CPTED Explained: Crime Prevention Through Environmental Design
ACS2025, San Sebastian, Spain (2025)
Panelists “The Mirage of Consensus: Why Industry Standards Are Both Inevitable & Impossible”
- Q: Have any of your accreditations ever been investigated, suspended or removed? (if yes, explain)
- A: No - All Clear
- Q: On how many occasions have you been retained as an expert?
- A: Please contact Charles directly for current biographical details
- Q: For what area(s) of expertise have you been retained as an expert?
- A: Please contact Charles directly for current biographical details
- Q: In what percentage of your cases were you retained by the plaintiff?
- A: Please contact Charles directly for current biographical details
- Q: In what percentage of your cases were you retained by the defendant?
- A: Please contact Charles directly for current biographical details
- Q: On how many occasions have you had your deposition taken?
- A: Please contact Charles directly for current biographical details
- Q: When was the last time you had your deposition taken?
- A: Please contact Charles directly for current biographical details
- Q: On how many occasions have you been qualified by a court to give expert testimony?
- A: Please contact Charles directly for current biographical details
- Q: On how many occasions have you testified as an expert in court or before an arbitrator?
- A: Please contact Charles directly for current biographical details
- Q: For how many years have you worked with the legal industry as an expert?
- A: Please contact Charles directly for current biographical details
- Q: What services do you offer? (E.g.: consulting, testing, reports, site inspections etc.)
- A: Case Review & Research
Investigation & On-Site Assessment
Oral Opinion
Drafting a Case Report
Sworn Deposition
Assist Retaining Counsel
Testify at Trial - Q: What is your hourly rate to consult with an attorney?
- A: Please contact Charles directly for a fee schedule
- Q: What is your hourly rate to review documents?
- A: Please contact Charles directly for a fee schedule
- Q: What is your hourly rate to provide deposition testimony?
- A: Please contact Charles directly for a fee schedule
- Q: What is your hourly rate to provide testimony at trial?
- A: Please contact Charles directly for a fee schedule
- Q: Please list any fees other than those stated above (E.g.: travel expenses, copy fees, etc.)
- A: Please contact Charles directly for a fee schedule
Available Upon Request