JOSEPH GUILLEN
San Bernardino
Summary
Dynamic Corporate Security Officer with extensive experience at Stater Bros. Markets, excelling in criminal investigations and risk analysis. Proven track record in enhancing employee safety through effective threat assessments and legal collaboration. Strong leadership skills fostered improved incident response and investigative processes, ensuring a secure environment for all stakeholders.
Overview
19
19
years of professional experience
1
1
Certification
Work History
Corporate Security Officer
Stater Bros. Markets
San Bernardino
01.2019 - 02.2026
- Lead complex internal and external investigations involving threats, violence, and harassment
- Conducted comprehensive risk assessments to identify and mitigate organizational threats, enhancing overall security posture
- Collaborate with law enforcement agencies to support criminal investigations
- Enhanced coordination between corporate security and law enforcement
- Collected and analyzed video evidence, witness statements, and intelligence data to support investigations and improve case outcomes
- Prepare and present legal case files for restraining orders; represent company in court proceedings
- Successfully supported multiple restraining order cases, improving employee safety
- Strengthened investigative processes, improving case resolution efficiency
- Supported implementation and auditing of security technologies and systems to strengthen operational effectiveness and compliance
- Oversee security vendor contracts across Southern California locations
Business Owner / Federal Firearms Licensed Dealer & Gunsmith
San Bernardino
01.2009 - 01.2023
- Directed operations of federally licensed firearms business, ensuring seamless functionality
- Ensured legal and regulatory adherence in all transactions
- Maintained 100% compliance with regulatory requirements
- Ensured compliance with federal, state, and local regulations to uphold business integrity
- Streamlined recordkeeping for acquisitions, transfers, and repairs to enhance accuracy and accountability
- Built a reputation for accuracy and accountability in recordkeeping
Corporate Uniform Security – Watch Commander
Stater Bros. Markets
San Bernardino
01.2016 - 01.2019
- Supervised shift officers, enhancing daily operations and supporting sergeants
- Managed site access control and security operations, ensuring safety and compliance
- Enforced company policies and ensured regulatory compliance
- Responded to emergencies, criminal activity, and safety incidents
- Improved incident response coordination across shifts
- Conducted preliminary investigations, preparing detailed reports for escalation
- Strengthened reporting accuracy for investigative follow-up
Corporate Uniform Security Officer
Stater Bros. Markets
San Bernardino
01.2007 - 01.2016
- Monitored CCTV systems and controlled facility access to maintain a secure environment
- Secured corporate offices, distribution centers, and surrounding property to ensure safety
- Investigated and documented incidents, damages, and suspicious activity to support safety protocols
- Collaborated with law enforcement to enhance on-site security efforts
Education
Graduate Certificate - Industrial & Organizational Psychology
Grand Canyon University
Phoenix, AZ11-2024
Master of Science - Psychology
Grand Canyon University
Phoenix, AZ06-2016
Bachelor of Science - Criminal Justice
National University
San Bernardino, CA10-2005
General Education Studies -
San Bernardino Valley College
San Bernardino, CASkills
- Threat Assessment & Risk Analysis
- Workplace Violence Prevention
- Criminal & Internal Investigations
- Security Operations Management
- CCTV & Surveillance Systems
- Access control management
- Incident command
- Law Enforcement & Legal Collaboration
- Contract & Vendor Management
- Leadership & Team Supervision
- Case documentation
Certification
- Behavioral Threat Assessment – Preventing the Active Shooter, Joint Regional Intelligence Center (JRIC), 08/01/25
- Threat Evaluation and Reporting, Department of Homeland Security, In Progress
- Active Shooter Prevention: You Can Make a Difference, Emergency Management Institute (FEMA), 01/01/22
- Responding to an Active Shooter, Emergency Management Institute (FEMA), 01/01/22
- Basic Workplace Security Awareness, Emergency Management Institute (FEMA), 01/01/23
- Retail Security Awareness: Hidden Hazards, Emergency Management Institute (FEMA), 01/01/23
- Forensic Specialist / Advanced Crime Scene Investigations Academy, San Bernardino Valley College, 01/01/02
- P.O.S.T. Basic Police Academy, San Bernardino Valley College / San Bernardino County Sheriff’s Department, 01/01/97
Key Strengths And Differentiators
- Extensive experience bridging corporate security, law enforcement, and legal systems
- Advanced education in psychology and organizational behavior
- Proven ability to handle high-risk, sensitive investigations
- Strong leadership background with a focus on team development and operational excellence
Timeline
Corporate Security Officer
Stater Bros. Markets
01.2019 - 02.2026
Corporate Uniform Security – Watch Commander
Stater Bros. Markets
01.2016 - 01.2019
Business Owner / Federal Firearms Licensed Dealer & Gunsmith
01.2009 - 01.2023
Corporate Uniform Security Officer
Stater Bros. Markets
01.2007 - 01.2016
Graduate Certificate - Industrial & Organizational Psychology
Grand Canyon University
Master of Science - Psychology
Grand Canyon University
Bachelor of Science - Criminal Justice
National University
General Education Studies -
San Bernardino Valley College