International Security, Incorporated - ISI - is a United States based company that specializes in:

• Security Consulting & Investigations
• Fraud & Special Investigation Unit Services
• International Strategies
• Crisis Management & Emergency Preparedness
• Integrated Security Systems
• Close Quarter Combat Training
• Counter Terrorist Training
• Urban & Guerrilla Warfare Training
• Higher Education Security
• Executive Screening Services & Leadership Training
• Combat Fantasy Adventures
• Vehicle Armoring & Armored Vans
• Architectural Building Security
• Kidnapping & Hostage Negotiations
• Business Intelligence
• Weapons Training
• Military Containers