The Critical Difference™


Welcome to Critical Intervention Services

Since 1992, Critical Intervention Services (CIS) has assisted hundreds of clients in managing a diverse range of security risks.

In many cases, our mission is accomplishing through expert application of classic security and public safety measures. Our consultants regularly assist clients with matters such as security risk assessment, physical security design, emergency response planning, expert witness testimony, threat assessment, executive protection, and other services within the scope of well-established doctrine.

Although our team is well recognized for their expertise, knowledge is only one facet of our reputation.

Over the past three decades, CIS has earned unique recognition for achieving success in situations where traditional approaches to security and public safety have failed. When addressing complex and difficult security challenges, knowledge alone is often insufficient. Effective solutions often require an artful combination of expertise, holistic vision, and innovative mindset.

Over the years, CIS clients have provided us the opportunity to apply our talents to a diverse range of challenges—urban crime and social disorder, terrorism, school violence, and more. And we are honored that the unique risk management strategies produced from our experience have been endorsed as best practice standards by professional peers, news media, and academic researchers around the world.

Regardless of the complexity of the situation, effectiveness and excellence are the core principles founding our philosophy and approach to client needs. Although all consulting firms promise excellence, at Critical Intervention Services the pursuit of excellence isn’t just a pledge. It’s the lifeblood of our culture and the cornerstone of our success as proven for nearly thirty years.

Thank you for your interest in Critical Intervention Services. We are honored to serve you.

K.C. Poulin, cATO, CPO, CPS
President & CEO

Our Experts


K.C. Poulin, cATO, CPS

President & CEO

KC is an expert on community-based public safety, crime prevention, security officer operations, and managing risks of predatory aggression (e.g., workplace violence, stalking, etc.). KC is the lead architect of our community-based security and public safety programs and is co-author of two criminal justice textbooks. KC is a veteran expert witness and has provided decisive testimony in multiple premises liability cases.


Craig Gundry, PSP, cATO, CPS

VP, Special Projects

Craig is the Vice President of Special Projects for Critical Intervention Services and consultant with over 30-years of specialized focus on designing security programs for protection against acts of terrorism and mass violence. In addition, Craig is an expert witness and columnist for Workplace Violence Today magazine. As an instructor, Craig has trained over 5,000 security professionals globally im advanced security topics.


Jeff Ezell

VP, Operations

Jeff is the CIS VP of Operations, Guardian SafeSchool Program® consultant, and provides expert assistance to clients on matters related to security officer standards and deployment, control room operations, and patrol logistics. Jeff has over 30 years of experience in law enforcement, investigations, and security, and previously managed one of the most advanced private security operations in the United States.


Shannon Bryson, FCP

Public Safety Consultant

Shannon is an expert on premises liability, crime prevention, community policing, and special event security. As one of the architects of the CIS Private-Sector Led Public Safety Program, he directed the PSLPS program in Orlando for several years. Shannon joins CIS with over 25 years of experience as a DEA agent and tactical instructor.


Mario de Graaf, FCP

Security Consultant

Mario is a CIS consultant specializing in crime prevention and premises liability management in multi-family housing and residential communities. Prior to joining CIS, Mario was a security specialist for the Government of the Netherlands and responsible for the protection of Dutch diplomatic facilities around the world.


Patricia Schmitt, CPP

Security Consultant

Patty is CIS security consultant with more than three decades of expertise and experience in the security management community. During the span of her career, Patty has assisted a wide range of organizations in matters including risk and vulnerability assessment and developing strategies for improving the overall performance of existing security programs.

Specialized Solutions to Special Challenges

Beyond the conventional aspects of our work as consultants, CIS has earned a global reputation for designing and implementing comprehensive and effective solutions to difficult security and public safety challenges. Following are some of the unique and innovative programs pioneered by our creative team of security experts.

Recent News

Thanks to all who attended yesterday’s webinar, Facility Preparation & The Active Shooter Threat. We hope you got some useful information from …

On Tuesday, 18 May 2021, Critical Intervention Services and Workplace Violence Today magazine will host a free 90-minute webinar on facility security …

Thanks to all who attended the our recent Protecting Facilities Against Violent Intrusion webinar. We were delighted to by both the amazing …

On January 19, S2 had the honor of participating as speakers for United Women Singapore’s GenSafe Workplaces program. The one-hour program was …

Following the aftermath of the Capitol Hill riot, CIS provided expert commentary for a number of Florida news agencies on security failures …

ABC7’s Jacqueline Matter interviews CIS security consultant Craig Gundry about security failures at the U.S. Capitol during the January 6 riot and …

Expert Insights

The Words of Our Clients and Peers

Toll-free: (800) 247-6055 | Tampa Bay Area: (727) 461-9417 | Hillsborough: (813) 910-4247 | Orlando: (407) 420-7945

The staff of CIS is dedicated to providing each client with the finest quality of protective services available.

Our commitment and dedication to professional, ethical, and protocol conscious service is our trademark.

Preserving, projecting, and protecting our clients’ image and interests is our business.

Copyright © 2020 Critical Intervention Services, Inc. ® Florida “A” License: A9900261 • Florida “B” License: B9200107