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Active Assailant

  • Multiple federal agencies recognize Threat Suppression as one of the United States’ leading providers of active Assailant Research and training


  • 200,000 people have attended threat Suppression training


  • Threat Suppression’s active Assailant training is the result of more than 50,000 hours of company research, 75 large-scale active shooter exercises, and response to multiple active shooter events

  • Threat Suppression is the primary provider of integrated active assailant training for the Department of Defense


200,000 People Trained on Five Continents

700 Major Conferences Presented Worldwide

Assisted More than 3,000 Agencies and Organizations

50,000 Hours of Active Assailant Research at Threat Suppression

Named the "Top 10 Military Training Company for 2022" by Aerospace and Defense Magazine

Primary Provider of Integrated Active Assailant Training for the Department of Defense

Our training is directly credited with thwarting 15 school shootings, five workplace shootings, and two church shootings. Our training is also credited with providing operational guidance at 10 active shooter events.



On behalf of the entire Threat Suppression team, I would like to cordially introduce you to our company! Threat Suppression was formed in 2012 when four people recognized the need for high quality safety and security consulting. Our team has more than 600 years' combined experience in public safety with response to more than a million emergency calls. 


From our inception, we have recruited extremely talented experts in the safety and security field. Our staff are incredibly accomplished individuals. I encourage you to check out their biographies by clicking here. I am deeply honored to work with each of these individuals. Our greatest company strength is – and always will be – our employees.


At Threat Suppression, we have committed our lives to keeping our communities safe. Our top priority is the safety and security of our clients and the individuals they serve. We are focused on finding innovative solutions to complex safety and security problems. We are also dedicated to leading research projects that will increase safety and security throughout the public safety industry.


Threat Suppression offers services from training the most elite military units in the world to assisting small businesses. No matter the service, our clients will always receive a high quality product specifically tailored to their unique needs. We continually strive to exceed our customer’s demanding expectations. As a testament to this, our company conducts no advertising. More than 95% of our contracts are from word-of-mouth recommendations. If I or any member of Threat Suppression can ever be of service, please do not hesitate to contact us by clicking on the CONTACT US link or my contact information below.

Respectfully, I Am, 

Mike Clumpner, PhD

Mike Clumpner, PhD, MBA, NREMT-P, SHRM-CP
President and Chief Executive Officer

1-800-231-9106 x 100

About Threat Suppression®

Threat Suppression is an internationally recognized leader in safety and security consulting. From North America to Asia and the Middle East, our staff have provided training throughout the world. The cornerstone of our company is the thousands of hours of scholastic research we conduct every year. All of our training programs are heavily researched, referenced, and cited. Our eight-hour course, Joint Public Safety Response to the Active Shooter/Active Assailant is the product of more than 50,000 hours of internal Threat Suppression research and cites more than 600 references. This course has gained international attention as the most comprehensive integrated active assailant response training course available. Because of the intensive research woven into our training and consulting, Threat Suppression has garnered a reputation as one of the premiere public safety training companies in the world. Not only are we active assailant researchers, we are also active assailant responders. Our personnel have responded and directly commanded several terrorist and active shooter events. 

At Threat Suppression, our passion is researching active assailant and terrorist events. Our company has provided training and consulting to some of the world's most elite counter-terrorism units. You can learn more about our history with active shooter research and training HERE. In addition to active shooter research, Threat Suppression staff have led large research projects on terrorism response, civil unrest response, fire-as-a-weapon response, house of worship safety, behavioral threat assessments, and more.

Threat Suppression is known worldwide for "first in class" training. We were the first company in the world to provide a practical course for law enforcement response to fire-as-a-weapon events (2014). We were the first company in the world to provide a course about integrated fire department response with civil unrest mobile field force teams (2014). We were the first company in the world to teach the tactical fire company program for fire units integrated with SWAT (2020). Not only are we known as "first in class", we are also widely recognized as "best in class". 

Threat Suppression staff have provided training in Europe, the Middle East, Asia, Australia, New Zealand, the Caribbean, and Latin America. Our staff are frequently requested to provide subject matter expertise to United States' government agencies and NATO allies. Our staff have served as expert witnesses for the United States' government in the prosecution of terrorism cases. On behalf of Threat Suppression, our staff have conducted interviews with ABC News, CBS News, CNN, Fox News, NBC News, the Los Angeles Times, the Washington Post, the New York Times, and the British Broadcasting Corporation. 

Many federal agencies depend on the expertise that Threat Suppression provides. Our largest client is the United States Department of Defense. Our company is the largest provider of integrated active shooter response training for the United States military, training more than 50 military installations in the United States and overseas. Our company has also provided services for the Department of Justice, Department of Homeland Security, the United States’ District Attorney’s Office, the Department of Education, and the Department of Energy. All of our federal contracts were awarded through sole-source, no competitive bids because of our unrivaled expertise. Although many companies are providing active shooter and counter-terrorism training, the real world experience and scholastic research sets Threat Suppression apart from the competition. At Threat Suppression, we perform no advertising of our services. As a testament to our abilities, all of our business comes from word-of-mouth recommendations from clients. We encourage you to learn more about our company HERE.


"As the mother of one of the most notorious school shooters, I will be forever grateful for the work that Threat Suppression has done to research and prevent further attacks."

- Sue Klebold

Mother of Dylan Klebold, one of two shooters at Columbine

Author, "A Mother's Reckoning"

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