The HSI Special Response Team is the tactical unit inside Homeland Security Investigations that handles the enforcement actions considered too dangerous for regular plainclothes agents to run on their own. Roughly 20 teams operate out of ICE field offices around the country, staffed by about 300 full-time and collateral-duty operators who execute high-risk federal warrants, protect undercover agents and witnesses, and stand ready as a rapid reaction force for HSI operations.1U.S. Government Accountability Office. Federal Tactical Teams: Characteristics, Training, Deployments, and Inventory HSI is the principal investigative arm of U.S. Immigration and Customs Enforcement within the Department of Homeland Security.2U.S. Immigration and Customs Enforcement (ICE). HSI: Who We Are
What the Team Does
HSI enforces more than 400 federal statutes covering drug trafficking, human smuggling, financial crimes, cyberattacks, and terrorism-related offenses.3ICE. Fact Sheets Many of those cases close out with an arrest or search targeting someone armed, violent, or holed up in a fortified location. When a standard arrest plan involves that kind of threat, the tactical portion is handed off to SRT.
High-risk warrant service is the core mission. Beyond that, operators provide protective security for undercover agents during live buys, escort high-value witnesses, and guard sensitive evidence in transit. Between fiscal years 2015 and 2019, HSI SRT units logged over 1,700 deployments, with about 22 percent consisting of undercover support, evidence escorts, and protection details.1U.S. Government Accountability Office. Federal Tactical Teams: Characteristics, Training, Deployments, and Inventory
The teams also function as a rapid reaction force for barricaded subjects and hostage scenarios tied to HSI cases, and they help staff security at National Security Special Events such as presidential inaugurations, international summits, and the Super Bowl.4Federal Highway Administration. NSSE Overview Fact Sheet At those events, SRT works as one tactical element inside a layered security plan run by the U.S. Secret Service. Teams have occasionally deployed to support state, local, and federal partners during civil unrest and natural disasters as well.
How a Deployment Gets Authorized
Not every arrest calls for a tactical team. The SRT Handbook lays out a structured risk assessment that determines when the unit deploys. An ICE officer who thinks an enforcement action crosses into high-risk territory submits a completed Risk Analysis for Tactical Operations up the chain to the Tactical Supervisor at least 48 hours before the planned operation. Urgent circumstances can waive that window, but the default is to give the team time to plan.5U.S. Immigration and Customs Enforcement (ICE). Special Response Team Handbook
The risk analysis weighs the subject’s history of violence, substance abuse, mental stability, known weapons, military or tactical training, and criminal associations. A separate Pre-Entry Planning Worksheet covers the physical details: location layout, timing, communications plan, counter-surveillance concerns, medical emergency protocols, and post-arrest procedures. Operations with sensitive circumstances go up through the Office of Investigations director with at least 24 hours’ notice.
Only the Special Agent in Charge of a field office can authorize an SRT deployment. Every operation includes mandatory pre-mission and post-mission briefings for all participating personnel. That planning discipline is where SRT most departs from routine enforcement. A regular arrest team might work from a brief case summary. An SRT operation gets a full operational plan with contingencies, medical staging, and a defined command structure.
How the Teams Are Organized
HSI maintains 20 SRT units across ICE field offices. Together they include about 34 full-time tactical operators and 269 collateral-duty members.1U.S. Government Accountability Office. Federal Tactical Teams: Characteristics, Training, Deployments, and Inventory The collateral-duty model is the backbone. Most operators are HSI Special Agents who carry a full investigative caseload and maintain tactical readiness on top of it. Larger offices may keep a small full-time cadre, but even those agents usually retain some investigative work.
Each team reports to the local Special Agent in Charge, with day-to-day management handled by a Tactical Supervisor. Nationally, a National Tactical Coordinator sets standards, training protocols, and readiness benchmarks across all 20 units. Local Training Coordinators run recurring training at each field office and must hold a current National Firearms and Tactical Training Unit instructor certification.5U.S. Immigration and Customs Enforcement (ICE). Special Response Team Handbook
Specialized Roles
Operators cross-train but tend to concentrate in one of several roles. Entry team members handle close-quarters clearing and apprehension. Precision marksmen provide overwatch and cover from elevated or distant positions and complete extra marksmanship training beyond the standard SRT qualification. Tactical medics deliver emergency care during operations, trained in techniques adapted from the military’s Tactical Combat Casualty Care model.6Federal Law Enforcement Training Centers. Basic Tactical Medical Instructor Training Program Their job is keeping someone alive during the minutes between injury and evacuation, not replacing paramedic or hospital care.
Weapons and Vehicles
Operators carry ICE-authorized handguns and long guns configured under internal firearms policy. Teams also use breaching tools such as rams, halligan bars, and bolt cutters for forced entry.7U.S. Department of Homeland Security Science and Technology Directorate. Breaching and Breaking Tools Diversionary devices, chemical agents, and less-lethal munitions are available subject to ICE policy. For transport into and out of hostile environments, HSI SRT units use Lenco BearCat armored rescue vehicles, which come in variants configured for medical evacuation and bomb disposal. The specific models fielded at any given office aren’t publicly documented.
Use of Force and Oversight
Every SRT operation is governed by DHS Directive 044-05, the department-wide use of force policy issued in September 2018. The core standard is objective reasonableness under the Fourth Amendment as the Supreme Court defined it in Graham v. Connor. Operators must evaluate three factors before using force: the seriousness of the underlying offense, whether the subject poses an immediate threat, and whether the subject is actively resisting or fleeing.8U.S. Department of Homeland Security. Department Policy on the Use of Force
Deadly force is authorized only when an operator reasonably believes the subject poses an imminent threat of death or serious bodily injury. Shooting solely to prevent someone from running away is prohibited unless that person also poses a significant threat of deadly harm to others. Warning shots are banned. Firing at moving vehicles purely to disable them is banned, with narrow exceptions for certain maritime and aviation operations. When feasible, operators must identify themselves and give a verbal warning. Once resistance stops, force must stop.
All DHS components, including ICE, must train officers in de-escalation. For SRT, the risk analysis and pre-entry worksheet are designed partly to identify ways to resolve a situation with less force, not just to prepare for maximum force.
After-Action Review
ICE’s Office of Professional Responsibility conducts independent fact-finding reviews of all critical incidents, including any SRT operation where force is used. Those reviews go before the ICE Firearms and Use of Force Incident Review Committee for final action.9U.S. Immigration and Customs Enforcement (ICE). Office of Professional Responsibility Allegations of criminal or serious administrative misconduct are investigated by OPR field offices, while less serious issues get referred to management through ICE’s Management Inquiry program.
Becoming an Operator
SRT is staffed exclusively by HSI Special Agents, so the path starts with appointment as a criminal investigator at ICE. HSI agents enter at the GL-7 pay grade and advance through a career ladder to GS-13, with competitive opportunities beyond that to GS-14, GS-15, and the Senior Executive Service.10U.S. Immigration and Customs Enforcement (ICE). Criminal Investigator The handbook doesn’t set a minimum time in grade before applying, but candidates need enough experience and demonstrated judgment to survive a local selection process that weighs investigative performance and professionalism alongside physical ability. Team fit matters. Operators depend on each other in life-or-death situations, and a candidate who can’t mesh won’t make the cut regardless of physical numbers.
Firearms Qualification
Candidates must score at least 90 percent on the standard ICE firearms qualification course using both their authorized handgun and all ICE-standard long guns used by the team. The qualification is fired in full tactical gear.5U.S. Immigration and Customs Enforcement (ICE). Special Response Team Handbook The 90 percent threshold is not a one-time gate. Active operators re-qualify quarterly at the same standard, tested by a Senior Firearms Instructor who is not a member of the SRT.
Physical Fitness
The handbook requires an annual ICE SRT Physical Skills Test for all operators, separate from the standard hiring fitness test. The handbook states team members “must be capable of successfully completing a physical skills test at any time during the year,” not just on the scheduled test date. The specific events and minimum scores for the SRT Physical Skills Test are not detailed in the publicly available version of the handbook.
Basic SRT Course
Candidates who pass local selection become probationary members, sometimes called Green Team, and begin training with their local unit. Full membership is contingent on passing the basic SRT course conducted by the National Firearms and Tactical Training Unit on a pass/fail basis. The course covers close-quarters tactics, firearms proficiency under stress, operational planning, use of diversionary devices and chemical agents, and scenario-based practical exercises. Candidates who fail do not receive SRT certification.
Staying on the Team
Certification isn’t permanent. The handbook requires a minimum of eight hours of in-service training per month, designed and run by the Local Training Coordinator. Missing more than two consecutive scheduled sessions triggers a mandatory report to the National Tactical Coordinator, and the operator is placed on inactive status. Inactive operators are barred from high-risk enforcement operations until the deficiency is resolved.
The same consequence applies to failing the quarterly firearms qualification or the annual physical skills test. The Tactical Supervisor reviews firearms scores quarterly and fitness scores annually, and anyone below standard is pulled from tactical duty until they can demonstrate they’ve corrected the problem. For a collateral-duty agent juggling a full caseload with monthly SRT training, keeping certification takes serious ongoing effort. The eight-hour floor stacks on top of quarterly shoot qualifications, annual fitness testing, and whatever else the local team runs to stay sharp.
Each SAC must also complete a Risk Assessment Memorandum for Establishing and Maintaining Special Response Teams every three years, confirming that the field office’s SRT is justified by the local threat environment and adequately resourced. Teams that can’t show sustained operational need or struggle to hold minimum readiness face potential deactivation.