The Department of Homeland Security (DHS) Joint Emergency Training (JET) program provides realistic, scenario-based training for federal, state, local, tribal, and private sector partners to build coordinated response capabilities for large-scale emergencies and disasters. JET supports national preparedness objectives by delivering joint exercises that emphasize interoperability, public safety, critical infrastructure protection, and community resilience in complex, high-consequence scenarios. This overview explains how JET fits into the broader DHS portfolio, the exercise cycle, core capabilities practiced, participant roles, and how the program maintains relevance to evolving threats and lessons learned.
What DHS JET is and why it matters
DHS JET is a collaborative training initiative that brings together multiple jurisdictions and agencies under realistic conditions to test and refine emergency plans, decision-making processes, and communication systems. By replicating high-impact events such as natural disasters, public health incidents, and complex terrorist scenarios, JET helps identify gaps, align protocols, and build trust among organizations that must work together during crises. The program emphasizes measurable objectives, after-action reviews, and continuous improvement so that responders and planners can execute more effective, coordinated responses when real incidents occur.
Context within the Department of Homeland Security
Within DHS, JET supports overarching mission areas that include protecting critical infrastructure, safeguarding communities from terrorism and targeted violence, strengthening border and immigration security, enhancing cybersecurity, and improving disaster response and recovery. Training activities like JET translate national strategy into operational practice, bridging policy, doctrine, and on-the-ground capabilities. Because DHS responsibilities span prevention, protection, mitigation, response, and recovery, JET exercises often integrate multiple functional areas, enabling participants to practice coordinated decision-making across jurisdictional and agency boundaries.
DHS mission alignment and preparedness priorities
JET exercises align with DHS preparedness priorities such as public safety, critical infrastructure resilience, continuity of operations, and equitable community protection. These priorities reflect long-term national goals to reduce loss of life, stabilize essential services, and restore functions after disruptive events. By focusing on realistic, high-consequence scenarios, JET helps ensure that participants understand how their roles contribute to broader outcomes like rapid stabilization, effective public communication, and coordinated resource deployment.
Key capabilities and objectives of JET
JET programs typically focus on building and assessing core capabilities defined by national frameworks, including planning, public information and warning, operational coordination, logistics management, and continuity of government and essential services. Exercises may evaluate command and control, resource positioning, medical surge capacity, evacuation procedures, and cross-jurisdictional communication. Objectives are often tied to validated capability gaps, lessons from after-action reports, and emerging risks, ensuring that training remains relevant to current and future threats.
Planning and evaluation objectives
- Test and validate emergency operations plans, incident command structures, and communication systems under stress.
- Identify misalignments between plans and on-the-ground execution, then track corrective actions over time.
- Measure coordination effectiveness among participating organizations, including information sharing and resource requests.
- Build standardized after-action review processes that produce measurable improvement objectives.
JET exercise cycle and design principles
Effective JET programs follow a structured exercise cycle that includes scoping and goal setting, scenario development, tabletop discussions, functional drills, and full-scale activities, followed by rigorous after-action reviews and corrective action tracking. Designers use validated scenarios that reflect plausible threats, incorporate injects to simulate evolving conditions, and include evaluators observing performance against established objectives. This cycle supports iterative improvements, ensuring that findings from one exercise inform the design of the next and that progress is measurable across time.
Exercise design and injects
Scenarios are built around credible threat vectors, such as hurricanes, earthquakes, industrial accidents, or public health emergencies, and may incorporate cascading impacts like power outages, supply chain disruptions, or cyber incidents. Injects introduced during exercises provide time-sensitive information that mimics real-world dynamics, forcing participants to adapt plans, prioritize tasks, and communicate decisions under pressure. Designers balance realism with safety, ensuring that simulations challenge responders without placing personnel or communities at risk.
Participant roles and interagency coordination
JET exercises engage a diverse set of stakeholders, including local first responders, state emergency management, federal agencies, public health officials, private sector operators, critical infrastructure owners, and community representatives. Each participant group has defined roles and information needs, which are clarified in advance through pre-exercise briefings and supporting materials. Strong coordination structures, such as incident command systems and joint information centers, help ensure that decisions are made efficiently and that responsibilities are understood across jurisdictions and organizations.
Typical participant groups and responsibilities
| Participant group | Primary responsibilities in JET | Verification approach |
|---|---|---|
| Local first responders | Implement incident command, conduct initial response actions, communicate with dispatch | Observational evaluation and after-action reporting |
| State emergency management | Coordinate resources, request mutual aid, align with state plans and policies | After-action documentation and capability assessments |
| Federal agencies (e.g., FEMA, TSA) | Provide policy guidance, technical assistance, and federal resource coordination | Exercise evaluators and participant feedback |
| Private sector and critical infrastructure | Share threat information, test continuity plans, coordinate restoration | Pre-exercise planning and post-exercise improvement tracking |
| Public health and medical partners | Manage medical surge, coordinate patient transport, support public messaging | Functional drills and performance metrics |
Public communication and community resilience
A critical component of JET is how information is shared with the public before, during, and after an exercise or real event. Training often includes public information and warning activities, message development, rumor management, and coordination with media and community partners. These elements help build trust, ensure accurate information flow, and support protective actions that reduce harm. By integrating community voices into planning and evaluations, JET programs can better reflect local needs, enhance transparency, and strengthen resilience in vulnerable populations.
Community engagement practices
- Incorporate feedback from community leaders and advocacy groups into scenario and objective design.
- Use accessible language in public messages and provide multilingual materials where appropriate.
- Test warning systems and information channels to ensure they reach diverse audiences reliably.
- Document community-level impacts and lessons learned to refine future outreach and recovery plans.
Continuous improvement and lessons learned
DHS JET emphasizes structured after-action reviews, improvement planning, and measurable follow-up to ensure that exercise findings translate into tangible enhancements in policies, plans, and capabilities. Corrective action tracking assigns responsibilities, deadlines, and success criteria, enabling participating organizations to close identified gaps systematically. Over time, this approach helps align training with emerging risks, evolving technologies, and changes in the operational environment, supporting durable improvements in national preparedness and response.
By treating each exercise as part of an ongoing learning cycle, DHS JET helps participating organizations maintain readiness, refine interagency processes, and adapt to new threats and community expectations. The program’s long-term value lies in its ability to combine realistic training with systematic evaluation, turning observations into actionable improvements that strengthen coordination, build public trust, and improve outcomes during real emergencies.