
Critical Infrastructure Security and Resilience
Overview
Critical Infrastructure are those assets, systems, and networks that provide functions necessary for our way of life. There are 16 critical infrastructure sectors that are part of a complex, interconnected ecosystem and any threat to these sectors could have potentially debilitating national security, economic, and public health or safety consequences.
CISA’s Role
CISA provides guidance to support state, local, and industry partners in identifying the critical infrastructure sectors and the essential workers needed to maintain the services and functions Americans depend on daily.

16 Critical Infrastructure Sectors
There are 16 critical infrastructure sectors that are part of a complex, interconnected ecosystem.
Critical Infrastructure Exercises
CISA conducts cyber and physical security exercises with government and industry partners to enhance security and resilience of critical infrastructure. These exercises provide stakeholders with effective and practical mechanisms to identify best practices, lessons learned, and areas for improvement in plans and procedures. These exercises may also inform future planning, technical assistance, training, and education efforts.
CISA works with partners to design and conduct exercises that range from small-scale, discussion-based exercises to large-scale, operations-based exercises. CISA also offers a wide portfolio of downloadable CISA Tabletop Exercise Packages (CTEPs) to serve as an off-the-shelf solution for a variety of stakeholders’ exercise needs.
Exercise Planning and Conduct Support Services
Cybersecurity Scenarios
Physical Security Scenarios
Physical Security Scenarios
Cyber-Physical Convergence Scenarios
Cyber-Physical Convergence Scenarios
CISA Tabletop Exercise Package Documentation
Cyber Storm Cyber Exercise Series
Tabletop the Vote
Contact CISA Central
CISA Central is the simplest way for critical infrastructure partners and stakeholders to engage with CISA. Please contact Central@cisa.gov.