
Critical Infrastructure Security and Resilience
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 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.
Whistleblower Retaliation
If you work in any of these Critical Infrastructure Sectors and you feel you’ve been retaliated against for raising concerns to your employer or regulators about critical infrastructure, you may contact the U.S. Department of Labor Occupational Safety and Health Administration (OSHA). OSHA’s Whistleblower Protection Program enforces over 20 anti-retaliation statutes that may protect your report. More information can be found at the link below. Complaints with OSHA can be filed online.
Featured Content
Learn about important initiatives that support and protect our vital critical infrastructure systems.

Shields Ready
Shields Ready drives action at the intersection of critical infrastructure resilience and national preparedness. The focus is on making resilience during incidents a reality by taking action before incidents occur.

Cybersecurity for K-12
CISA is placing a focus on working with the K-12 education sector to help raise awareness and understanding of the risks as well as to change behaviors that put us at risk of phishing and other online attacks.

Healthcare and Public Health Cybersecurity
To help improve cybersecurity within the HPH sector, CISA and our partners are working together to deliver tools, resources, training, and information that can help organizations within this sector.

Water and Wastewater Cybersecurity
This toolkit highlights the most relevant CISA and EPA resources to protect against, and reduce impacts from, threats posed by malicious cyber actors looking to attack water and wastewater systems.
News and Alerts
Check out the latest blogs, press releases, and alerts and advisories from CISA.
CISA Releases the Marine Transportation System Resilience Assessment Guide
Critical Infrastructure Exercises
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.

Cybersecurity Scenarios
Physical Security Scenarios
Cyber-Physical Convergence Scenarios
CISA Tabletop Exercise Package Documentation
Services
CISA offers a variety of services to support critical infrastructure resiliency and security.
Assist Visits
Exercise Planning and Conduct Support Services
Infrastructure Survey Tool (IST)
Multi-Asset and System Assessment (MASA)
Contact CISA Central
CISA Central is the simplest way for critical infrastructure partners and stakeholders to engage with CISA. Please contact Central@cisa.gov.