Dr. David Mussington
Executive Assistant Director for Infrastructure Security (ISD)
Cybersecurity and Infrastructure Security Agency (CISA)

Dr. David Mussington currently serves as the Executive Assistant Director for Infrastructure Security at the Cybersecurity and Infrastructure Security Agency (CISA). Since February 2021, he continues to lead CISA’s efforts to secure the nation’s critical infrastructure in coordination with government and the private sector. Key areas of focus include vulnerability and risk assessments; securing public gatherings; developing and conducting training and exercises; and securing high-risk chemical facilities.