DCIO Cyber security


Photograph of Essye Miller Ms. Essye Miller is the Deputy Chief Information Officer for Cyber Security (DCIO CS) and acts as the Department’s Chief Information Security Officer (CISO).  In this capacity, she ensures that the Department has a well-defined and well-executed cybersecurity program. She also coordinates cybersecurity standards, policies, and procedures across federal agencies, coalition partners, and industry.

Photograph of Marianne Bailey Ms. Marianne Bailey is the Principal Director for DCIO Cybersecurity and the Department's CISO. She is responsible for overseeing the Department of Defense's cybersecurity program to include relevant cybersecurity standards, policies and procedures partnering across the government and industry. She joined the National Security Agency (NSA) in 1984 and has 30 years of experience in Information Assurance/ Cybersecurity and Information Systems Security Engineering. Prior to joining the DoD CIO she was the Assistant Deputy Director of Trusted Engineering Solutions at NSA. .

Organizational Chart

DoD CIO CS Chart


DoD Seal

Deputy Chief Information Officer for Cyber Security – which is also the Chief Information Security Officer or

CISO for the Department of Defense – is responsible for ensuring that the Department has a well-defined and well-executed cyber security program. This organization is also responsible for coordinating cyber security standards, policies, and procedures with other federal agencies, coalition partners, and industry.

DCIO CS oversees Cybersecurity Strategy, Policy, and Workforce, including technology innovation and the Risk Management Framework, as well as Cybersecurity Implementation and Acquisition Integration, such as acquisition oversight; identity and access management, or IDAM; and lifecycle risk management, standards, and integration. It also oversees efforts to improve Defense Industrial Base cyber security.

This organization focuses on advancing cyber basics and improving cyber defenses, which are two of DoD CIO’s top priorities. DoD is getting better at cyber basics by transitioning from passwords to more secure means of granting access, ensuring the patching is up to date, and cleaning up operating systems. And DCIO CS is improving cyber defenses on its networks through means such as secure configuration, fast patching, and web-content filtering. The top objective of DCIO CS is to ensure successful mission execution in the face of cyber warfare by a capable adversary.

DCIO CS focuses on defending DoD missions against cyber attack.