Gregory Barbaccia is an American intelligence officer who has served as the federal chief information officer of the United States since January 2025. Barbaccia has additionally served as the federal chief artificial intelligence officer since July 2025, the federal government service delivery lead since September 2025, and the acting director of Technology Transformation Services since February 2026.

Barbaccia began working as a civilian intelligence analyst in the United States Army in 2003. He enlisted the following year and became an intelligence sergeant. In 2008, Barbaccia became an intelligence analyst in the United States Intelligence Community. In 2010, he joined Palantir and became its head of intelligence and investigations in 2017. Barbaccia left Palantir in 2020 to become the president and head of investigations of Elementus, a Web3 company, and the chief information security officer of Theorem, a credit underwriting company.

In January 2025, President Donald Trump named Barbaccia as the federal chief information officer of the United States. He later became the federal chief artificial intelligence officer, the federal government service delivery lead, and the acting director of Technology Transformation Services