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Chris Fall has left his role as director of the Center for AI Standards and Innovation (CAISI) roughly three months after taking the job, according to the Department of Commerce. The agency said NIST Director Dr. Arvind Raman will oversee the federal AI testing lab as acting director while officials search for a replacement.
CAISI plays a central role in evaluating whether advanced AI models could pose cybersecurity and national security risks, including support for offensive hacking or assistance related to biological and nuclear weapons development. The lab has been testing frontier models from companies including OpenAI and Anthropic, and the White House has highlighted its importance in assessing how rapidly advancing AI systems could reshape cyber capabilities.
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The Department of Commerce confirmed that Chris Fall is stepping down as director of the Center for AI Standards and Innovation roughly three months after taking the role. NIST Director Dr. Arvind Raman will oversee CAISI as acting director while the position is backfilled.
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Microsoft, Google, and xAI agreed to give the U.S. Commerce Department pre-release access to frontier AI models so the government can test them for national security and public safety risks before broader deployment. The evaluations will be led by the Center for AI Standards and Innovation (**CAISI**), housed within **NIST**, and will examine threats including AI-enabled cyberattacks, biosecurity concerns, chemical-weapons misuse, and other criminal abuse. Officials said the models will be assessed in classified environments, with some testing designed to study systems whose safeguards have been reduced or removed to better understand unmitigated capabilities and failure modes. The agreements expand earlier voluntary arrangements and align with a broader push for more formal federal oversight of advanced AI, including reported consideration of an executive order establishing government testing protocols before models reach the market. Microsoft said it will also work with CAISI, NIST, and the UK **AI Security Institute** on adversarial assessment methods, safeguard testing, and frontier safety research, while U.S. officials described the effort as part of a wider strategy to measure unexpected behaviors and misuse pathways in powerful models. Industry groups have largely backed the initiative, framing it as a way to improve trust in commercial AI systems while addressing mounting concern over models that could support offensive cyber operations or other high-risk uses.
Jun 29, 2026
The Cybersecurity and Infrastructure Security Agency (**CISA**) is undergoing a leadership transition marked by the departure of its chief information officer, **Robert Costello**, who announced he is leaving after nearly five years in the role. Reporting indicates Costello’s exit follows internal turbulence, including conflicting accounts about whether then-acting director **Madhu Gottumukkala** attempted to push him out and subsequent transfer orders that raised the prospect of reassignment elsewhere in DHS; Costello had public support from some lawmakers and had been a visible advocate for modernization and improved tooling at the agency. Separately, CISA named **Chris Butera** as acting executive assistant director for the agency’s **cybersecurity division** amid broader leadership shakeups: Gottumukkala was moved to another DHS role, and **Nick Andersen** assumed leadership of the agency. The changes come as CISA continues to face workforce attrition tied to broader federal staffing reductions, with additional departures expected within the cyber division, raising concerns about sustained capacity to execute CISA’s mission to address major cyber threats, vulnerability response, and critical infrastructure resilience.
Jun 29, 2026
US federal cyber and IT leadership saw multiple high-profile personnel moves, including a planned transition at the **Cybersecurity and Infrastructure Security Agency (CISA)**. Acting director **Madhu Gottumukkala** is expected to leave CISA for a new Department of Homeland Security role as director of strategic implementation, with **Nick Andersen** (CISA’s executive assistant director for cybersecurity) slated to become acting director. Separately, CISA **CIO Bob Costello** reportedly received reassignment/transfer orders and is expected to depart the agency, with reporting indicating he may have been offered reassignment to **FEMA**; the reasons for the move were not publicly clarified. In parallel, Senate confirmation politics affected senior national cyber leadership: Sen. **Ron Wyden** said he would block confirmation of Lt. Gen. **Joshua Rudd** to lead both **U.S. Cyber Command** and the **NSA**, citing a lack of cyber and signals intelligence experience and concerns about his understanding of NSA surveillance authorities. Outside the cyber agencies, the **Department of Justice** elevated **Nikki Collier** from deputy CIO to permanent CIO, following a prolonged vacancy after the prior CIO’s departure, underscoring broader federal IT leadership churn during a period of workforce reductions and ongoing scrutiny of security governance practices.
Jun 29, 2026