A Santa Barbara laboratory tasked with helping safeguard the USA’s nuclear arsenal has been 𝘴ℓappєḋ with a proposed $196,350 federal fine over serious security failures.

Investigators found that classified information was processed on unauthorized computer systems, potentially putting some of the country’s most 𝘴єn𝘴iᩚtiᩚvє secrets at risk.

The National Nuclear Security Administration (NNSA) found that the Special Technologies Laboratory violated federal security requirements, with one of the violations receiving the Department of Energy‘s highest severity rating. 

It’s a classification reserved for incidents involving actual harm or a significant potential threat to national security.

The agency announced a Preliminary Notice of Violation on Oct. 16 to Mission Support and Test Services, LLC (MSTS), the contractor that operates the facility on Ekwill Street in Santa Barbara.

Federal investigators identified four violations in total, including one classified as Severity Level I, two as Severity Level II and another as Severity Level III.

Authorities have not disclosed what classified information was mishandled or whether anyone without proper authorization gained access to it.

The security failures are particularly concerning given the laboratory’s role in protecting the country’s nuclear stockpile and monitoring potential nuclear threats abroad.

The facility, which operates as part of the Nevada National Security Sites under the NNSA, develops advanced technologies used to assess the safety and reliability of US nuclear weapons.

Its scientists and engineers also work on detecting foreign nuclear weapons programs, nuclear counterterrorism, intelligence gathering and cybersecurity.

Some of that work involves combining artificial intelligence with sophisticated sensors to detect suspicious activity and protect ᑕriᩚtiᩚcal infrastructure.

The violations involved classified information being processed on computer systems that were not approved to handle such 𝘴єn𝘴iᩚtiᩚvє material.

Federal security requirements mandate that classified information be handled on authorized systems with safeguards designed to prevent unauthorized access or disclosure.

Using systems that lack those protections can create vulnerabilities, although officials have not established publicly that any classified material was stolen or leaked.

The security incident that prompted the investigation dates back to March 2024, more than two years before the NNSA announced its proposed penalty.

Mission Support and Test Services initially marked the incident as closed in the Energy Department’s security reporting system on Aug. 5, 2024. 

The contractor subsequently notified the department’s intelligence and counterintelligence office in February 2025.

But federal officials continued examining the matter.

Investigators conducted a fact-finding review at the Santa Barbara laboratory between June 10 and June 12, 2025, gathering information about the handling of classified material.

By September 2025, the Energy Department had launched a formal investigation into whether classified information had been processed on unauthorized systems.

A Sept. 10 letter to the contractor indicated that investigators would also examine whether the incident reflected broader failures to comply with federal security requirements.

The department said it would rely on documents collected before and during the site visit, without conducting additional employee interviews or inspections.

The Special Technologies Laboratory has operated in the Santa Barbara area for more than six decades and maintains ties to the region’s technology community. In 2023, it co-sponsored the local TechTopia summit.

In determining the proposed $196,350 penalty, federal officials considered the seriousness of the security violations, weaknesses in the contractor’s security program and corrective measures taken to prevent similar incidents.

However, the NNSA’s publicly available summary does not detail what specific changes were implemented or whether all security vulnerabilities have been resolved.

MSTS can challenge the findings or request a reduction in the financial penalty. 

Under federal regulations, the contractor generally has 30 calendar days after receiving the notice to respond.

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