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By Staff Writer with Agencies
Washington, D.C. – The former top cybersecurity official at the National Security Agency (NSA) warned lawmakers on Wednesday that the Trump administration’s attempts to fire large numbers of probationary federal employees could be “devastating” to U.S. cybersecurity operations and national security.
Rob Joyce, who served as the NSA’s cybersecurity director before retiring last year, testified before the House Select Committee on the Chinese Communist Party, emphasizing the critical role of probationary employees in defending against cyber threats, particularly from China.
“Part of the defense is also having expertise and capacity in the government,” Joyce said. “I want to raise my grave concerns that the aggressive threats to cut U.S. government probationary employees will have a devastating impact on cybersecurity and our national security.”
🚨Former Acting U.S. Homeland Security Advisor Rob Joyce fears cutting probationary employees in the federal government would have a "devastating" impact on national security. pic.twitter.com/ZYoJxSAewa
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Probationary federal employees, typically those in their first year of service in a new position, play a vital role in agencies like the NSA. Many of them have prior government experience and undergo rigorous training to develop highly specialized skills necessary to counter cyber threats. Joyce highlighted that dismissing these employees would severely weaken efforts to combat Chinese hacking campaigns targeting U.S. critical infrastructure.
The Trump administration, through the Office of Personnel Management (OPM), attempted to fire nearly all federal probationary employees en masse shortly after taking office. However, a federal judge temporarily blocked the move, citing OPM’s lack of authority to terminate employees across multiple agencies. OPM has since revised its guidance, clarifying that individual departments and agencies must make their own firing decisions. Several agencies have already started reinstating some of the dismissed workers.
Joyce, who spent 34 years at the NSA, underscored the long-term impact of such mass dismissals.
“At my former agency, remarkable technical talent was recruited into developmental programs that provided intensive, unique training and hands-on experience to cultivate vital skills,” he explained. “Eliminating probationary employees will destroy a pipeline of top talent responsible for hunting and eradicating [Chinese] threats.”
Beyond the immediate loss of personnel, Joyce expressed concern that the uncertainty surrounding these job cuts has already prompted skilled cybersecurity professionals to seek employment elsewhere. “If the positions are not eliminated, the pervasive uncertainty and doubt in the current environment is forcing them to seek and secure opportunities for their families outside national security,” he warned.
Joyce’s concerns were echoed by other national security experts at the hearing. Emma Stewart, director of the Idaho National Laboratory’s Center for Securing Digital Energy Technology, stressed that losing trained personnel would mean “loss of knowledge that we’ve gained over several years,” potentially hampering coordination and deterrence against future cyberattacks.
Laura Galante, who led the Cyber Threat Integration Center at the Office of the Director of National Intelligence until January, described the attempted firings as a “significant blow” to the federal government’s cybersecurity capabilities. She noted that agencies like the NSA and the Cybersecurity and Infrastructure Security Agency (CISA) rely on these employees to lead and coordinate responses to cyber vulnerabilities.
“This will be a significant blow to the people who have come in over the last several years or who have waited on clearances sometimes upwards of a year or more to come in for technically important roles where training is limited on the outside,” Galante said. “They’re doing core work to secure U.S. networks.”
The testimony underscores growing concerns about the federal government’s ability to maintain a robust cyber defense at a time when adversaries, particularly China, are ramping up their efforts to infiltrate U.S. systems. With cyber threats evolving rapidly, experts warn that maintaining a skilled and stable workforce is essential to safeguarding national security.

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