This is a lie. What she’s referring to is Michael Pack’s accusations that the USAGM was “ripe for espionage, and possibly rife with spies.” “It’s a great place to put a foreign spy,” Pack said, citing what he contended were severe security lapses by previous leadership.

From the linked article:

“Pack’s insistence that there were issues related to security in hiring at VOA is merely a smokescreen to avert attention from his blatant attempt to interfere with the legislatively mandated independence, or ‘firewall’, protecting the journalists of VOA from government interference,” said former USAGM CEO John Lansing. Lansing is now the CEO of NPR.”

I could find no real record of actual spies who were removed from the USAGM for any kind of “spying” activities.

Full contextual analysis of Section 2.5: Media Agencies: U.S. Agency for Global Media & Corporation for Public Broadcasting here.