(CNN) President Donald Trump's new personnel chief told agency officials at a meeting on Thursday to expect staffing changes and movements across the government, people familiar with the meeting told CNN.

A White House official said John McEntee, the President's former body man who was elevated to run the presidential personnel office, made it clear his office will be on the lookout for staffers across the bureaucracy who are seen as disloyal to Trump.

Another official said McEntee indicated he plans to first focus his efforts on personnel at the State Department and Department of Defense. He also told the liaisons that promotions and significant staff changes should not occur without prior approval from the presidential personnel office.

In his role, McEntee focuses on political appointees at various agencies, not career staff. Hiring and firing of career government employees are typically handled at the agency level.

One person who attended said the meeting was mostly introductory and a chance for the liaisons to highlight potential problems at the agencies. McEntee asked them to let him know about people they believe are working against the President's agenda.

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