Politico first reported earlier on Tuesday that the position had been scrapped, citing an email from an aide to national security adviser John Bolton that was sent to NSC employees, and provided to the newspaper by a former USA official.
The cyber coordinator position, established under the Obama administration, was most recently held by Rob Joyce, a former National Security Agency (NSA) official widely respected by current and former officials for his breadth of expertise in cybersecurity.
The email, sent by Bolton's aide Christine Samuelian, reads: "The role of cyber coordinator will end".
The National Security Council reportedly argues the move's about reducing bureaucracy, not reducing security, according to a statement obtained by several news outlets. The NSC's cyber team has two senior directors, the email said, and thus "cyber coordination is already a core capability".
The executive dismissal comes a week after Politico first reported Bolton was highly considering removing the White House role of cyber policy adviser.
Nielsen said DHS has "strengthened all of our relationships with the silos" in government that Peters mentioned in his question, and said she is in regular contact with Bolton on cybersecurity, the previous statement notwithstanding.
"This move impedes our country's strategic efforts to counter cybersecurity threats against our country", he said. "It will focus on coordinating departmental cybersecurity activities to ensure a unity of effort".
Former Homeland Security Adviser Tom Bossert, Jocye's boss, oversaw the cybersecurity program and was pushed out of the White House on Bolton's second day on the job.
The Trump administration has eliminated the White House's top cyber policy role, Politico reports.