Tim Maurer has focused on cybersecurity in the international and financial services spheres.

“The cybersecurity of our nation [will be] one of my highest priorities,” Mayorkas said in his confirmation hearing.

It's the role formerly held by Chris Krebs, whom Donald Trump fired via tweet.

A day before his inauguration, Biden's picks for top Cabinet posts faced cyber questions in their confirmation hearings.

"He recognizes he’s not a cyber expert, but he goes to those who help him make informed decisions," said Greg Touhill, a former senior DHS official.