He also began serving as White House Homeland Security Adviser to President Donald Trump on an acting basis after the resignation of Tom Bossert[1][2][3] from April 10, 2018, to May 31, 2018.

[13] Other consulting clients include Microsoft, PwC, Beacon Global Strategies,[14] Sandfly Security[15] and he routinely speaks professionally through Leading Authorities Speaker's Bureau.

[21][22] In his current position he continues to speak publicly about nation state cybersecurity threats, including a 2018 DEF CON keynote.

[30][31][32] In that role, he gave a rare public talk at the USENIX Enigma Cybersecurity conference about disrupting nation state hackers.

[17] After John R. Bolton pushed out Tom Bossert as the Homeland Security advisor, Joyce announced he had completed this twelve-month detail to the White House and gave 30 days notice that he was returning to NSA because of the difficulties in getting priority attention for cyber policy in the administration.