Video: President Donald J. Trump Announces Intent to Nominate Kirstjen Nielsen as Secretary of Homeland Security 10/12/2017 9:22:31 PM   facebook Google+ ► Print Kirstjen Nielsen Trumps New Homeland Security Secretary President Trump Announces NEW Secretary of Homeland Security Nominee Kirstjen Nielsen The White House Office of the Press Secretary October 11, 2017 Today, President Donald J. Trump announced his intent to nominate Kirstjen Nielsen for the position of Secretary of Homeland Security. Ms. Nielsen is currently the White House principal deputy chief of staff. Ms. Nielsen has extensive professional experience in the areas of homeland security policy and strategy, cybersecurity, critical infrastructure, and emergency management. She is the first nominee for this position to have previously worked within the Department of Homeland Security, having served there in two administrations, first as senior legislative policy dire...