Lt. Gen. Michael Flynn, national security adviser
Obama administration counterparts: James Jones, Thomas Donilon, Susan Rice(current)
Duties: Provide the president's daily national security briefing; coordinate the administration's foreign policy, intelligence, and military efforts
Flynn's former jobs: director of the Defense Intelligence Agency
Bio: Flynn, 58, joined the Army as a second lieutenant in military intelligence when he graduated from the University of Rhode Island in 1981. Serving at home and abroad, Flynn worked his way up the ranks of the armed forces, eventually becoming the director of the Defense Intelligence Agency in 2012. The lieutenant general retired from the position in 2014. A registered Democrat, Flynn became an early supporter of Trump's, advising the president-elect on national security matters during the campaign. He and his wife, Lori, have two sons.
Reactions: Flynn has been criticized for being anti-Islamic, for his questionable business ties to Turkey's increasingly authoritarian president, for what some see as his overly positive views toward Russia, and for promoting conspiracy theories on Twitter during Trump's campaign. He was also accused of being too hawkish when he was DIA director, which is why a former Pentagon official alleged Flynn was forced out of the agency.