US President Barack Obama will nominate Christopher Hart to be chairman of the US National Transportation Safety Board (NTSB).

Hart, NTSB’s vice chairman, has served as acting chairman since former chairman Deborah Hersman resigned from the board on April 25. Hart this week oversaw the NTSB’s public hearing releasing the board’s investigative findings on the Asiana Airlines Flight 214 crash. He has been a member of the board since August 2009 and was also a member from 1990-1993.

Hart has previously served as FAA deputy director-air traffic safety oversight and as FAA assistant administrator-system safety. His term as an NTSB member runs to Dec. 31, 2017. Hart’s nomination to be NTSB chairman will have to be confirmed by the Senate.