Complex sentence: Hussain, a Muslim of Indian heritage, has served in the White House Counsel's Office and on the National Security Council, and in his role as Envoy, has advised the Administration on policy issues related to the Muslim world.
Split into simpler sentences: Hussain, a Muslim of Indian heritage, has served in the White House Counsel's Office and on the National Security Council. In his role as Envoy, Hussain has advised the Administration on policy issues related to the Muslim world.