During the Battle of Charon (as it is now being called where the Real DDS base was destroyed - though Real DDS themselves actually escaped), Asian Hawk and Akbar were both killed. Caratore has named Parallax as Akbar's replacement as Head of the Space Fleet. As Parallax was previously head of the Home Defence Fleet this promotion is not a surprise.
The promotion of Oberon to replace Asian Hawk as head of the Rapid Reaction Force is a surprise though. Oberon is a long-serving NS officer who even served at the end of the Clone Wars. He has continued to serve in total obscurity, spending most of his time as a bridge officer on frigates. After the defeat of NS to MBO, Oberon was finally promoted to the command track. Though it is notable that he has never captained a ship.
Caratore has yet to decide who will replace The Shiner as head of NS Facilities.