Jarom was a full-time producer at BYU before they moved him into the SN thing with Spencer. He still calls some games and other BYU sports stuff in addition to SN.
Jordan will likely stay at BYU and eventually take over Greg's job, when he hangs it up. That's his goal anyway.
http://universe.byu.edu/2014/08/09/from-student-job-to-dream-job/