Four years in the Navy, and he made it all the way from E-1 to E-2. Clearly a hard charger.
I would probably guess his career progression was something along the lines of E-1, E-2, E-3, (possibly E-1), E-2, in four years. I think E-3 is automatic somewhere at a year after making E-2, or it used to be something like that. We will have to wait for our active duty squid to chime in.
bob
edit. E-1 to E-2 9 months as E-1, E-2 to E-3 9 months as E-2. One thing for sure, whatever his career progression was he was a hard charger!!!!