Your career responsibilities are somewhat like mine. Major responsibilities, long hours, away from home (I get home on the weekends though). Personally, I wouldn't make any career decisions while in early sobriety. I am finding that I can easily handle the stress and I like the responsibilty now that I don't have to contend with hangovers, exhaustion, and drinking-related work issues. I am frustrated that I am unable to attend many AA meetings and work with my sponsor as much as I would like to but I am trying to accept it as being meant to be this way.
As far as a reward goes, waking up without a hangover, guilt free, and with a sense of accomplishment is my reward. I do have some tough times after work (mainly loneliness and a sense of being deprived) but this reward has been one of the things keeping me motivated.