I was hired in April of this year and he was hired in about October of last year. He's got seniority.
He has more skills than I do and is used for more things than I.
He just turned 35 and I will turn 42 in a couple of months. I am about 7 years older.
Here is something else that I've noticed about his work behavior: I was hired to do specific jobs around the place. He not only does his own jobs but some of mine, as well, leaving me looking for things to do when it's slow.
I feel almost obsolete around him as he's working even harder to do some of my stuff, too.
Did I encroach on "his turf?" Jealousy happening here? Hmmm...
I also got a special mention of thanks for being "awesome" doing my job.
Might he feel threatened by my industriousness on the job?