i know this is a fairly old post but my dad also works in that field so i thought that was cool! also my brother and probably other brother as well
it's a good profession to work in. if you put extra into your job you'll get rewarded at the end. My dad worked for warwick plumbing and heating corp. and just now started working as a field engeneer. my brother also works at WP&H so it's pretty cool, they are like 29th in the country i believe....