10 years experience. Better be able to fix things. Anyone can fix stuff. Question is...Can you sell anything? Do you inform customers? Do you give options, or do you just change parts? Do you do the best for your company? These are the questions you need ask yourself.
You'd think it be the other way around, imo; I thought S.E. was a rather large installment owned by Lennox Industries...? And ARS kind of a smaller organization, with presence mainly in Eastern US. I could be wrong though.