Having been to a recruitment interview for Flight Instructors and met Mr Camillus Byrne I must say that Sierra does come across as a professional and efficient organisation. As far as A&P or technician/ engineer wages are concerned I cant help ya. The deal they offered prospective instructors was payment on a commission basis ...no of flight/ground school hours billed to a client. Guys that flew 100 plus hrs a month were making around $1500-2000 gross per month which in and around San francisco isnt a lot. the other thing they wanted us to do was fly out to SFO and pay for standardisation training!!!
I left the meeting thinking Dont call me Ill call you...If you know what I mean...Hope this helps...