Unfortunately ( for you) a lot of those go by referral.
Pilot leaves and refers a buddy to take their place.
A lot of the SE check runners went out of business.
https://www.pilothiring.com/pilot-jobs-aircraft/Cessna_Single_Piston&Piper_Single_Engine.html
http://www.airlinepilotforums.com/part-91-low-time/96604-survey-pilot-positions-available-2.html#post2205684