One thing is for sure, being a commissioned based auto tech is not all its cracked up to be. So far today I have been on the struggle bus, trying to disconnect QD fuel lines off a 2010 6.7 Cummins for the P65 recall. The fuel heater got too hot, melted the electrical connector, and allowed diesel to leak out.
Everything is covered in the last 16 years worth of dirt. The recall came out back in around 2012 and the vehicle has now just come in to have the recall done. So who gets it? Me. Not some more senior Ed technician. Just some tech who just has enough training done to on paper, be "knowledgeable".
Don't become an auto tech, unless you are a sado masochist and, can be on a hybrid pay system.