What the guys all say is true - have integrity, make decisions (you will make loads, some of them result in your signature, and mean you are signing to say that an aircraft has operational limitations that you want to make the aircrew aware of, or is airworthy despite having defects). Being an RAF EngO is a great profession, but you must always make the aircrew's safety, as well as that of your groundcrew (YOUR people) the main priority. Before I was let loose, the Wg Cdr authorising me simply said "never make a decision that will lose you sleep at night". Your groundcrew will respect you for having the guts, and you will have earned your rations in terms of looking after the aircrew. The aircrew will thank you in their own time.