I work in engineering and I work with fatarses all day. With the office job, I don't have nearly as much face to face contact as with training, but there are certainly fewer triggering opportunities. It depends what you want from a job. There is pay, job opportunities, sustainability of the vocation (what will happen to the fitness industry as HAES progresses?), what kind of working hours you want (I earn less now, but a steady 9-5 is much more convenient), and of course what you enjoy (though working your passion can suck the joy from it). Also don't forget you can transition from one to the other later as long as you keep your doors open. Why do you want to quit engineering?