The service engineer jobs are mostly sales jobs, you go to peoples house to service their old kirby cleaner but your main objective is to get them to upgrade to the latest model by offering a big discount by part-exing their old cleaner.
Can't remember all the figures of upgrade uptake and prices but the guy who interviewed me was quite upfront about it all and answered all my questions.
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates