I've just had to slap down (intellectually speaking and with as much tact and diplomacy as I could muster) a jumped up junior member of staff outside my department who questioned my professional judgement in a rather curt manner. In the short term I feel smug and self satisfied (surprise ?) as naturally I was right although this has the potential future problems as he has a degree of autonomy that could affect my relationship with key professional contacts. Anyone have any tips for gently forcing through an opinion without creating bad feeling?
I should say that this particular individual has a reputation for being an arse but I'd rather keep people on side at the moment.