I have just graduated frm a gud engg coll. i want pursue consulting in mechanical engg. wat shud i do nxt??

well i have got job in oil refineries field. i am thnking of wrking for a couple of years and thn go for higher studies. i want to do masters in vibrations and subsequently be a consultant in that field. i dont know which courses to take in grad school. any light in that area wud be helpful.