golfcaptain,
forget what Hermie told you. there are few gound handling companies in seletar, the two main ones are Jet and Universal.
for gnd handling wise, Uni is better, cheaper and more thoughtful with human touch. though they do not have the maintainence facilities but you can do it with Hawker Pacific which is very good.
as for jet, a high class outfit,though their maintainence hangar is very well equipped and a brand name, but they are very expensive, the present and only dispatcher is not experience and helpful, and certainly lack of that sincere human touch.
names and telephone nos for both companies are available, if you are interested, let me know and i will mail you.
cheers.