Excise(GST)-if hv attitude to keep himself relaxed, only interested in regular work and salaryCustoms - if you are vigil and interested to do hard work and can handle always new issues.Directorates- there are many directorates which have specific work though out service viz. DRI, DGGST, u0935u093fu091cu093fu0932u0947u0902u0938, SAFE GUARD, AUDIT. Long working hours required in these directorates also intelligenceNow u may decide