If you are thinking of working in Jamaica, you need to obtain a work permit for this. You will have to apply for the work-permit application and obtain it before you get the Jamaica visa. Travelers will have to fill up the work-permit application in the country where they are staying with the Jamaican High Commission, Embassy or Consulate.
Nationals of many countries are not required to apply for a tourist visa to Jamaica. Some of the countries included in this list are - Australia, Bahamas, Barbados, Canada, India, Ireland, Kenya, Malaysia, Mauritius, New Zealand and United Kingdom etc. Nationals of commonwealth countries do not require a visa to Jamaica for any period or reason of stay.
Students who would like to take up a course in the country must posses a valid visa for the same. Along with this, they must also carry documented proof of their acceptance to a college in Jamaica along with proof of having adequate money while staying in Jamaica, along with others. Basically, there are different types of visa to Jamaica and you need to obtain one based on your requirements. Get in touch with the embassy to know the exact requirements and other details, if you have any doubts.