How many army role can you have?

There are about 77 different army roles such as chef, driver, armourer, HR specialist, postal courier, port operator, air dispatcher, cyber engineer, vehicle mechanic - the list goes on. Individuals only tend to be trained in one specialism although this could be to an exceptionally high level. However, the army really promotes additional learning and provides individuals with 'standard learning credits' each year which can go towards studying a qualification or learning a new skill. Hope this helps.