You’ll become an expert in explosives compositions and devices with the skill to advise others on the OME they’re using. You could work in the defence industry, testing, researching and developing new products. Or you could put your skills to use for entertainment, being a technician that helps to deliver a complex firework display or a special effect for an action movie.
Ordnance munitions explosives (OME) are used in many industries, including mining and quarrying, pyrotechnics (e.g. fireworks), and within the film industry for special effects. They are not unique to the Armed Forces.