A person can be expert in nothing, but they must be practiced in many things. You don't have to master them all at once. You simply have to collect and develop a certain number of skills as the years tick by. People count on you to come through.
Ops-Core FAST Ballistic Helmet is increasingly becoming the new standard, for the most part replacing MICH variants among special forces units around the world, and also currently being adopted as the standard helmet for the entire Norwegian military.