Choose one, guard, staff(ranger team e.t.c), or scienist. As guard, you need to keep maximum seciurity and dont let any dino escape, you will have AK-14 and glock in your equpmient. Sometimes, you need to calm down a dino As staff, you need to food or give medicine to sick ones. As scienist you are resarching for other dinosaurus DNA, but also working with them by observing them. You can choose 3 to work with.