Hi Jocelyn, it's a good idea to introduce your self first. If you are on the phone you can say, " Good morning. Can you help me? My name is Dr Jocelyn from XXX University. Whom am I speaking to?" In a social situation, introduce yourself and what you do, then the other person should tell you . Example: "Hello, I'm Jocelyn. I'm the marketing manager for XXXX company"

What’s your job? Or What is your job title? Or What do you do? Or What’s your position title? Or What is your position?

yo dude, what's your job title? :P