Presentations, when’s the best time to give your personal background?
My answer to Presentations, when’s the best time to give your personal background? on Quora
It’s rarely a good idea to include this—usually it adds nothing to the audience’s understanding of presentation, unless you are speaking on a topic that really needs that additional authority (security presentations sometimes benefit from this)—in which case keep it to a couple of sentences, don’t share your entire professional history.
Weaving examples and interesting anecdotes from your own experience in to your presentation is always a good idea though.