One of the most common interview questions you will ever be asked is, "Tell me about yourself ..." While this seems a rather innocuous and simple query, so many candidates struggle, as they overthink and worry about the hidden motivation of this type of question so early in the interview.
The good news is that, on most occasions, this is designed as a "gimme" question. One that helps break the ice between the interviewer and the candidate and develops a positive rapport before the tough questions start.
A great way to answer this seemingly tricky question, is using the "4P" approach:
Past
Start your answer by detailing a linear journey of your qualifications and career over the past 20 odd years, remembering to focus on skills and expertise that are relevant to the position you're applying for. Usually you mention key qualifications first, then briefly run through your career up to your last position for about 30-45 seconds. Use the "funnel" approach, providing a small amount of detail for earlier experience, building this up for more recent positions.