Mentorship Events: These events are designed to connect mentors and mentees. You may or may not find your mentor at one of these mentorship events.
Your Network: Ask the people in your network if they might be willing to serve as your mentor.
Beyond Your Network: Again look to the people in your network. Ask if they know someone in your field who might be interested in a mentorship.
Colleagues: Reach out to a colleague whose achievements mirror your ambitions.
Young Alumni: Young alumni are great mentors. They have been just where you are now, just a short while ago.