Reach out to them. Have a purpose for contacting them. Any advisor or mentor I ever utilized was very recognizable and established, so I have never had to look at a CV. And generally, I only reach out to people who have had recognizable roles in visible companies. That does not mean there are not good mentors out there in the shadows. In terms of finding them, do your research. You can find them on lists like the Forbes 400. You can read about them in reputable business magazines, or Media. Then email them. Never has connecting been so easy or accessible.