When you've been in the workforce for over 10+ years, the first thing to change is the mentor-mentee relationship. You're no longer right out of school and you have experience, so by definition the types of mentorship you need is different.
One of the most untapped resources are PEER mentors, people who are at your level of the organization, who you likely collaborate with frequently, and who also share varying degrees of expertise. Invest in this brain trust.
Added benefits? With strong peer mentors you'll have a stronger view of the needs across your organization. Collectively, each of you can help one another collectively rise as a cohort. Last, often times in year-end assessments, it is feedback from peers that is weighted heavily.
How do you build strong peer mentors? MENTOR BACK. Teach your peers what you know, share generously and look for ways to help them also grow. I guarantee you'll find this also makes for a much happier work environment.