Complex Table Relationships Question

I currently have the following:

• An employee table (built already)– where each individual gets a row with their demographic info
• An annual employment snapshot (built already) – where each individual gets a row for each year they're employed (e.g., if someone has been employed for five years, they get five rows)

Do you have any ideas on how I can achieve the following?
    - Track each individual's mentors by year in the employee snapshot table (in any given year, an individual can have several mentors). I envision it looking like what's below.
    - Have the mentor linked to the employee table (so, each mentor can be linked to their demographic information). I envision it looking like what's below.

Employment snapshot data:

When I click Employee1's 2020 mentors table link I get:

And the mentors are linked to the employee table (Mentors will always be someone in the people table)

Thank you.