Modules > Talent > Account Admin > Select Employee > Edit > Click on Roles Tab > Assign Manage Project Reviews

Admin to Manage Project Review - manage the project performance reviews: create/manage projects, create/manage project evaluation forms, assign project evaluation forms to projects, review completed project evaluations

This permission does not give users the ability to complete a project evaluation.

Employee to Complete Project Reviews - permission to complete a project evaluation

Complete Project Reviews needs to be added as a Custom Role. See Custom Roles on how to assign a custom role to an employee.
Once the role has been created and assigned: Go to: Modules > Modules > Talent > Account Admin > Select Employee > Edit > Click on Roles Tab > Assign Complete Project Reviews