In my experience all key research personnel Qualification documentation are filed in TMF.
Qualification documents for PI and all key research personnel
• CITI Certifications (requirement is every 2 years)
• Medical licenses for physicians and nurses
• Current CVs for all study team members
• Study-specific training: Documentation of protocol review with study team, in-service
• Research-related training documentation
• Spanning duration of study or assignment to study
• Maybe maintained in a separate “credential binder(s)” with a documentation of where to locate this.