Possibly some confusion here
DBS/PVG - Basic vetting check for all staff working with young people. This needs to be in place before CI appointment can be confirmed.
SC - A more in depth Security Clearance for staff working with weapons/ammo or sensitive information. Mandatory for RCO/SAAI courses.
I'm assuming in this case it's DBS/PVG and not SC as it's a new staff member.