Cory Thesan » Grangeville High School Staff Directory Go back to directory. Add to Address Book. Cory Thesan Head Custodian Grangeville High SchoolCustodial Other 910 South D Street, Grangeville, ID 83530 postal Work Phone: 208-983-0580work Work Email: thesanc@sd244.orgINTERNET Categories: custodial staff, Grangeville High School Updated 5 months ago.