CRISTINA CERVANTES » Agency Wide Contact Information Go back to directory. Add to Address Book. CRISTINA CERVANTES SUBSTITUTE TEACHER HES Yuma AZ 85365 work Work Phone: 928-782-1886work Work Fax: 928-782-0042workfax Work Email: cristina.cervantes@wacog.comINTERNET Categories: Uncategorized Updated 5 years ago.