Seen largely in enterprise-scale organizations, Storage Engineers focus on managing storage technologies such as disk arrays, Network Attached Storage (NAS) devices, Storage Area Networks (SANs), Tape and Media management systems and related backup technologies.
Storage Engineers provision, configure and manage this infrastructure which then provides storage for web and file servers, database systems, applications and backups.
They usually have strong skill overlaps with Network Engineers (with so much modern storage being network-attached in some manner) and usually have strong skills in capacity planning and performance management of infrastructure.