Sussex Tech became a full-time high school in 1991, offering a comprehensive program of academic courses as well as technical education.

Also, Sussex Tech's Raven Nation Marching Band was featured in Chicago's McDonald's Thanksgiving Parade in 2012.

The new library emphasized the school's technical focus, relying on computer workstations for access to resources in external networks.

Auditors found that $8,000 were missing from the account, and the nutrition supervisor informed them that the school's principal purchased televisions and audio equipment for the cafeteria.

The teacher alleged that the school was mass-producing copyrighted text books and other materials without the consent of the publishers.

A few months later, the same businessman was awarded the contract to redevelop the same parcel and construct a new bus entrance for the school.

[13] In June 2017, during the investigation, senior officials at the high school were placed on paid leave.

[14] Sussex Technical High School's athletic teams participate in the Henlopen Conference.

[15] In October 2019, Sussex Tech’s request for a certificate of necessity was denied by the Delaware Department of Education.

[17] In February 2022 the district announced plans for moving forward to build a new high school on the site of its current location.