The school serves the central west section of Hamilton County for students in grades 6-12.

In August 2009, Gravitte was removed as principal by HCDE administration and replaced by Dr. Tom McCullough.

[9] By early 2018, a consensus on the possibility of breaking away had not been met, though a town council committee formed to investigate the viability of the move was disbanded, effectively ending the debate.

Harwood retired following the 2022-2023 school year and was replaced by Michael Carson, a former Vice Principal at SMMHS.

The Signal Corps Marching Band won the Division II State Championship on November 6, 2021.

The Signal Mountain Theatre Department put on productions of "The Odd Couple", "Into the Woods", and "Pride and Prejudice" recently and will be hosting their annual Senior Scenes competition on January 21.

Signal Mountain has participated in academic competitions, including Youth in Government, Model United Nations, Technology Student Association, and in mock trial.