The T'NITES Alumni Association (TAA) was officially established and registered on 2nd January 2001, with the registration serial number 1153. For 23 glorious years, the association has served as a vital link for the alumni of Sir Tashi Namgyal Senior Secondary School (TNSS).

The primary aim of the TAA is to cater to the Academic, Vocational, Co-curricular, and Career needs of the students of TNSS. To achieve these objectives, the association has been working to build a strong and supportive alumni community. Initially, the TAA had approximately 1800 alumni in its reserve until January 2023. The 6th Executive Body (2023-2024) marked a significant step with the assembly of a real-time registered team, resulting from the T'NITE Reunion Meet Initiative (TRMI) Programme, which has led to over 200 permanently registered members. This initiative has evolved into a Membership Code.

The association actively organises events to foster fellowship and networking among its members, such as the successful T'NITE Alumni Meet-2023 held at Chintan Bhawan, Gangtok, and the T'NITE Alumni Picnic-2024 near Sunder Resort, Majitar. Furthermore, the TAA proudly launched its first-ever Alma Mater Magazine, "Legacy Echoes" in 2024, which is intended to be an annual publication to keep alumni informed and connected.

The TAA stands as a testament to the enduring legacy and the strong bonds forged at Sir Tashi Namgyal Senior Secondary School.