1951
Mr FR Schmidt was the first principal secretary of the Technical Institute in Welkom.
There were 120 young men in training. The first building was an old community centre in Welkom.
Six months later the Institute moved to a larger building in Uitzichtkamp.
1955
In January they moved to the first permanent buildings.
1956
Permission was obtained to erect the necessary buildings for a Technical High School and a Commercial High School.
1957
The Technical High School and Commercial High School was established. In June, Mr MCH le Page, took over as principal.
1959
During the first six months the Technical High School and Commercial High School shared the same buildings. Mr PJC Bosch was the vice-principal. Mr MCH le Page moved to another town.
1960
Mr SD van der Merwe became the new principal. School uniform became compulsory. Buildings were officially opened by the Honourable Mr JH Viljoen.
1961
In August college status was awarded to the Institute. A hostel was planned for 120 students.
1962
In June Mr SD van der Merwe moved away and Mr JT van der Merwe took over as the new principal.
1964
On 14 August the hostel was officially opened by the Honourable minister J de Klerk.
House Gratia – Gratitude
1965
The College was taken over by the Department of Education, Arts and Science.
It became a departmental institution. With the takeover it became an independent school.
1966
Mr PJC Bosch passed away. Mr AJ du Plessis became principal for 24 years (from 1966 to 1990). On 30 April the PJC Bosch-stadium was inaugurated.
1968
From 1 April the school fell under the OFS Provincial Administration as a vocational school.
1990
Mr B du Toit was appointed principal from mid-June.
2002
Mr GI Hinrichs, was appointed principal at THS for 10 years (from 2002-2012).
2013
Mr PJH Swanepoel was appointed principal and is currently the principal
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