The college was started in the sacred memory of Thanthai Hans Roever. Fr.Roever was a German missionary and Civil Engineer by profession and born of very rich parents at Roestock. Even as a small boy, the teachings of Jesus Christ evoked in him a strong desire to live as a replica of Jesus Christ. As a result, after becoming an engineer. The college was started in the sacred memory of Thanthai Hans Roever.

Fr.Roever was a German missionary and Civil Engineer by profession and born of very rich parents at Roestock. Even as a small boy, the teachings of Jesus Christ evoked in him a strong desire to live as a replica of Jesus Christ. As a result, after becoming an engineer. To carry out his work after him, he formed the St.John Sangam and got it registered. But, unfortunately in 1947 he passed away leaving the orphanage with over 300 children. This status continued till 1981.

In June 1977, Dr K .Varadharaajen, present Chairman of St.John Sangam Trust, became the Secretary of the Sangam, and the present patron of the Trust Er. M.Arumugam, became the president of the sangam. Some of their friends became members of the managing Committee. Immediately, trouble started among their own friends, and the Sangam was on the verge of being dismantled through Civil and Criminal Court cases preferred by some of the friends with a criminal bent of mind. Thanks to the Grace of God, the Sangam stood as firm as a rock during the turmoil.

In 1981, the High School was started in the name of the beloved father and one by one with the grace of God the trust was able to start more than 25 educational and social welfare institutions. To further strengthen the administration and management the St. John Sangam was dissolved and the St.John Sangam was formed and registered in 1994. All the rights and liabilities have been transferred to the newly formed Trust. It is functioning as an independent body.

Dr K.Varadharaajen, Founder, became the Chairman of all the institutions and Managing Trustee of St.John Sangam Trust. Er.M Arumugam became the patron of the Trust. One among the Trust's institutions is Thanthai Hans Roever College Perambalur, which was started in 1985 with 49 students and two disciplines. It is purely a self-financing institution affiliated to the Bharathidasan University and approved by the University Grants Commission, New Delhi. It offers Job oriented under graduate courses such as Computer Science, Industrial Elctronics Commerce Business Administration, Mathematics, Physics, Microbiology, Biochemistry, B.C.A, And B.Litt,Post-graduate courses in Computer Science, Computer Application, Commerce, Microbiology and Information Technology.

It has well equipped library and laboratories and multi-terminal supporting pentium-IV server with Unix,Lan,WINDOWS with 300 terminals and well qualified teachers with dedicated spirit. Today the college has a strength of 3,200 students. The College is also encouraging cultural programmes and it has staged in various meets and won prizes. Equal importance is given to N.S.S programmes and Sports & Games activities.