We have now narrowed down the untraced list to just 25. Here they are:
CIVIL
Ameer Batcha, A
Archunan,K
Gunasekaran,R
Alagarsamy,B
Pawan Kumar Sharma
Ravichandran,V
Sekar,R
Selvaraj,K
Veerakumar,V
MECHANICAL
Jagadeeswaran,R
Jayasankar
Kathiravan,M
Lakshmanan,A
Rajasekaran,D
Rajeswaran K
Sivakumar,D
Sridhar,K
Thamaraiselvan,M
Vallinayagam,A
Venkatachalam,O
Vijayalakshmi,H
ELECTRICAL
Azhaguvel
Reginald Thileepan,S
Saravanan,M.G.
Sridharan,V
Need your help to trace them all.