Mahadeva married Meenambi Ammai, daughter of Chelliah Pillai.
[1] After leaving school Mahadeva joined the Public Works Department (PWD) in 1910 as a draughtsman.
[1] Two years later he moved to the PWD's Technical Services department.
He was also placed in charge of the newly created Water Works Branch of the PWD.
[1] Mahadeva was appointed Assistant Director of the PWD in 1944.