The Mumbai Police Commissioner is appointed by the Maharashtra State Government on the recommendation by the Establishment Board, which includes Additional Chief Secretary—Home department and other senior bureaucrats.

They transfer junior officials to positions where the politicians can make maximum illegal money.

He was also the first Indian to hold this position, as he succeeded Sir Frank Souter, the last British officer to head the Bombay police.

Wanjara was involved in the security arrangements for the visit of Lord Mountbatten, the last Viceroy of India, to Bombay in 1947.

Wanjara was awarded the King’s Police Medal in 1948 for his distinguished service.He join a duty on 1914.