After a bomb throwing incident in Lok Sabha Chamber, the Central Legislative Assembly on 8 April 1929 set up a 'Watch and ward committee' on 3 September 1929.

The Sergeant at Arms (Colin Keppel) was designated as Controller while another 25 officials were drawn from the Delhi Police for deployment in Gallery, Meanwhile, a Watch & Ward Officer was appointed to administer the directions of the speaker under the guidance of the secretary general.

Being the In-House security service, its prime approach revolves around the principles of Access Control, based on proper authorization, verification, identification and authentication of human and material resources entering the Parliament House Complex with the help of modern security gadgets.

It also coordinates between the Bureau of Civil Aviation Security, the Delhi Police, Airport Security for the collection of the ballot boxes, containing ballot papers of respective state legislature, from the Airport, its safe transportation under armed guards from Airport to Parliament House where it is placed in safe custody under the aegis of the Returning Officer under lock and key under the protection of round the clock armed guards After the completion of the counting and declaration of the result, the ballot boxes are duly returned to the Election Commission.

Having expertise in identification of members of Parliament, the department calls on PSS Officers for assistance to identify during VVIP functions.