The SOSIA logo illustrates the Office’s foundation and focus. It comprises the symbol and the name depicting the true nature and origin of the Office. The Sun depicts brightness that serves as beacon of the industry.The Shield shows the protective nature of the industry with the term “Steadfast” below the symbol of the security guard which means loyalty and unwavering devotion to his duty.The three (3) stars represent the three (3) main Islands of the Philippines, namely Luzon, Visayas and Mindanao. The Laurel leaves symbolizes peace which the security guard helps enforce the rules and regulations in accordance with policies and guidelines.
On 01 June 1969, Republic Act 5487 otherwise known as the “Private Security Agency Law” was enacted making the Philippine Constabulary as the sole authority to provide administrative services and general supervision over the management and operations of all organize Private Security Agencies (PSAs), Company Guard Forces (CGFs), Government Security Forces (GSFs) and their security guards. As such, the control of Government Security Forces was removed from the NICA. In 04 August 1969, a staff memo was issued by Headquarters, Philippine Constabulary (HPC), organizing the Philippine Constabulary Security and Investigation Agency Supervisory Office (PCSIASO) and later renamed to PC Supervisory Office for Security and Investigation Agencies (PCSOSIA). And pursuant to GO No. 404 dated 29 June 1970, the office was renamed to PC Supervisory Unit for Security and Investigation Agencies (PCSUSIA).
Pursuant to Memorandum 07-S96 dated 31 May 1996 the Security Agencies and Guards Supervision Division (SAGSD) was created as one division under the Civil Security Group (CSG) to exercise supervisory authority and implement the Rules and Regulations embodied in RA 5487.
On Sep 25, 2009, SAGSD was renamed as the Supervisory Office for Security & Investigation Agencies (SOSIA) thru General Orders #DPL-09-10.
NAPOLCOM RESOLUTION 321 dated 24 Nov 2010 approved GO# DPL-09-10 entitled “confirming the Restructuring of the PNP CSG”.