Professionalising Investigation Programme (PIP) 3: Major crime and serious and organised crime

A PIP 3 Investigator is more commonly referred to as a Senior Investigating Officer (SIO).

The role of an SIO is to lead investigations for major crime or serious and organised crime investigations. This includes those that are reactive, proactive or crimes in action.

Find out more in the role profiles:


This programme is licensed to a small number of forces and law enforcement agencies for local delivery. It is also delivered nationally from College of Policing premises, for further information see course details.

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