Karl Joseph O'Callaghan APM (born 1956 in England) served from 2004 to 2017 as Commissioner of the Western Australia Police.
He was promoted from Senior Sergeant to Superintendent in 1996 and was transferred to the Internal Investigations Unit and later ran both the Wheatbelt (formerly Northam) and South East Metropolitan (formerly Cannington) policing districts.
In 2001 he was promoted to Assistant Commissioner, Strategic and Corporate Development (formerly Policy, Planning & Evaluation) assuming responsibility for major change, reform and information technology projects in the Western Australia Police.
This role included responsibility for the Strategic Plan and Annual Business Planning process, legislative reform, major IT-based business re-engineering projects, replacing the Radio Communications infrastructure (PMRN) together with management of Corporate Projects and major Corporate Reform and implementation of Royal Commission recommendations.
In 2006 he was made a Rotary International Paul Harris fellow for his work with communities in Western Australia.