Mr Livingstone has overall command and responsibility for the Police Service of Scotland and was appointed Chief Constable in August 2018, having been Deputy Chief Constable since December 2012 and having served as Interim Chief Constable from September 2017.
Before the establishment of Police Scotland, Mr Livingstone was Assistant Chief Constable for Crime at Lothian and Borders Police, having joined the legacy service in 1992.
Mr Livingstone served in Edinburgh and West Lothian as a patrol officer, detective, and as head of criminal investigations. Over the course of his career, he has commanded numerous major investigations and international events.
During his 28 years in policing, Mr Livingstone has undertaken external attachments to the Police Ombudsman for Northern Ireland as a senior investigator in 2008, and to Her Majesty's Inspectorate of Constabulary.
He is active across the public sector and sat on the Scottish Sentencing Council, and continues to sit on the Independent Steering Group for Operation Kenova on Northern Ireland.
Before entering policing, Mr Livingstone worked as a solicitor in Glasgow, Edinburgh and London having graduated in law from the Universities of Aberdeen and Strathclyde. A Fulbright Scholar, he also graduated with a master's degree from John Jay College of Criminal Justice, City University of New York.
In 2015 he was awarded the Queen's Police Medal.
Mr Livingstone took up the role of DCC Designate during May 2016 and was appointed as Police Scotland's Chief Constable in August 2018.