[4][6] By 2003, he has risen to become the area commander of North West Surrey in the rank of chief superintendent.

[5] In addition to leading the City's police, he was head of the National Fraud Intelligence Bureau.

He retired on 31 December 2015 and was succeeded by the force's Assistant Commissioner, Ian Dyson, QPM.

[11] Leppard is a member of the international advisory board of Black Cube,[12] a private intelligence agency with offices in Tel Aviv, London and Madrid.

Leppard was appointed Commander of the Order of the British Empire (CBE) in the 2016 Birthday Honours for services to policing and the prevention of economic crime.