Born in Middlesbrough in 1967, Greg attended the local St Peter's Comprehensive, South Bank. He went on to study Economics at Magdalene College, Cambridge University and was awarded his PhD at the London School of Economics.
Greg was Special Advisor to the Secretary of State for Trade & Industry - the Rt Hon Ian Lang MP - from 1996 until the General Election in 1997. Subsequently, he was appointed the BBC's Controller, Commercial Policy.
In May 2010, Greg was appointed Minister of State at the Department for Communities and Local Government and in July 2011 he was appointed Minister for Cities. In September 2012, Greg was appointed Financial Secretary to the Treasury before becoming Minister of State in the Cabinet Office in October 2013 and, latterly, Minister for Universities, Science & Cities in July 2014.
Following the General Election, Greg was promoted to Secretary of State for Communities & Local Government in May 2015. In July 2016 Greg was appointed Secretary of State for Business, Energy & Industrial Strategy.