Martin Earwicker (2001–06): Chief Executive from its creation in 2001, until he left in 2006 for the Science Museum.[10] Dr Frances Saunders (2006–11): took over as acting Chief Executive in May 2006[11] and was appointed as Chief Executive in August 2007.[12][13] On 29 June 2011, Saunders announced to staff that her post had been advertised and that she would not be applying.[14] Jonathan Lyle (2012–17): formerly Director of the Programme Office at Dstl, placed into an acting role and was appointed in March 2012.[15] David Marsh: acting Chief Executive from September 2017 to January 2018.[16] Gary Aitkenhead[17] (2018–2021).[16]