Siân Maddrell is the Regional Director for our secondary schools in South London and Hastings. Siân is a successful school leader with more than 25 years’ experience. Previously, she was Headteacher of The Grey Coat Hospital for eight years.

Matt Jones has been Principal of Ark Globe Academy (an all-through academy) since May 2012. In his first full year as Principal the academy achieved its best ever outcomes for children in all Key Stages; most notably in Year 6 where 100% of children achieved level 4 plus in reading and mathematics and in Year 11 where the academy attained a 7 percentage point increase in the proportion of students achieving 5 A*-C grades including English and mathematics.

Prior to his appointment Matt was Deputy Principal at Oasis Academy Hadley in Enfield, another all-through academy for 4-18 year olds, which he and his colleagues made one of the fastest improving schools in London. Matt has an Honours BSc in Social Science and Politics and is a graduate from the 'Future Leaders' programme. 

Jacqueline Russell joined the Ark family over ten years ago. She initially worked at Future Leaders as COO, now part of the Ambition Institute, prior to becoming CFO of Ark in 2017.

Prior to joining Ark, Jacqueline had experience of a variety of sectors including hospitality, retail and lottery. She was Finance Director of Geronimo Inns, The Conran Shop, and the inaugural Finance Director of the South African National Lottery, a role she held on secondment from the Camelot Group.

Jacqueline is Chair of Governors for Ark Globe Academy. She is also a trustee for CST, the national organisation and sector body for School Trusts in England and a member of their Finance and Resource Committee. 

Jacqueline qualified at Price Waterhouse and is a Fellow of the Institute of Chartered Accountants.

Samantha Colburn is Head of Primary of Ark Globe Academy, an all-through school in Southwark which opened in 2008.