Our Team


Julie Adams

Julie has spent over 20 years working in the management consulting industry focused on the oil and gas sector, including several years working at an international oil company. She currently holds a leadership position in the consulting firm Accenture, leading a global Resources and Energy Research team. Her career has involved a focus on strategic analysis, risk assessment and people development, as well as a deep understanding of the external factors which can drive and shape the development of any business or public sector organisation. Julie is actively involved in training and education in her current role, and has some experience of teaching early in her career, including a year spent teaching in Bordeaux, France. She holds a post graduate qualification in Information Technology and Business Studies, as well as a Joint Honours Degree in French and History from the University of Warwick.

Prue Barnes-Kemp

Prue has an established reputation in leading schools in challenging situations to ensure rapid improvement. She is the Chief Executive Officer and Senior Executive Head of the Opossum Federation, a collective of 4 primary schools based in East London serving over 2,000 students. Her national and international work for Opossum focuses on developing leadership strategy and skills and she regularly delivers DfE training, such as the National Professional Qualification for Headteachers. Prue is a trained coach and an experienced School Education Adviser, Professional Partner, and Headteacher Performance Management Appraiser. An accredited Safeguarding trainer, she has served as a member of the Waltham Forest Safeguarding Children’s Board. Prue is currently an Education Doctorate Candidate at the Institute of Education, University of London.

Trevor Edinborough

Trevor has many years of experience in the education sector and in school improvement, working across the public, private and charity sectors. He has worked extensively in the UK as well as internationally. He was a successful headteacher in two very different inner-city comprehensive schools and has had wide ranging experience in the delivery of local authority services at Assistant Director and Deputy Director levels. In addition, Trevor has significant international experience in the delivery of major education priorities and has a successful track record in the development and delivery of national government contracts. Having been instrumental in the progress the Trust as part of its Executive Team during its early years, Trevor has returned to Chair the GST Board.

Elian Fletcher

Elian Fletcher is a proven strategic communicator who has worked for high profile public organisations; devising corporate and consumer communications plans as well as leading teams to deliver them. She has a vast amount of experience in issues management within organisations that face sustained media, public and political scrutiny. She is currently Head of Communications for Radio 4 and BBC Sounds for the BBC, having previously worked as the BBC Communications Manager for News and Current Affairs and Chief Press Officer. Her experience in communications also includes working for the Metropolitan Police Service as a Senior Communications Officer and Corporate Press Office. As an Oxford English graduate, Elian is passionate about mentoring students from the most disadvantaged backgrounds to enable them achieve their goals.

Mike McCreedy

Mike has a career which includes over 30 years of public sector experience. In addition to this Mike has held senior roles at the Commission for Racial Equality and the BIG Lottery Fund. Now retired, Mike is currently a governor at a local sixth form college and a secondary school. For GST, Mike serves on the West Midlands Local Governing Board and draws on his experience on an Interim Executive Board to Chair the Stantonbury International School Improvement Board. Mike is dedicated to the GST vision and values.

Anne Powell

Anne has served as CEO and ex-officio Trustee since September 2017. Anne is a music graduate who found her vocation in teaching in the least affluent communities in East London. As a primary Head and then Executive Head, Anne has led and supported rapid and sustainable improvement journeys in several GST schools, primary and secondary. Her leadership saw two long-term underperforming schools speed from special measures to confidently outstanding. The first GST Head to become the CEO on the strength of her record, Anne presides over the further realisation of the Trust’s vision. She is driven by a belief that good exam outcomes are the corollary of a great education and not its sole focus.

Alexis Rose

Alexis has over twenty experience as a strategy consultant and director of operations. She is currently the Chief Operating Officer of BecomingX, an education social enterprise, building on her experience at Accenture where she held numerous senior roles including European Director of Operations for Accenture’s Strategy practice and Global Inclusion and Diversity Director. Alexis is also a qualified transformational coach and serves as the Chair of the Board of Trustees for a central London theatre charity. Passionate about inclusive culture and leadership, equality and personal development, Alexis uses storytelling to inspire others and works best when collaborating with leaders to drive change.

Mary Stiasny

Professor Stiasny OBE is the Pro Vice-Chancellor (International) at the University of London and Chief Executive of University of London Worldwide, which is responsible for the delivery of quality courses to 50,000 students on more than 100 study programmes in 190 countries. Her career in education has encompassed teaching at Holland Park School, training teachers at Goldsmiths, at Oxford Brookes and the University of Greenwich before moving to the British Council as Director of Education, Science and Society. From there she returned to higher education as Pro Director at the Institute of Education (IOE). Mary’s work focus is on international teaching and learning. She is a Commonwealth Scholarships Commissioner, Visiting Fellow of Goldsmiths and a Fellow of the College of Teachers.

Margaret Upama

Margaret is a retired teacher who taught at and was a member of the Senior Leadership Team of Church Mead Infant School, and was working at the school when it was rebuilt and became Riverley Primary School. Having been part of Riverley since it opened, Riverley is very close to her heart. She has served on and continues to be a member of the East London Local Governing Board to develop the school using her experience, skills and knowledge. Margaret’s experience ranges from working in Children’s Homes, to teaching in schools, to being a Professional Tutor at the University of East London.