Our Team


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.

Sarah Galvani

Sarah Galvani is Professor of Social Research and Substance Use at Manchester Metropolitan University. She has an international reputation for her research and practice development work. In particular, her early work around alcohol and domestic violence remains a significant contributor to the field of substance use research and theory development, as well as her subsequent work focussed on substance use in social work education and practice. Currently, her work focusses on research with groups of people using substances who are further marginalised. She is widely published and has served on a number of influential advisory bodies. She also has broad experience of corporate governance, having supported several charities as a trustee.

Martyn O'Donnell

Martin O’Donnell has a wealth of experience in the education sector having worked as a Head and Executive Head and is now the Executive Director of Parallel Learning. He has successfully led Secondary Maintained Schools, Special Schools and Alternative Provision and is driven by an absolute belief that all young people deserve the very best opportunities. He is passionate about developing staff and is proud to have nurtured new leaders who are now successful leaders in their own right. He has been a key driver for many local authority initiatives, in London, Essex and Kent, having led strategic partnerships, school improvement projects and system leadership initiatives.