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Our Trustees form a Council with overall responsibility for running the GDST. They oversee strategy, financial stability, policies and procedures and monitor our key performance indicators. They each also have a small number of our schools in their remit, which they support by providing insight into our plans and activities at a national level.

Juliet Humphries


Juliet was educated at both Sutton and Wimbledon High Schools. Following a law degree at Leicester University she qualified as a solicitor.

Juliet joined Linklaters and rose to become global Director of Knowledge. She then set up her own consultancy specialising in knowledge management and working with law firms and other organisations in the UK, Europe and the US. At Bird & Bird she set up an associate and partner training programme.

Before becoming a Trustee Juliet was Chair of the Local Governing Board of The Belvedere Academy and also a Governor of Wimbledon High School.

Tom Wheare

Deputy Chair

Tom Wheare studied history at King’s College, Cambridge and gained a Dip. Ed. at Christ Church, Oxford.

He taught at Eton for nine years before becoming Housemaster of the School House at Shrewsbury. He was then appointed Headmaster of Bryanston, a post he held for 22 years.

Tom was an active member of HMC (the Headmasters’ and Headmistresses’ Conference) and has served as its Treasurer and Chairman. He has been a governor of eight prep schools and is presently a governor of one. He was also a member of the Executive Committee of AGBIS (the Association of Governing Bodies of Independent Schools).

Tom joined the GDST Council in 2006. He also serves on the Senior Appointments and Remuneration Committee.


Helen Williams CB

Deputy Chair

Helen Williams joined the Department of Education and Science with a history degree from Oxford.

Postings included national education planning, schools funding and departmental management.

Following promotion to the Senior Civil Service, Helen’s work included the early development of the National Curriculum. After other senior Whitehall assignments she returned to the Department for Education and served as Director of School Organisation and Funding; Director of Primary Education and e-Learning; Director, School Standards; and finally, Director of the School Curriculum and Pupil Well-Being in which role she was responsible for the national effort to improve the take up of STEM subjects beyond 16, particularly by girls.

Helen is also Chair of Governors of a North London secondary Academy.


Julie Chakraverty


Julie Chakraverty has served as an independent director on the boards of a number of listed companies within the financial services and retail sectors.

During her executive career, Julie was a board member of UBS Investment Bank where she held a number of global leadership positions. Her flagship “CreditDelta” portfolio product won industry awards every year between 2001-2009. She also worked for the investment bank JP Morgan.

In 2006 Julie was named in Management Today’s ‘Top 35 Women Under 35’. In 2013 she was recognized in The Times as the youngest female director of a FTSE-100 company, aged 41.

Julie has served on the board of the Specialist Schools and Academies Trust. She actively supports younger women in realising their full potential. Julie graduated with a first-class Economics degree from St John’s College, Cambridge.


Kathryn Davis


Kathryn spent 26 years (17 of them as a corporate/commercial partner) with city law firm Slaughter and May before retiring in 2013.

During her career, Kathryn spent much of her time dealing with strategic issues for a range of FTSE 100 and FTSE 250 companies.

Kathryn has non-executive experience as a Director of Thames Valley Housing Association and as a governor of Paddington Green Primary School. Kathryn also acts as an independent panel member, recruiting magistrates for the Ministry of Justice.

At Slaughter and May she was extensively involved in recruitment, training and professional development activities and the mentoring of younger lawyers, most of whom were women.


Rita Dhut


Rita worked as a fund manager in the City for over 20 years and now acts as an advisor through her own company to Board and Investment Committees of fund management firms on risk and governance.

Rita spent over ten years at Aviva Investors, during which she became involved in mentoring A Level students and supporting local schools.

She is a trustee of All Change, a charity promoting the role of art in bringing change to underprivileged individuals and communities.


Kevin Gibbons


Kevin began his career as a chartered architect in Glasgow, moving into major project management first for the NHS at Oxford Regional Health Authority and then in private practice for large London consultancies.

His projects cover healthcare, higher and secondary education and pharmaceuticals.

He is Director of Property & Facilities at City University London, a role encompassing all aspects of the physical environment of the University including property transactions, energy and environment, capital projects and facilities management. Kevin is a member of the University Executive and is principal author of the University’s Estate Strategy 2012-2017. In 2013 he was appointed a Design Council CABE Built Environment Expert.


Masha Gordon


Masha Gordon is a seasoned investment professional with nearly two decades of experience managing money in capital markets.

During her executive career, Masha was a Managing Director of Goldman Sachs and most recently led the emerging markets portfolio management team at PIMCO. She was named among “Top 40 under 40 in Asset Management Industry”  and ‘Rising Stars in Finance” by Financial News.

She moved to a portfolio career of non-executive board appointments in 2014 and currently serves as an independent director of Alrosa, world’s largest diamond company and Moscow Exchange. She is also a Vice Chair of the Board of Advisors for the Fletcher School of Law and Diplomacy at Tufts University and a member of the investment committee of the EDP Programme at Oxfam UK.

She actively supports development of grit and resilience in young women through charitable programs of GRIT&ROCK, a charity she founded after setting two world records in the Explorers Grand Slam and 7 Summits becoming the fastest woman to complete both.  

Masha gained a BA in Political Science from the University of Wisconsin and a MA in Law and Diplomacy from The Fletcher School at Tufts University. 

Joanna Greenslade


Jo was educated at a broad range of schools in the UK and overseas and has a degree in PPE from Somerville College, Oxford. 

She is a qualified chartered accountant and has a Securities Institute Diploma in Corporate Finance.

She is managing director of and a shareholder in Barwood Capital (BCL), a private UK real estate investment and development business. BCL has around £100m invested in commercial and residential property assets and has delivered an average project equity return of 30% p.a. to date.

Jo qualified with Ernst & Young in London and moved to its Corporate Finance Advisory department. She joined the Reuters Group in 2006 where she built and led an in-house mergers and acquisitions team and subsequently worked as Finance Director of one of Reuters’ four global divisions.


Richard Harris


Richard read chemistry at Worcester College, Oxford and is a graduate of the Advanced Management Programme at INSEAD, France.

He trained as a chartered accountant, spending 18 years at Price Waterhouse, in London and Southampton, eight of which were as partner. He subsequently spent 11 years in finance and industrial management roles at two FTSE100 companies, GKN plc and Brambles Industries plc.

Since 2007, Richard has held a number of senior roles within the health sector, including positions at NHS Trusts. He has also been a governor of several schools, was governor of the North East Worcestershire Further Education College and served a term of office as a founding governor of the RSA Academy in the West Midlands.

Mary Hockaday


Mary, an alumna of Oxford High School GDST, is currently Controller BBC World Service English, and has held a number of other senior roles at the BBC including Head of BBC Newsroom and Editor BBC World Service News.

These roles have involved the creation and implementation of significant strategic plans, team building and managing changing technology and audience expectations, while ensuring a commitment to the Nolan principles of public service.

Mary has attended events at OXford High School and has spoken to the Sixth Formers there.