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Meet our leaders

The CST Education Executive Team comprises our Chief Executive, Chief Operating Officer, two Primary Regional Directors and the Director of Secondary Academies.

The Regional Directors and Director of Secondary Academies line-manage the Trust’s headteachers and provide support and challenge for their schools on their journey to outstanding or beyond. They visit the schools and meet with senior and middle leaders on a regular basis and broker specialist support as required.

Education Executive Team

  • Andy Yarrow

    Chief Executive

    Andy Yarrow

    Former Headteacher Andy joined CST in March 2017 having spent three and a half years at Oasis Community Learning as a Regional Director for the London and South East Region. During this time, he was responsible for primary, secondary and all-through academies, including Fresh Start and converter academies and newly established free schools. Prior to joining Oasis in 2013, Andy was Founding Principal of Chelsea Academy and Headteacher at Hornsey School for Girls in Haringey. Both schools achieved outstanding Ofsted judgments during his tenure.

  • Sheila McKenzie

    Chief Operating Officer

    Sheila McKenzie

    Sheila joined CST as Finance Director in February 2014, becoming COO in November 2017. A qualified accountant with 15 years’ experience in the voluntary sector, Sheila’s previous roles include senior finance positions at an organisation that supports people with learning difficulties, and a membership organisation that supports the NHS. Sheila also acts in a voluntary capacity as trustee of SOS Sahel UK, a small international development charity that works primarily in Sudan, and the National Deaf Children Society.

  • Karen Walker

    Regional Director, Primary, London and Thames Valley

    Karen Walker

    Karen oversees CST’s six primary schools based in London, Reading and South Oxfordshire. She has played a pivotal role in rapidly improving schools under her care, and leading work on primary assessment across the Trust. An experienced educationalist, Karen has worked with a variety of different agencies, local authorities and communities of schools on all aspects of school improvement. With a background in primary headship, Karen is also a trained coach and mentor for school governors through the National College and an accredited School Improvement Partner.

  • Colin Sinclair

    Director of Secondary Academies

    Colin Sinclair

    Colin has recently joined CST and has responsibility for the professional governance of our five secondary schools. He is a highly experienced leader, having spent the past 10 years as a Headteacher, Executive Headteacher and Regional Principal raising standards in a range of educational contexts – including all-through schools. Colin is a trained Ofsted inspector and has recently embarked on a part-time Doctorate of Education programme.

  • Marie-Claire Bretherton

    Regional Director, Primary, East Midlands

    Marie-Claire Bretherton

    Marie-Claire is the Regional Director for CST’s five primary schools based in and around Lincolnshire, and the Executive Headteacher at one of those schools - Mount Street Academy. Mount Street is the lead school for the Kyra Teaching School Alliance, a partnership of over 50 schools focused on their collective improvement and ambition for all children. Kyra is also a Research School, working in partnership with the EEF across the East Midlands. In addition to being a National Leader of Education, Marie-Claire chairs the Lincolnshire Teaching Schools Together board, a coalition of six teaching schools working to secure transformation school improvement in Lincolnshire school.

    CfBT Schools Trust is a charity and a company limited by guarantee. Registered in England & Wales. Company No. 7468210.