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Senior management team

  1. Picture of Lesley Longstone

    Lesley Longstone

    Chief Executive and Registrar

    Lesley has worked in a variety of fields including employment, education, youth and criminal justice in both national and international contexts. She has recently completed periods as Interim Chief Executive of the Crown Prosecution Service and was previously Chief Executive of the Independent Police Complaints Commission.

    Lesley is also Deputy Chair of Ambitious about Autism and Chair of the Ambitious about Autism Schools Trust.

  2. Picture of Marcus Dye

    Marcus Dye

    Acting Director of Strategy

    As Acting Director of Strategy, Marcus is responsible for our Policy, Standards and Communications functions as well as overseeing our CET operations.

    Marcus has over 20 years’ experience working in healthcare regulation in a range of roles in education, standards and public and patient engagement. He has overseen reviews of professional standards at the GOC and other regulators, taking account of the learning from national healthcare reviews. He has held previous roles in the commercial finance sector focussed on process redesign and corporate training. At the GOC he is advocate for LGBTQ+ issues within healthcare regulation and is the sponsor of our LGBTQ+ staff group.


  3. Picture of Leonie Milliner

    Leonie Milliner

    Interim Director of Education

    As Interim Director of Education, Leonie is responsible for advising Council on pre-and post-registration education and training for optical professionals and the implementation of the Education Strategic Review (ESR) and Continuing Education and Training (CET) strategic review.

    Previously, Leonie was the Chief Executive of the General Osteopathic Council and of the UK Voluntary Register of Nutritionists. She is also a longstanding lay member and team leader of the General Pharmaceutical Council Accreditation Panel, and a lay member of the Chartered Institute of Legal Executive's Qualifications Committee. Leonie also served as a member of various education bodies, including the Office for Students Teaching Excellence Framework Panel and as the employer representative for the 2016 Quality Assurance Agency Subject Benchmark Statement for Agriculture, Horticulture, Forestry, Food, Nutrition and Consumer Sciences.

    Leonie has served on boards and committees of various charities and public bodies in the education, health and architect sectors. An architect by training, she worked in private practice in London designing social and private housing. In 2004, she was promoted to head up the Royal Institute of British Architects Professional Services Ltd. She lives in her own self-build 'grand design' in Islington, London.

  4. Yeslin Gearty

    Acting Director of Resources

    As Acting Director of Resources, Yeslin is responsible for the Finance, Human Resources, IT and Facilities teams, along with the Registration Department.

    Yeslin has a broad mix of experience in senior management posts, including working as a Commercial Director in a sales driven corporate environment. He has over 20 years’ experience in central Government, both as a leader of large operational areas and in change and programme management, with extensive involvement in identifying and managing the impact of change in a variety of commercial and public sector organisations, helping redesign and improve them from the ground up.

  5. Picture of Dionne Spence

    Dionne Spence

    Director of Casework and Resolution

    As Director of Casework and Resolutions, Dionne is responsible for our fitness to practice, hearings and in-house legal functions including illegal practice.

    Committed to the public and not for profit sectors, she has extensive experience in leading a variety of large multi-disciplinary teams to deliver against challenging corporate objectives, holding senior leadership roles within the Financial Ombudsman Service, the Prison and Probation Ombudsman, HM Inspectorate of Court Administration and HM Courts Service.  Her key achievements have included co-leading the first inspection of the Military Court Service, driving forward policy improvements for the treatment of transgender prisoners in the high security estate and developing successful strategies to improve performance across various casework roles.

    An active volunteer in her local community, Dionne has been a Brownie Guide leader for the last nine years.