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Meet the Leadership Team



Donna Moffatt is a Director of Matrix, helping found the organisation in 1999. Her career began in Social Work and she has worked in mental health for both statutory and voluntary sectors. Donna has been a qualified independent advocate for over 15 years. Although no longer a practicing advocate, Donna remains passionate about ensuring the rights of service users are upheld and their voices heard. Donna oversees the company accounts and budgets, has HR responsibilities and general admin duties.



Tony Roddis is the founder & a director of Matrix SDT. His background includes work with adolescents with behavioural & emotional difficulties, mental health & the homeless, counselling & psychotherapy. He has developed mental health services across the UK & the European Union advising emerging European democracies on community mental health systems & human rights. He has addressed two World Mental Health Conferences on mental health issues and provides supervision support for Matrix employees.



Ian Grimwood is a director of Matrix SDT. He is a Physics graduate from Imperial College and began working in mental health over 25 years ago. He has mostly been an advocate, working with multiple client groups. He is passionate about ensuring that people’s voices are heard in decisions that affect their lives. As well as line manging advocates, he provides contract management and practices as an IMCA in Slough (including DoLS, RPR and LF) as well as Care Act Advocacy in Surrey prisons.

Meet our Advocates

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Who are Matrix SDT?

Excellence in mental health advocacy services across the

South East of England

Matrix Service Development & Training Ltd. was founded in 1999 by Tony Roddis and Donna Moffat, joined by Ian Grimwood. Between them the three directors have over 60 years experience working in mental health.

Matrix provides high quality mental health advocacy services across Surrey and Berkshire for NHS trusts and independent mental health services.


Matrix provides advocacy services at a range of hospital sites and in the community. This independent service offers professional support to client groups such as adults with mental health problems, learning disabilities, drug issues, and older people with mental health problems in in-patient and community contexts.

Matrix is a not-for-profit company limited by guarantee.


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