Our associates

The expertise of Theemis Consulting is further supported by our associates, who are recognised at a national and international level for the work they have undertaken in criminal justice and healthcare settings.

Geoff Brennan

associate

Geoff is a registered nurse for learning disabilities and a registered mental health nurse. He has worked in various positions within mental health wards for more than 30 years, in clinical, educational and senior leadership roles. Between 2012 and 2016, he worked as a senior consultant completing independent reviews and independent homicide investigations, working with the service user-led charity Bright from 2014 until 2020 (including four years as CEO).

In 2012, Professor Len Bowers at King’s College London’s Institute of Psychiatry, Psychology and Neuroscience recruited Geoff to be clinical supervisor to the Safewards research trial and subsequent dissemination. Geoff has continued working on dissemination, with his most recent post supervising a project to introduce Safewards to care of children and young people’s services in the UK. Since 2014, Geoff has worked independently with several organisations on individual projects, including the recently formed Lived Experience Network.

Geoff has written numerous papers, chapters and is co-editor of a book on mental health. In 2020, the Royal College of Nursing Institute awarded Geoff the Mental Health Nurse of the Year in recognition of his work to make inpatient services safer and more therapeutic.

Dr Richard McMaster

associate

Richard has 18 years’ experience in planning, leading and delivering research and applied projects within nuclear, defence, healthcare, telecommunications, and emergency services domains. His work has focused on the optimisation of human performance and safety systems through pragmatic involvement at all organisational levels; this has seen him engaging with people from frontline/shop floor positions up to senior command/boardroom level.

Richard is a chartered ergonomics and human factors specialist with a particular interest in safety-critical systems. Since August 2020, he has worked as an independent consultant dividing his time between projects within the nuclear and healthcare domains. Richard has presented at international conferences and co-authored peer-reviewed journal articles, book chapters and a book on sensemaking in emergency response command and control.

Stephen Shaw

associate

Stephen has conducted many healthcare service reviews, investigations and adjudications throughout his time in the justice sector. Notably, Stephen was the Prisons and Probation Ombudsman between 1999 and 2010. Stephen has held senior roles across a wide range of high-profile areas and investigations. He chaired the NHS England-commissioned inquiry into learning disability services and led the Harold Shipman investigation which identified system-wide learning. He has been responsible for commissioning of healthcare service reviews in respect of more than 500 death in custody reviews and integrating the findings into overarching reports submitted to HMPPS and HM Coroner. Stephen was also responsible for leading the official inquiry into the Yarls Wood immigration centre fire (published as HC 1257).

Peter Burgin

Associate

An experienced investigator, with a public sector career spanning four decades. Peter has worked for inquiries and investigations into the Hillsborough disaster, Gosport War Memorial Hospital, issues raised by the former surgeon Ian Paterson, East Kent Maternity Services and issues raised by the David Fuller case.

Peter has extensive experience in securing evidence through formal and informal discussions at the most senior level, analysing the evidence and writing reports to enable system and organisational learning.

Dr Jane Ewbank

Associate

Jane has worked as an NHS Consultant Forensic Psychiatrist since 2002 across medium and low secure hospital settings, as well as with a community forensic team. As part of a multidisciplinary team, her work involves assessing and treating mentally disordered offenders as well as supporting non-forensic colleagues with risk assessments. This has involved working with patients who have committed serious violent and sexual offences, including homicides, some of whom are graduates from the high-secure hospital system, others being assessed and diverted from police custody or prison. She has extensive experience working with Ministry of Justice restricted patients in secure inpatient settings and following their discharge into the community.

Jane has been the MAPPA lead for her Mental Health Trust, working closely with police, probation and other agencies managing high-risk offenders in the community. She has significant experience with patients detained under the Mental Health Act, under civil and forensic sections, and has provided reports for court within her NHS practice and as an independent medicolegal advisor for solicitors and the Crown Prosecution Service. Her medicolegal assessments have covered issues including diminished responsibility, insanity and dangerousness and have involved making sentencing recommendations to courts, including giving oral evidence.

Building on her forensic experience, Jane has undertaken work for the Prison Service doing psychiatric assessments and reports for parole board hearings on life sentenced and IPP prisoners where there are significant mental health issues contributing to release decisions. She has been commissioned by HM Coroner to provide psychiatric reports to assist the coroner in cases of deaths in Broadmoor High Secure Hospital and provided oral evidence to the coroner’s hearings.

Margaret Obi

Associate

Margaret is a former partner in a leading criminal defence practice, where she specialised in serious crime, including murder, manslaughter and terrorism offences. She is also the author of two textbooks on prison law. In 2014, she left private practice to become an independent legal consultant.

In February 2023, Margaret was appointed as the first Commissioner for Service Police Complaints. In this role, she provides independent oversight of the Service Police (Navy, Army, and Air Force) complaints system, makes recommendations to improve policing practice and independently investigates the most serious and sensitive cases which may include deaths in custody.

Margaret’s other work includes:

  • Advising international legal teams defending allegations of war crimes in the International Criminal Court and disputes between states in the International Court of Justice.
  • Advising and chairing various statutory bodies as an independent Legal Assessor or Legally Qualified Chair.
  • Trustee/Director of Appeal, a charity and law practice dedicated to fighting miscarriages of justice and advocating for reform of the criminal justice system.
  • Chairing safeguarding panels on behalf of the cricket regulator.

Margaret was appointed as a Deputy High Court Judge in 2018 and an Acting Judge of the Supreme Court of the British Indian Ocean Territory in 2023.