• Ross Bell - IDPC Board member - Chair

    Ross Bell is Executive Director of the New Zealand Drug Foundation, a position he’s held since 2004. The Drug Foundation is New Zealand’s leading alcohol and other drug policy advocacy charity, which was a founding member of IDPC. Ross has held advisory and governance roles with IDPC since its formation. Prior to his role at the Drug Foundation, Ross was involved in social policy advocacy and worked for New Zealand’s Ministry of Foreign Affairs and Trade. Ross holds degrees in international aid and development.

  • Alison Holcomb - IDPC Board member - Vice Chair

    Alison Holcomb is the director of the ACLU Campaign for Smart Justice. She joined the ACLU from its Washington state affiliate where she served as Drug Policy Director, Criminal Justice Director, and the primary drafter and campaign director for marijuana legalisation Initiative 502, passed by voters in 2012. Prior to the I-502 campaign, Alison’s work included successfully advocating for legislative and regulatory improvements to Washington’s medical marijuana law, adoption of the second 911 Good Samaritan overdose prevention law in the nation, and creation of Seattle and King County’s groundbreaking Law Enforcement Assisted Diversion (LEAD) programme.

    Website: https://www.aclu.org/bio/alison-holcomb

  • Donald MacPherson - IDPC Board member

    Donald MacPherson is the Executive Director of the Canadian Drug Policy Coalition and  one of Canada’s leading figures in drug policy. He advocates policies based on principles of public health, human rights, social inclusion, and scientific evidence and moving away from a criminal justice paradigm where people with health problems are criminalised.

  • Julita Lemgruber - IDPC Board member


    Julita Lemgruber is a Brazilian sociologist who has held different positions in public service. Among these she has been the General Director of the Prison System and the Police Ombudsman, both in the State of Rio de Janeiro, and a member of the National Council for Criminal and Penitentiary Policy in the federal government. Ms. Lemgruber is presently the Coordinator of the Center for Studies on Public Security and Citizenship at University Cândido Mendes.

  • Kathryn Leafe - IDPC Board member

    Kathryn has extensive experience in health and criminal justice, including the early development of UK prison drug treatment, and community criminal justice based interventions. She has co-authored a number of programmes and practice guides including those for HM Prison Service (UK) and Best Practice Guide to providing Drug Services in Prison (UNODC). She has been a social work and business studies lecturer and a consultant and trainer for EU and UNODC programmes across Eastern Europe and Central Asia. Kathryn was appointed Chief Executive of CareNZ in 2013.

  • Dr. Mary Chinery-Hesse - IDPC Board member


    Dr. Mary Chinery-Hesse, a retired International Civil Servant who worked at the UN as Resident Coordinator and UNDP Resident Representative. She was then appointed as the Deputy Director-General of the International Labour Organization, with the rank of Under Secretary-General of the United Nations. She also served as the Chief Advisor to the President of the Republic of Ghana. She currently serves on the African Union Panel Of The Wise, and is a Commissioner of the West African Commission on Drugs.

  • Valentin Simionov - IDPC Board member

    Valentin Simionov is the executive director of the Romanian Harm Reduction Network. He entered the harm reduction field in 2004, as an outreach worker. He studied philosophy and social work. Starting in March 2014, he has been part of the IDPC Board and the Strategy Sub-committee.

  • Vicki Hanson - IDPC Board member

    Vicki Hanson is a member of the Cannabis Commercial and Medicinal Research Taskforce (CCMRT), and a Committee Member of Ganja (Future) Growers & Producers Association. Vicki is the Secretary of the St. Catherine Ganja Growers and Producers Association. Vicki Hanson is also a PhD Candidate in Public Policy at the Department of Government, University of the West Indies (Mona). Her research work is aimed at exploring the public policy issues to be resolved in establishing a legally regulated cannabis (ganja) industry in the Caribbean, using Jamaica as the case study.