Dr Jack Freestone

Dr Jack Freestone

Postdoctoral Fellow

PhD, Faculty of Medicine, UNSW Sydney  

Master of Public Health, University of Sydney

Bachelor of Arts, University of Sydney 

 

Medicine & Health
National Drug & Alcohol Research Centre

 

I am a Postdoctoral Research Fellow at the National Centre for Clinical Research on Emerging Drugs (NCCRED). I play a leading role in the stewardship of NCCRED’s Prompt Response Network (PRN), a nationwide, multisector and interdisciplinary network engaging more than 300 practitioners and 90 organisations contributing to drug monitoring systems across Australia. The PRN focuses on facilitating information exchange and supporting health-led, harm reduction responses to emerging drugs of concern.

Since commencing with NCCRED in July 2024, I have published multiple peer-reviewed journal articles on early warning systems in Australia, highlighting emerging drug-related issues and supporting timely, responsive harm reduction efforts. In collaboration with PRN colleagues and community-led organisations of people who use drugs, I am co-designing the Community Drug Reporting System—a platform that will enable individuals to self-report drug-related experiences into Australian monitoring frameworks in real time. This initiative aims to strengthen Australia’s capacity to rapidly detect emerging concerns and enable prompt, evidence-informed responses.

Prior to joining NCCRED, I held roles across community development, service delivery, program evaluation, and research within both non-government and government organisations. I was previously Manager of Drug and Alcohol and Sexual Health Programs at ACON, a community organisation focused on the health and wellbeing of lesbian, gay, bisexual, transgender and queer (LGBTQ+) communities in New South Wales. In this role, I led teams of peer workers and health promotion staff delivering a range of interventions, including outreach, clinical services, and sector capacity building.

Concurrently with my work at ACON, I completed my PhD at the Kirby Institute. My doctoral research examined sexualised drug use among sexuality and gender diverse populations and led to the implementation and evaluation of a peer-led service for gay and bisexual men who have sex with men. This work was supported by an NHMRC Partnership Grant.

My longstanding work in the community sector, particularly in peer-led service delivery, has shaped my ongoing research interests in lived and living experience representation across research and practice. In recognition of this work, I was awarded the Australian Institute of Illicit and Injecting Drug Users (AIVL) Peer Researcher Recognition Award in 2025.

I welcome opportunities to collaborate and supervise Honours, Masters, and PhD students. My areas of interest include sexuality and LGBTQ+ populations, substance use, peer-led interventions, harm reduction, drug-related early warning systems, and emerging or new psychoactive substances. I have a strong interest in qualitative and implementation research.

 

  • Journal articles | 2026
    Freestone J; MacDonald H; Kypri S; Clifford B; Siefried KJ; Ezard N, 2026, 'Exploring the Utility and Appropriateness of Dose Thresholds for Issuing of Public Drug Alerts on High‐Dose MDMA: A Qualitative Study', Drug and Alcohol Review, 45, pp. e70140, http://dx.doi.org/10.1111/dar.70140
    Journal articles | 2026
    Freestone J; Zhou C; Kypri S; Howes M; Ebdon E; Purcell L; Dessauer P; Beckers C; Chapman B; Weith S; Lamb M; Clifford B; Siefried KJ; Barratt MJ; Peacock A; Sutherland R; Doumany J; Gava P; Standfield M; Kavanagh R; Dicka J; Sidaway P; Farah B; Ezard N, 2026, 'Incorporating experiential reports provided by people who use drugs into drug-related early warning systems: benefits, risks principles and approaches', International Journal of Drug Policy, 147, http://dx.doi.org/10.1016/j.drugpo.2025.105098
    Journal articles | 2025
    Clifton B; Keen P; Trevillyan J; Sullivan N; Johnson K; Warner M; Taheny C; Ellis H; Freestone J; Allan B; Newham B, 2025, 'Strategies to achieve the UNAIDS 95% HIV diagnosis target in Australia: Insights from a multidisciplinary roundtable', HIV Medicine, 26, pp. 3 - 16, http://dx.doi.org/10.1111/hiv.70083
    Journal articles | 2025
    Freestone J; Kypri S; Schumann JL; Franklin E; Francis C; Barratt MJ; Peacock A; Sutherland R; Clifford B; MacDonald H; Ezard N; Fletcher K; Acheson L; Siefried KJ, 2025, 'The Emergence of Novel Benzodiazepines in Australia, Evidence, Alerts, Clinical Management and Harm Reduction—A Narrative Review', Drug and Alcohol Review, 45, pp. e70086, http://dx.doi.org/10.1111/dar.70086
    Journal articles | 2025
    Freestone J; Siefried KJ; Peacock A; Fletcher K; Barratt MJ; Sutherland R; Ezard N; Doumany J; MacDonald H; Kypri S; Acheson L; Clifford B, 2025, 'From environmental disasters to emerging drugs; a framework to understand, map and assess drug-related early warning systems', International Journal of Drug Policy, 145, pp. 104946, http://dx.doi.org/10.1016/j.drugpo.2025.104946
    Journal articles | 2025
    Freestone J; Storer D; Siefried KJ; Bourne A; Prestage G; Ezard N; Maher L; Stirling R; Xiao BJ; Murphy D; Degenhardt L; Hammoud M, 2025, 'Implementation and formative evaluation of a peer-led chemsex intervention targeting sexualised crystal methamphetamine and GHB use: the M3THOD study', Harm Reduction Journal, 22, pp. 181, http://dx.doi.org/10.1186/s12954-025-01329-2
    Journal articles | 2025
    Freestone J; Xiao BJ; Siefried KJ; Bourne A; Ezard N; Maher L; Stirling R; Degenhardt L; Varma R; Prestage G; Hammoud M; Varma R, 2025, 'Exploring experiences of talk therapies among gay and bisexual men seeking to reduce or abstain from using crystal methamphetamine in the context of chemsex', Drug and Alcohol Review, 44, pp. 711 - 722, http://dx.doi.org/10.1111/dar.13999
    Journal articles | 2025
    Siefried KJ; Hill P; Clifford B; Brown J; Camilleri A; Crawford S; Dessauer P; Dilkes-Frayne E; Freestone J; Gobeil J; Harrod ME; Hudson S; Hull P; Lenton S; Lyons T; Oh G; Peacock A; Pierce A; Sidaway P; Soderstrom J; Tzanetis S; Ezard N, 2025, 'Co-design of the Australian Prompt Response Network for a public-health focused intersectoral approach to information sharing on emerging drugs of concern', Frontiers in Public Health, 13, pp. 1521911, http://dx.doi.org/10.3389/fpubh.2025.1521911
    Journal articles | 2024
    Siefried KJ; Bascombe F; Clifford B; Liu Z; Middleton P; Kay-Lambkin F; Freestone J; Herman D; Millard M; Steele M; Acheson L; Moller C; Bath N; Ezard N, 2024, 'Effect of a Smartphone App (S-Check) on Actual and Intended Help-Seeking and Motivation to Change Methamphetamine Use Among Adult Consumers of Methamphetamine in Australia: Randomized Waitlist-Controlled Trial', Jmir Mhealth and Uhealth, 12, pp. e55663 - e55663, http://dx.doi.org/10.2196/55663
    Journal articles | 2023
    Freestone J; Ezard N; Bourne A; Brett J; Roberts DM; Hammoud M; Nedanoski A; Prestage G; Siefried KJ, 2023, 'Understandings, attitudes, practices and responses to GHB overdose among GHB consumers', Harm Reduction Journal, 20, pp. 121, http://dx.doi.org/10.1186/s12954-023-00857-z
    Journal articles | 2022
    Freestone J; Bourne A; Layard E; Prestage G; Murray J; Siefried KJ, 2022, 'Playing at the edges, navigating sexual boundaries, and narrating sexual distress; Practices and perspectives of sexuality and gender diverse people who use GHB', International Journal of Drug Policy, 108, pp. 103811, http://dx.doi.org/10.1016/j.drugpo.2022.103811
    Journal articles | 2022
    Freestone J; Mooney-Somers J; Hudson S, 2022, 'The sector is ready, and the community needs Australian alcohol and other drug treatment services to ask about sexuality and gender identity', Drug and Alcohol Review, 41, pp. 39 - 42, http://dx.doi.org/10.1111/dar.13367
    Journal articles | 2022
    Freestone J; Prestage G; Bourne A; Ezard N; Race K; Nedanoski A; Murray J; Siefried KJ, 2022, 'Controlling for pleasure and risk: The experiences of sexuality and gender diverse people who use GHB', International Journal of Drug Policy, 105, pp. 103747, http://dx.doi.org/10.1016/j.drugpo.2022.103747
    Journal articles | 2022
    Freestone J; Siefried KJ; Prestage G; Hammoud M; Molyneux A; Bourne A, 2022, 'Individual level peer interventions for gay and bisexual men who have sex with men between 2000 and 2020: A scoping review', PLoS ONE, 17, http://dx.doi.org/10.1371/journal.pone.0270649
  • Reports | 2025
    Freestone J; Franklin E; Broadbent E; Brown J; Harvey C; Barratt MJ; Lyons T; Camilleri A; Mason C; Ezard N; Clifford B, 2025, Emerging Best Practices in the Design and Dissemination of Public Drug Warnings, http://dx.doi.org/10.26190/unsworks/30774
    Reports | 2025
    Kypri S; Macdonald H; Broadbent E; Freestone J; Baird S; Clifford B; Siefried K; Ezard N, 2025, Prompt Response Network, Drug Alert Report Q1 2025, http://dx.doi.org/10.26190/unsworks/31225
    Reports | 2025
    Kypri S; Macdonald H; Siefried K; Broadbent E; Clifford B; Freestone J; Ezard N, 2025, Prompt Response Network, Drug Alert Report Q2, 2025​, http://dx.doi.org/10.26190/unsworks/31407
    Reports | 2025
    Kypri S; Macdonald H; Siefried KJ; Broadbent E; Baird S; Clifford B; Freestone J; Ezard N, 2025, Prompt Response Network, Drug Alert Report 2024, http://dx.doi.org/10.26190/unsworks/31298
    Reports | 2025
    Kypri S; Siefried KJ; Clifford B; Ezard N; Freestone J, 2025, Prompt Response Network, Drug Alert Report Q3, 2025​, http://dx.doi.org/10.26190/unsworks/31734
    Conference Presentations | 2024
    Freestone J; Xiao BJ; Siefried K; Bourne A; Ezard N; Maher L; Stirling R; Degenhardt L; Varma R; Hammoud M, 2024, 'Exploring service experiences among gay and bisexual men seeking to reduce or abstain from chemsex', presented at Australasian Professional Society on Alcohol and other Drugs (APSAD) Scientific Conference 2024, Canberra, Australia, 30 October 2024 - 02 November 2024, http://dx.doi.org/10.1111/dar.13943
    Preprints | 2023
    Siefried KJ; Bascombe F; Clifford B; Liu Z; Middleton P; Kay-Lambkin F; Freestone J; Herman D; Millard M; Steele M; Acheson L; Moller C; Bath N; Ezard N, 2023, Effect of a Smartphone App (S-Check) on Actual and Intended Help-Seeking and Motivation to Change Methamphetamine Use Among Adult Consumers of Methamphetamine in Australia: Randomized Waitlist-Controlled Trial (Preprint), http://dx.doi.org/10.2196/preprints.55663
    Conference Abstracts | 2022
    Freestone J; Ezard N; Brett J; Roberts DM; Murray J; Prestage G; Hammoud M; Siefried KJ, 2022, '"Sometimes I have a duty of care not to call 000": Reported practices, attitudes and factors influencing consumer responses to GHB overdose', in DRUG AND ALCOHOL REVIEW, WILEY, Vol. 41, pp. S64 - S64, https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000862018700111&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=891bb5ab6ba270e68a29b250adbe88d1
    Conference Presentations | 2021
    Freestone J; Siefried KJ; Bourne A; Hammoud M; Prestage G, 2021, 'Peer-led interventions addressing health and wellbeing for gay and bisexual men between 2000 and 2020: A scoping review', presented at Joint Australasian Sexual Health, HIV and AIDS Conferences, Virtual, 06 September 2021 - 09 September 2021

Alongside colleagues at ACON and the University of Melbourne, in 2025 Jack was awarded a Community Mental Health Drug and Alcohol Research Network (CMHDARN) Innovation and Evaluation grant to co-design an evaluation framework for M3THOD, a peer-led sexualised drug use intervention. 

 Peer Researcher Recognition award 2025, Australian Injecting and Illicit Drug Users League (AIVL)

My Research Supervision

Mr. Stassi Kypri

Stassi is a research assistant and doctoral student. He works mainly on NCCRED's Prompt Response Network. Stassi's doctoral thesis relates to illicit drug-related monitoring and early warning systems with a particular focus on non-prescribed ketamine use.