Overall responsibility for Zebe — product, science, commercial direction, and operations. Previously built Sodexo’s €320m service operations across 33,000 sites over two decades scaling global businesses. OECD speaker on Quality of Life.
Qualifications
Bachelor of Applied Science(Psychology)
Graduate Diploma of Psychology (Advanced)
Master of Applied Psychology (Clinical)
Doctor of Philosophy (Clinical Psychology) – current
Professional associations and memberships
AHPRA registration: PSY0002268469
Publications
Demmer, D. H., & Tatnell, R. (2025). Readiness assessments prior to gender-affirming medical care: The processes and perspectives of Australian healthcare practitioners. International Journal of Transgender Health, 1–16. Link here
Tatnell, R., Constanti, A., Johansen, S. W. F., & Demmer, D. H. (2025). A mixed-methods pilot study assessing adaptations to the ESTEEM program for Australian same-sex-attracted men. Australian Psychologist, 1–12. Link here
Joint United Nations Programme on HIV/AIDS (UNAIDS). (2024). Chemsex Toolkit for clinical service providers in the Asia-Pacific region. UNAIDS. Link here
