Our team of multidisciplinary and highly experienced consultants are committed to providing expert health economics advice and insights.

Dominic Tilden
Dominic Tilden Director
Dominic Tilden is a health economist with over 20 years practical experience in the design, development and implementation of health economic evaluations.
Mia Mudge
Mia MudgeSenior Partner
Mia joined THEMA in 2007 and has worked as a consultant in health economics and outcomes research since 2003.
Suzi Cottrell
Suzi CottrellSenior Partner
Suzi began at THEMA in 2008 after working as a senior consultant and manager in health economics and outcomes research in the UK.
Dan Jackson
Dan Jackson Senior Partner
Dan has over 20 years’ experience in health economics, working in both Australia and the UK. He joined THEMA in 2009.
Koji Makino
Koji MakinoSenior Partner
Prior to joining THEMA in 2010, Koji worked as an evaluator on behalf of MSAC for the Commonwealth Department of Health and Ageing.
Nimita Arora
Nimita AroraSenior Partner
Nimita worked several years as a senior consultant and manager in health economics and outcomes research before joining THEMA in 2012.
Lara Aghajanian
Lara AghajanianSenior Partner
Before joining THEMA to pursue health economics in 2016, Lara gained extensive experience as a clinical pharmacist.
Will Sierakowski
Will SierakowskiSenior Partner
Will joined THEMA in 2016 where he has excelled in health economics evaluation and the development of reimbursement applications.
Carmel Guarnieri
Carmel GuarnieriSenior Analyst
Carmel is a market access professional with over 15 years consulting experience in Australia and the UK.
Elena Keller
Elena KellerSenior Analyst
Elena joined THEMA in 2023 after working as a health economist and data analyst in academia for over 5 years.
Sebastian Pyne
Sebastian PyneSenior Analyst
Seb joined THEMA in 2018 and has since contributed to both health economics and outcomes research projects for a range of therapeutic areas.
Joshua O’Malley
Joshua O’MalleyAnalyst
Josh worked as a Senior Value Analyst for a global healthcare value and market access consultancy before joining THEMA in 2020.
Tahlia Seage
Tahlia SeageAnalyst
Tahlia joined THEMA in 2021 and has since contributed to health technology assessments and reimbursement applications for a range of therapeutic areas.
Mia Ratkovic
Mia RatkovicAnalyst
Mia worked as a Data Scientist and Junior Economist before joining THEMA in 2022, having studied both Economics and Medical Science (Hons I).
Sahibnoor Singh
Sahibnoor SinghAnalyst
Sahibnoor joined THEMA in 2023 after completing her Bachelor of Science and Master of Public Health, specialising in Communicable Disease Control at the University of Sydney.
Fearghal Comaskey
Fearghal Comaskey Analyst
Prior to joining THEMA in 2024, Fearghal studied Microbiology and Bioinformatics, previously working in HTA in Ireland.
Ben Karnon
Ben KarnonAnalyst
Ben began at THEMA in late 2024 after completing his Master’s in Health Economics at the University of British Columbia and Bachelor of Economics with Honours in Public Health from the University of Adelaide.
Ella Bergstrom
Ella BergstromIntern
Ella joined THEMA in late 2024 and is currently completing a Bachelor of Economics and Bachelor of Advanced Studies majoring in Economics and Health at The University of Sydney.