He specialises in digital technologies, literacy, multimodality, international development and HIV education and prevention. Walsh was central researcher on number of highly competitive grants awarded by The Spencer Foundation, The American Foundation for AIDS Research (amfAR), the Australian Research Council (ARC) and the Australian Federation of AIDS Organisations (AFAO) and the European Commission. Currently, he also works as a Senior Research Analyst and Policy Advisor for the Bridges Across Borders South East Asia Community Legal Education Initiative (BABSEA CLE). He is also the co-founder and co-facilitator of The HIVe.