Marcena is a Senior Analyst at the Global Initiative Against Transnational Organized Crime, which she has been with since 2012. While Marcena’s work has covered a wide scope of material and geographic spread, her current work has focused on gold-related crime, other mineral resources, illicit financial flows and development responses to organized crime. Marcena is also currently a Research Fellow and PhD candidate at the University of Queensland, Sustainable Minerals Institute. Marcena past work includes analysing migration flows, access to justice, and gender issues, as well as providing guidance on security sector and criminal justice reform. Marcena has a JD from Washington and Lee University, and a BA in Political Science from the University of Denver. She is currently based in Australia.