Marcena is a Senior Analyst at the Global Initiative Against Transnational Organized Crime, which she has been with since 2012. Marcena provides research for a number of Global Initiatives projects, analysing a diverse range of organized crime flows, including illicit financial flows, and developing responses. While her work covers a wide scope of material and geographic spread, her current work has focused on gold-related crime and development responses to organized crime. 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 Queensland, Australia.