Marcena is the Director of Extractives at the Global Initiative Against Transnational Organized Crime, which she has been with since 2013. While Marcena’s work has covered a wide scope of material and geographic spread, her current portfolio of work focuses on extractives-related crime, in particular gold-related crime, illicit financial flows and development impacts and responses to organized crime. Marcena’s past work includes analysing migration flows, access to justice, and gender issues, as well as providing guidance on security sector and criminal justice reform.