Economopoulos has been a field organizer for various causes for the past 12 years. She now runs the Greenpeace online organizing program, where she develops and uses technology tools to coordinate scalable online/offline grassroots organizing and volunteer efforts, and develops outreach and advocacy strategies in online social networks. She is a founding member of Not an Alternative, a non-profit political arts organization that treats symbols, stories and events as vehicles whose meanings are available for hijacking.