Silje has been employed by Oxford Research since November 2020, first as a researcher, and from February 2021 as an analyst. She holds a Master's degree in Political Science and Management, as well as a bachelor's degree in Political Science from The University of Agder Oslo. The master's thesis dealt with how social media affects agenda setting in political decision-making processes. Silje was awarded the Fritt Ord Student Scholarship based on the project idea and the theme of the master's work. She has worked as a mentor at the Department of Political Science and Management at UiA, and has also been an intern with the Business Association in the Kristiansand region.