Question:
Which employer did Teija Tiilikainen work for in Mar, 2006?

Context:
 Teija Tiilikainen works for European Centre of Excellence for Countering Hybrid Threats from Oct, 2019 to Dec, 2022. 
 Teija Tiilikainen works for Finnish Institute of International Affairs from Jan, 2010 to Jan, 2019. 
 Teija Tiilikainen works for University of Helsinki from Jan, 2003 to Jan, 2009.

Answer:
University of Helsinki