1997-1998 Russian Academy of Science, Invited Scientist
1998-1999 The University of Electro-Communications, Assistant Professor
1999-2001 Japan Aerospace Exploration Agency, Invited Scientist
2001-2003 Laboratory of Physics and Chemistry of Terrestrial and Space Environments, Associate Researcher
2003-2005 Royal Swedish Institution of Space Physics, Associate Researcher
2005-2008 The University of Sheffield, Research Associate
2008-2009 Tsuyama National College of Technology, Associate Professor
2009- The University of Electro-Communications, Professor
Current Affiliation:
- Professor, Graduate School of Informatics and Engineering, School of Informatics and Engineering, "Department of Computer and Network Engineering, Cluster II (Emerging Multi-interdisciplinary Engineering)", The University of Electro-Communications | 電気通信大学, 大学院情報理工学研究科、情報理工学域情報・ネットワーク工学専攻、Ⅱ類(融合系), 教授