1. Structural Engineering Department, Building Research Institute, Ministry of Construction
2. Steel Structure Development Center, Nippon Steel Corporation, M. Eng.
3. Construction Technology Dept., Sumitomo Metal Industries LTD, M. Eng.
4. Construction Technology, Dept., Sumitomo Metal Industries LTD, M. Eng.
5. Construction Materials Business Development, Dept. Kawasaki Steel Corporation, M. Eng.
6. Structural Engineering Department, Urban Infrastructure Engineering Group, KOBE STEEL, LTD, M. Eng.