• Sao Paulo 2005 - Waterproofing

• Bangkok 2006 - International Symposium on Underground Excavation and Tunnelling

• Lisbon 2006 - International Seminar on Tunnels and Underground Works

• Vancouver 2006 - 19th National Conference

• Warsaw 2006 - Fire Protection and safety measures in rail, road ans metro tunnels

• London 2006 - Fire Protection Engineering for New and Existing Tunnels

• Sharm el Sheikh 2006 - International Symposium on Utilization of Underground Space in Urban Areas

• Riyadh 2006 -Workshop on safety in tunnels and underground structures