Roelfsema, Koos

• Construction of new road in Gambia
• Construction of a tunnel in Maastricht - the Netherlands
• Construction of Aquaduct in the Netherlands - foil construction
• Widening of the highway A15 - the Netherlands
• Dredging work Jurong&Tuas – Singapore
• Construction of  Metroline Riyadh - Saudia Arabia
• Power station Kapar - the Malaysia.