Senior Director Ir.Tan Yean Chin presented his paper at The 15th Asian Regional Confrence on Soil Mechanics and Geotechnical Engineering.titled “Underground stations excavation of up to 45m deep for mass rapid transit in limestone formation, Malaysia” and “Performance of high capacity jack-in pile for high-rise building with preboring in weathered sedimentary rock formation” in Fukuoka , Japan 9-13 Novenber 2015.