The lecture will reflect almost 30 years of lecturer journey in environmental and engineering geology as well as geotechnical engineering. The lecture will start with lecturer’s experiences in site investigation, instrumentation, geological mapping, ground treatment, foundation and slope stabilization. Projects undertaken from onshore to offshore, and from local to international projects. Significant case studies from local projects include light rail transit, Sungai Selangor Dam, Tanjung Bin Power Plant and Putrajaya will be shared. International projects mainly for oil and gas industry covering Southeast Asia, part of Middle East, past of Central Asia and Western Europe. The core values and concept in engineering geology including engineering geological model and total geological approach will be discussed with some applications. Some misconceptions on the practice especially on Geological Terrain Mapping is adressed. Lastly, the lecture will be concluded on way forward and suggestions to improve the environmental and engineering geological practice in Malaysia including the training and teaching of the subject.