Mr. Thimmaraju Mohan, Advisor- Geo-technical, APESI Pvt. Ltd.,  have been practicing in the field of Geology, Hydrogeology, Groundwater and Mineral Exploration, and also in the field of Engineering Geology ,drilling in all types of formations using some advanced type of machinery made in India, since the last 3 1/2 decades and also during the period have worked in various types of Geological Scenarios. He also worked in the Republic of Botswana for a period of 5 years and also carried out field work in Tanzania on a short term assignment.