Atty. Erwin L. Tiamson received his Bachelor of Laws degree from San Beda College of Law and was admitted in the Philippine Bar in 1997. He obtained his Bachelor of Arts degree Major in History in the University of the Philippines - Diliman. He has acquired a well-earned recognition in the field of land administration as Bureau Director of the Land Management Bureau (LMB) and Executive Director of the Land Administration and Management Project (LAMP). After leaving the government, Atty. Tiamson joined Atty. Pulido and established the Pulido and Tiamson Law Offices. He is the partner in charge in land and natural resources practice of the Firm.Atty. Tiamson served as technical advisor and policy consultant with the Department of Environment and Natural Resources (DENR), the National Economic Development Authority (NEDA) and in various World Bank, Australian Agency for International Development, United States Agency for International Development and The Asia Foundation supported land administration and property rights projects. His works includes the crafting of the 20 year DENR Land Sector Development Framework (LSDF) and the technical study for the Residential Free Patent Bill (now R.A. No. 10023). He worked as consultant in the crafting of DENR Administrative Order (DAO) No. 2009-05 (Prescribing Guidelines for the Systematic Disposition of A & D land through Miscellaneous Sales Application under R.A. No. 730), DENR DAO 2010-19 (Revised Guidelines in the Reconciliation, Indexing and Reconstruction of Survey Records), DENR DAO No. 2010-12 (Rules and Regulations for the Issuance of free patents to Residential Lands Under Republic Act No. 10023) and DENR DAO 2011-06 (DENR-LGU Partnership on Land Titling) and recently, R.A. No.11231 and RA No. 11573. He also teaches Land Titles and Deeds and Property Laws at the Arellano University School of Law and in U.P. College of Engineering.