- Assistant Professor, Mahidol University
- Visiting Faculty, Sasin School of Management
- Assistant Professor, Mahidol University, 1999–present
- Visiting Assistant Professor, IESE, 2014
- Teaching Assistant, INSEAD, 2007
- Visiting Lecturer, Chulalongkorn University, 2002–2005
- Policy and Plan Analyst 4, National Economic and Social Development Board (NESDB), 1999.
- Senior Technical Staff Member, AT&T Laboratories, 1998 – 1999
- Kapasuwan, S., & La-ornual, D. (2023). Air Cargo Competitiveness and Economic Performance of Asia-Pacific Countries. Journal of Business, Economics and Communications, 18, 72-91.
- Tirapat, S., & La-ornual, D. (2022). The Effect of Price and Ambiguity on Crop Insurance Purchasing Decisions of Thai Rice Farmers. Journal of Multidisciplinary in Humanities and Social Sciences, 5, 1453-1473.
- Tiengladdawong, P., & La-ornual, D. (2022). Perceived Risk and Willingness-to-Pay for Different Organic Certification Levels in Thailand. International Journal of Multidisciplinary in Management and Tourism, 6, 88-98.
- Wattanacharoensil, W., & La-ornual, D. (2019). A systematic review of cognitive biases in tourist decisions. Tourism Management, 75, 353-369.
- Namprasertkula, U., & La-ornual, D. (2016) Influence of internal versus external references on individuals’ satisfaction with academic and professional performance evaluations. Journal of Population and Social Studies, 24, 1-12.
- Apinantham, P., & La-ornual, D. (2015). Diversification behavior of individuals over potential losses under risk and ambiguity. Journal of King Mongkut’s University of Technology North Bangkok, 25, 1-10.
- Onay, S., La-ornual, D., & Öncüler, A. (2013). The effect of temporal distance on attitudes toward imprecise probabilities and imprecise outcomes. Journal of Behavioral Decision Making, 26, 362-374.
- Diecidue, E., & La-ornual, D. (2009). Reconciling support theory and the book-making principle. Journal of Risk and Uncertainty, 38, 173-190.
- Ph.D., Management (Decision Sciences), INSEAD, Fontainebleau, France.
- M.S., Engineering-Economic Systems and Operations Research, Stanford University, Stanford, California, U.S.A.
- M.S.E., Industrial and Operations Engineering, University of Michigan, Ann Arbor, Michigan, U.S.A.
- B.S.E., Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, U.S.A.