- 1992 - 1997 :Associate Professor, Community and Environmental Resource Planning, College of HumanEcology
- 1992 - 1997 :Associate Professor, Community and Environmental Resource Planning, College of HumanEcology
- 1997 - -:Deputy Director for Administration, SEAMEO Regional Center for Graduate Study and Researchin Agriculture (SEARCA)
- 1997 - -:Fellow, Forestry Development Center,College, Laguna
- 1997 - -:Deputy Director for Administration, SEAMEO Regional Center for Graduate Study and Researchin Agriculture (SEARCA)
- 1997 - -:Fellow, Forestry Development Center,College, Laguna
- 1995 - 1996 :Officer-in-Charge, Office of the Undersecretary for Regional Operations, Dep. of Science andTechnology, Philippines
- 1995 - 1996 :Officer-in-Charge, Office of the Undersecretary for Regional Operations, Dep. of Science andTechnology, Philippines
- 1993 - 1996 :Assistant Secretary, Development Policy, Planning and Resource Generation, Dep. of Science andTechnology, Philippines
- 1993 - 1996 :Assistant Secretary, Development Policy, Planning and Resource Generation, Dep. of Science andTechnology, Philippines
- 1996 - -:Consultant / Project Leader, Community-based Coastal Resources Management Project,SEAMEO Regional Center for Graduate Study and Research in Agriculture (SEARCA)
- 1996 - -:Consultant / Project Leader, Community-based Coastal Resources Management Project,SEAMEO Regional Center for Graduate Study and Research in Agriculture (SEARCA)
- 1987 - 1992 :Dean, College of Human Ecology, UPLB
- 1987 - 1992 :Affiliate Assistant Professor, Dep. of Social Forestry, College of Forestry, UPLB
- 1987 - 1992 :Affiliate Assistant Professor, Institute of Environmental Science and Management, College ofArts and Science, UPLB
- 1987 - 1992 :Assistant Professor, Community and Environmental Resource Planning, College of HumanEcology, UPLB
- 1987 - 1992 :Dean, College of Human Ecology, UPLB
- 1987 - 1992 :Affiliate Assistant Professor, Dep. of Social Forestry, College of Forestry, UPLB
- 1987 - 1992 :Affiliate Assistant Professor, Institute of Environmental Science and Management, College ofArts and Science, UPLB
- 1987 - 1992 :Assistant Professor, Community and Environmental Resource Planning, College of HumanEcology, UPLB
- 1992 - -:Professor, Graduate School, Union Colleges of Laguna Subjects: Forest Administration, Social Forestry, Environmental Management, Environmental Policies
- 1992 - -:Professor, Graduate School, Union Colleges of Laguna Subjects: Forest Administration, Social Forestry, Environmental Management, Environmental Policies
- 1989 - 1990 :Fellow, United Nations Center for Regional Development (UNCRD), Nagoya, Japan
- 1989 - 1990 :Fellow, United Nations Center for Regional Development (UNCRD), Nagoya, Japan
- 1982 - 1987 :Instructor, Resources and Technology Management, College of Human Ecology, UPLB
- 1982 - 1987 :Instructor, Resources and Technology Management, College of Human Ecology, UPLB
- 1975 - 1980 :Instructor, Silviculture and Forest Influences, College of Forestry, UPLB
- 1975 - 1980 :Instructor, Silviculture and Forest Influences, College of Forestry, UPLB
- 1975 - 1975 :Research Assistant, Central Forest Experiment Station, College of Forestry, UPLB
- 1975 - 1975 :Research Assistant, Central Forest Experiment Station, College of Forestry, UPLB
- 1972 - 1973 :Forester, Bureau of Forestry, Philippines
- 1972 - 1973 :Forester, Bureau of Forestry, Philippines
- Ritsumeikan Asia Pacific University College of Asia Pacific Studies Vice President