My research focuses on the ecology and conservation of endangered colobine monkeys of Vietnam. Since 2004 I have been involved in the Khau Ca Forest Tonkin snub-nosed monkey conservation project in Ha Giang Province. Survey, census and behavioral data reveal that the population at Khau Ca is presently stable and increasing in size. Initial ecological data including information on feeding, habitat preference, social organization, and ranging behavior have been collected and are being used to help plan a forest expansion and rehabilitation program. These activities have provided the impetus for the Vietnam government to support the establishment of a species/habitat conservation area at Khau Ca in 2009. Since 2008 I have been working with colleagues from the Southern Institute of Ecology (SIE) of Ho Chi Minh City on a range of projects related to primate conservation. At Ta Kou Nature Reserve in Binh Thuan Province we have worked on the ecology of sympatric populations of Annamese silvered langurs and black-shanked doucs to better understand relationships between morphology, behavior, adaptation, and evolution. SIE and I are also partnering on a project focusing on conservation and ecology of Germain’s in the Kien Luong Karst area of Kien Giang Province. We have also provided training for protected area staff on gibbon conservation. During the past four years I have worked with Vietnamese scientists, government officials, protected area staff, international NGOs, and other stakeholders to establish a national level conservation action plan for primates.