He is one of the leading researchers in understanding the impacts of microaggressions, or subtle forms of discrimination, on the mental and physical health of people of color, lesbian, gay, bisexual, and transgender (LGBT) people, and other marginalized groups. He is also the author of the books "Filipino American Psychology: A Handbook of Theory, Research, and Clinical Practice" (2011, John Wiley and Sons), "Filipino American Psychology: A Collection of Personal Narratives" (2010, Author House) and "Women and Mental Disorders" (2011, Praeger). In 2011, he received the Early Career Award for Contributions to Excellence by the AAPA and in 2012, he received the Emerging Professional Award for Research from APA's Division 45.