Brian began researching the public health impact of child sex trafficking in 1990 at the same time he joined the Centers for Disease Control and Prevention (CDC), where he worked on HIV laws and policies, tuberculosis, and immunizations. In 2002, he co-authored the first study to estimate the global public health impact of sex trafficking of children. In 2003, he left the CDC in order to focus all his time on the maternal and child health impact of sex trafficking and sex work. Between 2006 and 2007, Brian researched the public health impact of sex trafficking in South Asia under a grant from the U.S. Department of State. Seeing a lack of attention to the maternal and child health needs of mothers who are trafficked or in sex work and their children, in 2007 he founded Global Health Promise [GHP].Brian has published studies on the maternal and child health of female sex workers and their children in Bangladesh and the U.S. and was a contributor to the 2009 IOM manual on the care of victims of human trafficking. In 2013 Brian received a Fulbright Scholarship to research the maternal health of female sex workers (FSW) in Cambodia. Based on this study, in 2016 he and two colleagues published the first ever study to document maternal deaths among FSW. In 2014, Brian was among the first ten recipients of the C10 Award, presented in Stockholm. During 2015 and 2016, he met with mothers who have been trafficked or in sex work in ten countries. Comments from the mothers were shared in an article published by The Lancet Global Health and presented at the Women Deliver Conference in Copenhagen. He and Dr. Heather Thompson, the Maternal Health Advisor for GHP, advocated for FSW at the 2019 Women Deliver Conference in Vancouver, Canada. During 2019, Brian conducted research on the maternal health of FSW and the health of their children in eight countries. Results of this study are being prepared for publication. In addition to his research, Brian has operated a small program, called “Our Mother’s House,” for mothers who are trafficked or in sex work in Portland, Oregon. Brian is the lead on all research conducted by GHP, as well as publications and partnership building.