Kathryn R. Macapagal, Ph.D., (she/her) is a research assistant professor in the Departments of Medical Social Sciences and Psychiatry and Behavioral Sciences. She directs the Social Media Working Group at ISGMH, an interdisciplinary group of researchers who examine the role social media plays in sexual and gender minorities’ lives, health, and well-being. She is a licensed clinical psychologist and directed the LGBTQ Health track of the clinical psychology predoctoral internship at Northwestern University’s McGaw Medical Center from 2015-2017. She earned a PhD in clinical psychology from Indiana University, where she trained at the Kinsey Institute for Research in Sex, Gender, and Reproduction. She completed a clinical internship in medical psychology and HIV/AIDS at the Medical College of Georgia-Charlie Norwood VA Medical Center, and postdoctoral training in health services and outcomes research at Northwestern University’s Center for Healthcare Studies. Her work spans the translational research spectrum and has recently focused on three main areas: 1) understanding ethical issues in sexual health and HIV prevention research and healthcare with sexual and gender minority adolescents; 2) developing in-person and eHealth/mHealth approaches to sex education and HIV prevention among adolescent and young adult men who have sex with men; and 3) examining the role of new media and technology (e.g., geosocial networking applications) in sexual and gender minorities’ sexual health, romantic relationships, identity development, and well-being. She is PI of a Sexualities Project at Northwestern (SPAN) grant examining SGM adolescents’ use of smartphone dating apps for sex and relationships and a Third Coast Center for AIDS Research (CFAR) supplement from NIMH examining sexual minority adolescent males’ perspectives on novel biomedical HIV prevention approaches. She is also co-investigator on several NIH grants at ISGMH focused on sexual health, romantic relationships, and HIV prevention in SGM adolescents and young adults (ASAP, SMART, 2GETHER projects).