AJ is the Chief Scientific Officer at Jana Care. Jana Care focuses on biomarker assisted chronic disease management. He was a Peace Corps volunteer and a Post-Doc in the Whitesides group at Harvard where he invented a point of care test for sickle disease and worked on low-cost diagnostics. He earned his BS in Physics from Stanford and his PhD in Applied Physics from Harvard.
In this Harvard Horizons talk from 2014 when he was a grad-student, AJ talks about the development of a low-cost test for sickle cell disease. I recommend watching this video before the interview below.
In this Scientist Spotlight interview from October 2017 Dr. Kumar talks about his career pathway (which includes physics, engineering) and how low cost technologies can influence medical care.