Jonathan is a Research Associate Professor at the Institute for Applied Research in Youth Development within the Eliot-Pearson Department of Child Study and Human Development at Tufts University. He actively engages in researcher-practitioner partnerships with both local and international organizations, aiming to promote positive youth development, character and leadership development, and overall thriving across various contexts. His ongoing research initiatives encompass partnerships in Rwanda, Uganda, South Africa, El Salvador, and the United States.

Furthermore, Jonathan has provided advisory expertise to prominent organizations such as UNICEF and USAID. Currently, he holds the position of co-editor for the Journal of Character Education and serves as the Associate Editor for character development within Applied Developmental Science.