Josselyn currently works as a Research Coordinator at NYU Langone Health-Bellevue Hospital Emergency Department in various clinical investigations on substance use disorders. A graduate of CUNY’s Lehman College, Josselyn is currently pursuing a Master’s of Public Health at SUNY Downstate Medical Center with a concentration in epidemiology. During her undergraduate career, she performed research in the development and synthesis of "smart" persistently luminescent particles. She has served in mentor and volunteer roles through the Medicine Emergency Medicine Clinical Exposure Program, the Patient Advocacy Volunteer Program at NYU/Bellevue Hospital Emergency Department, and the Summer Undergraduate Mentorship Program at Albert Einstein College of Medicine.