Christopher Hartsfield is CS’ Programs Manager. From 2015 - 2018, Christopher led CS’ Outdoor Play programming for 7-24-year-olds, including teaching afterschool children and youth interns how to co-lead cycling adventures, fitness circuits and testing, JungleGym (CS’ obstacle race and active-living fair), and over 35 single-day play events per year. Christopher earned a B.S in Health & Physical Education from Elizabeth City State University, and has a Wilderness First Aid Certification from SOLO, a Middle Manager Certificate from the American Camp Association, and Outdoor Leadership Training from the Appalachian Mountain Club's Youth Opportunities Program. In 2019, Christopher completed the Developing Leaders Program for Nonprofit Professionals at Columbia Business School’s Executive Education program and is working towards the Family Development Credential for Leaders from the NYC Department of Youth & Community Development. Prior to joining CS, Christopher was a fitness coach and floor trainer at the YMCA Armory in Park Slope instructing 4-18-year-olds in various sports classes and the youth basketball league. He is a licensed security and fire brigade officer, and demonstrates a serious commitment to safety.

Executive Director Mac Levine, MPH, founded CS in 2008 with 16 East Harlem children, and has since grown the organization to serve over 13,000 children, youth, and families. She earned a Masters of Public Health from Columbia University’s Mailman School of Public Health in the Built Environment Track, where she won the John and Kathleen Gorman Public Health Humanitarian Award. Mac also graduated cum laude from Northeastern University with a bachelor’s degree in music industry and a minor in sociology. She is involved in the Spring 2019 Cohort of the Women’s Leadership Training sponsored by PASE, Landit, and Morgan Stanley, and took part in the Executive Leadership Series for Small Agencies in the 2016/17 Class. Mac is a Senior Fellow at the Environmental Leadership Program and a graduate of the National Outdoor Leadership School. She holds a Camp Director Certificate of Added Qualification from the American Camp Association. She was recognized in CUNY's 2017 Class of 40 Under 40: The Rising Stars in New York City Food Policy. She has guest lectured at Columbia University, New York University, Icahn School of Medicine at Mount Sinai, The New School, and Northeastern University, and presented at the Just Food Conference, and the American Community Gardening Association. She is a member of the Land & Water Conservation Fund Coalition and was a member of the now defunct No Violence Initiative of the New York County District Attorney's Office. She is a co-author of "Closing Health Disparities Through A Multi-Level Approach," published in the International Journal of Child and Human Development as well as in the book Environmental Health Disparities: Costs & Benefits of Breaking the Cycle in 2016. Mac was the first solo female to stand-up paddle (SUP) the Hudson River Water Trail without assistance from Albany to Manhattan in June 2014, and the first person to SUP all five boroughs on the NYC Water Trail in late summer of 2015.