Our Staff

Lisa Hastings-Sheppard

Director of Programs

Lisa Hastings-Sheppard is Director of Programs at 4th-Dimension Leaders. Lisa spent 22 years at Delaware Technical Community College as an instructor, executive communications manager, assistant vice president of marketing, and senior programs director. She holds a Bachelor of Arts in English and a Master of Instruction, both from the University of Delaware. Lisa served on the Commission for Early Education and the Economy during the Markell administration and currently is a member of the Board of Directors at Wilmington Montessori School.

Jonathan (Jon) Chavez

Director of Partnerships

Jonathan (Jon) Chavez is the Director of Partnerships for 4th-Dimension Leaders. His career began in the college access and success sector, working across the landscape with non-profit and school institutions to increase equity in college success. After eight years serving students, he joins 4DL’s passion for disrupting discrepancies in opportunity and serves to grow our partnerships while also enhancing our current relationships.


Jon holds a BA in Sociology from Bard College as well as an AA in Liberal Arts from LaGuardia Community College. As a non-traditional student, his inability to access opportunities inspired his passion for equity work. Currently, he volunteers time to read applications for the Kaplan Leadership Program and supports transfer initiatives with the Honors Student Advisory Committee at LaGuardia Community College. He holds certifications in Youth Development and College Access Counseling and completed the Emerging Leaders in Nonprofit Management Program with Partnership for After School Education (PASE)/Baruch College Austin W. Marxe School of Public and International Affairs.

Dr. Cara Candal

Principal Consultant

Cara Candal is the Policy Director of Educational Opportunity for ExcelinEd focusing on private school choice.

Cara has spent the last 10 years working in education policy as a Senior Fellow with both Pioneer Institute and the Center for Education Reform. She was also a founding team member of the National Academy of Advanced Teacher Education (NAATE) and a research assistant professor at Boston University in the Department of Educational Leadership and Development. Cara has authored and/or edited more than 25 papers and three books on education policy. She earned a Bachelor of Arts in English Literature from Indiana University, a Master of Arts in Social Science from the University of Chicago and a Doctor of Education from Boston University.


Rachel Valentin


Rachel Valentin is currently the Principal & Instructional Leader of Charter School of New Castle Elementary Campus serving grades K – 4 (425+) students. Rachel has been instrumental in leading collective change and transforming the culture of the Charter School of New Castle during a difficult leadership transition in 2014-15.  During her tenure, the school experienced a major turn-around that resulted in improved student and parent experience, consistent routines & systems; positive staff culture and academic programming.  

 Rachel relocated to Delaware to participate with the Delaware Leadership Project a Principal Fellowship developed by Innovative Schools. Rachel has served as an adjunct professor with Relay Graduate School of Education Delaware and now with 4th Dimension Learning.  Prior to relocating, Rachel was a Teacher with Uncommon Schools in Brooklyn, NY. She has also served as Math Curriculum Planner and Instructional Coach.

 Rachel has earned a M.Ed. in Education from Hunter College in New York. In addition, Rachel has earned an M.A. in Political Science with a central focus on Urban Affairs/Policy & Public Administration) Brooklyn College in Brooklyn, NY. Rachel has also earned a B.A. in History with a minor in Writing from Spelman College in Atlanta, GA.

 Rachel’s professional experience began at JPMorgan Chase. While there she was responsible for the strategic development and launch of new products for high profile clients, and strategic management of traditional credit and banking products. She is a professionally trained Project Specialist, Data Specialist and Relationship Manager.

 Leader Message:  At the Charter School of New Castle, I am committed to ensuring that students receive both the academic and personal skills needed to be college and career ready. We provide teachers with consistent coaching, best practices, high leverage targeted feedback, and data analysis to improve student academic results. My vision is that all students can and will graduate from high school and college with the tools to be successful in life. It is our responsibility to set no limits to student learning because this work matters and our students matter.  All students, all students will, we will get them there! 


Dr. LaRetha Odumosu


Dr. LaRetha C.P. Odumosu, known to many of her students and colleagues as Dr. O, started her educational career as an Upward Bound tutor and then instructor while attending Rutgers University in New Brunswick, NJ as an undergraduate English literature major. Since then, Dr. O has received her MA in English Literature from Pennsylvania State University and her PhD in Urban Education from Temple University. Dr. O has taught a variety of grades throughout her career serving as a middle school English teacher, a high school English teacher, a college freshman instructor and a graduate school professor. Over the past ten years, Dr. O has served as a school leader in secondary schools. Starting her leadership career as an Assistant Principal of Instruction over grades 7-12 with Mastery Charter Schools and then as a middle school principal, Dr. O now serves as an Executive Director at the Charter School of New Castle in New Castle, Delaware. Dr. O is a believer in the importance of collaboration and making your voice heard. Most recently, she was appointed by the Secretary of Education and the Governor’s Office to the Health and Wellness Working Group for school reopening in the state of Delaware.


Krista Vandetty

Director of Development

Krista Vandetty is the Director of Development at 4th-Dimension Leaders. Krista first began with 4th-Dimension Leaders as the Manager of Operations in September 2019. In this role she helped to launch the Equity Practitioner Program, grow the Lead For Delaware program, and run the day-to-day operations. In addition, Krista taught elementary students in Madrid, Spain and has worked on community development and research in the environmental nonprofit space. Krista holds a BA in International Studies with a concentration in Sustainable Development from Susquehanna University.

Angela Perry

Executive Director

Angela Perry is the founder and executive director of 4th-Dimension Leaders, an organization dedicated to disrupting discrepancies in opportunity. 

Angela began her career in education as a middle school math teacher. After seven years in the classroom and five years serving in school- and systems-level leadership roles, she spent six years working in national education non-profits, cultivating partnerships, managing development efforts in new markets and leading program design. A proud alumna of Pahara-Aspen’s Next-Gen leadership program, Angela has more than 15 years of teaching and leadership experience, is a widely recognized adult learning facilitator, panel moderator and entrepreneurial program designer through her founding work at ENCORE Facilitation Partners.