Our People
At The Langley School, our faculty, staff, and administrators are the heart and soul of all that we do. Beautiful buildings, state-of-the-art technologies, and a robust, inquiry-based curriculum would have no impact on children without dedicated, talented personnel to shape and guide their learning.
Our team is made up of a diverse group of experts who are committed to helping young people grow academically, socially, and emotionally while nurturing and supporting every child. They come from different backgrounds and generations, and bring their own unique experiences and talents. They are lifelong learners and innovators who are motivated by a growth mindset, always looking to hone their craft. They empower students to ask questions and find solutions as they prepare them to be independent, curious learners and thinkers.
Faculty & Staff Directory
Ivan Mandic
B.S., The College of Saint Rose
Ricki Marion
B.F.A., Shenandoah University
Devon McEnroe
B.S., State University of New York, The College at Brockport
Ryan McKinney
B.S., The College of William & Mary
Elena Meschieri
B.Ed., Normal 1 Dr. Nicolas Avellaneda
M.Ed., Universidad de Leon, Spain
Meghan Meyer
M.Ed., University of Virginia
Ed.D, Fordham University
Susan Millonig
M.Ed., University of Oklahoma
Leadership Team
Every day, The Langley School’s leaders apply their passion and expertise to shaping the exceptional Langley experience for our students and families.

Michele Claeys
Michele holds an M.S. from Bank Street College of Education and a B.A. from the University of Michigan.

Nadia Boga-Sbihi
Nadia received an M.B.A. in finance from George Mason University, a B.A. in marketing from ISCAE, Casablanca, Morocco, and a certificate in human resources management from George Mason University.

Greg Bokman

Deborah Don
Debbie earned a J.D. from Boston University School of Law and a B.A. from Rutgers University, Camden College of Arts & Sciences.

Emily Dutton
Emily earned an M.A. and M.Ed. from Columbia University's Teacher's College and a B.A. from Hamilton College.

Dwayne Green

Bradley Lands

Ricki Marion
Ricki holds an M.S. and a B.F.A. from Shenandoah University and is a Certified Fund Raising Executive (CFRE).

LaToya Needham
LaToya holds a B.A. from George Mason University.

Jessica Robinson

Anna Shiroma
Anna earned an M.S. from Johns Hopkins University and a B.S. from Davidson College.

Dr. Sarah Sumwalt
Sarah holds a Ph.D. from SUNY, University at Buffalo and a B.A. from the University of Virginia.

Brittany Westbrook
Brittany holds an M.S. from Franklin University and a B.S. from Northwestern University.
Board of Trustees

I-Min Chao
She received her M.B.A. from Babcock Graduate School of Management at Wake Forest University. I-Min enjoys volunteering at Langley and served as Langley’s PALS chair during the 2017-2018 school year.

Julie DeFrain
Julie is an alumna of the University of Virginia and Northwestern University Pritzker School of Law.

Ariana DiMeo
Ariana earned her B.A. in government and religion, summa cum laude, Phi Beta Kappa, Presidential Medal, from Sweet Briar College. She earned her A.M. in political ethics and biblical law from the University of Chicago Divinity School, and her business certificates from Yale University School of Management and the London School of Economics and Political Science. Ariana earned her J.D., Order of Barristers, from Tulane University Law School, and her L.L.M. in dispute resolution from Pepperdine University Caruso School of Law.

John Gilliland
John graduated with a Bachelor of Science degree in business administration from Miami University (Oxford, OH) where he received his commission through the Naval ROTC program. He also earned a Master of Science degree with Distinction in contracting management from the Naval Postgraduate School. John sits on the board of the Miami University NROTC Alumni Organization.

David Halwig
David Halwig is a president and co-founder of IntelliVen, Inc., an executive services firm which helps leaders develop and align strategy to more fully realize enterprise value. Previously, he spent over 25 years with KPMG LLC and KPMG Consulting as a general partner and senior vice president - public sector, Latin America. David is a member of the Board of Trustees for St. Georges School in Newport, RI, where he chairs the Audit and Risk Management Committee. He is a past member of the Key Executive Board for Rensselaer Polytechnic Institute and a founding member of the Chief Risk Officer’s Council for George Mason University. He is an adjunct faculty member at George Mason, leading risk management program sessions, and is a frequent lecturer for the Archer Center for Leadership Development at Rensselaer Polytechnic Institute.
David earned a B.S. in management engineering from Rensselaer Polytechnic Institute.

Denise Haselhorst
Denise holds an M.A. in human resource management from the Kogod School of Business at American University and a B.A in psychology from the University of Michigan.

Ruchi Jalla
Ruchi holds a bachelor’s degree from the University of Western Ontario, GPHR and SHRM-SCP certifications, and previously served on the Virginia SHRM State Council and NOVA SHRM Board of Directors.

Joel Kanter
Joel Kanter (Trustee Emeritus) has served as president of Windy City, Inc., a privately held investment firm, since 1986. From 1995 to 1999, he was the chief executive officer and president of Walnut Financial Services, Inc., a publicly traded company. Joel serves on the boards of several public and privately held healthcare companies, as well as several non-educationally oriented not-for-profit organizations. He is currently chair of the board for the Black Student Fund and co-chair of the board for the John’s Hopkins Center for Gun Violence Solutions.
Joel has a B.A. in political science and a B.S. in psychology from Tulane University.

Sara Magner
Sara holds a J.D. from George Washington University School of Law and an undergraduate degree from Emory University.

Alistair Miller
Alistair studied geography at Mary Washington College.

John Mitnick
John received a J.D. from the University of Virginia School of Law and a B.A. in jurisprudence from the University of Oxford. He also holds a B.A. in history and political science (summa cum laude) from Emory University.

Nicole Morrill
Nicole holds a B.S. from the McIntire School of Commerce at the University of Virginia and an M.B.A. from the Fuqua School of Business at Duke University.

Brett Nelson
Brett holds a B.A. in mathematics and an M.E. in systems engineering from the University of Virginia, as well as an M.B.A. from The Wharton School of the University of Pennsylvania.

Lara Ramsey
Lara earned a B.A. at the University of North Carolina at Chapel Hill, a J.D. at the University of Virginia, and an M.Ed. at the George Washington University.

Dane Smith
Dane received a B.E., magna cum laude, from Vanderbilt University, with dual majors in chemical engineering and mathematics.

Miguel Toledo
Miguel holds a bachelor’s degree in civil engineering from the Universidad de los Andes in Bogota and an M.B.A. from McGill University.

Brooke Weddle
Brooke has a Ph.D. in international education policy, an M.A. in economics, and an M.A. in Spanish, all from Stanford University. She also has a B.A. in Spanish and economics, high honors, from the University of Virginia.

Andrea Weinstein
Andrea graduated from Washington University in St. Louis and received a Juris Doctorate degree from American University, Washington College of Law.

Shireen Zaman
She holds a B.A. in human development from Boston College and an M.A. from the School of International Service at American University.
Faculty/Staff Spotlight
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