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Bullis SchoolK-12 Private Co-Ed College Preparatory Day School

Senior Leadership Team

Bullis School Senior Leadership Team (SLT) provides ongoing evaluations of the school’s educational programs and their impact on student experience and achievement. Together with the Head of School, the team makes collaborative decisions that positively impact the entire school community.

Christian Sullivan

Head of School

Christian Sullivan began his tenure as head of Bullis School on July 1, 2020. A native of England, Mr. Sullivan holds a bachelor’s degree in education from the University of Durham, a master’s degree in educational management from the University of Bath, and a master’s degree in independent school leadership from Columbia University.

During his career, Mr. Sullivan has served as an administrator and teacher at independent schools in England, Kenya, Virginia, Connecticut, and Washington State. Bullis is his third headship, following ten years as head of Annie Wright Schools in Tacoma, WA. An active community leader, Mr. Sullivan has served on the boards of the Northwest Association of Independent Schools, the Washington Federation of Independent Schools, St. Paul’s School, WA, and Tacoma’s Museum of Glass. → Learn more about Mr. Sullivan

Jenna Borrelli

Director of Wellness

Jenna Borrelli has been at Bullis since 2021. Prior to Bullis, she was the Director of Counseling and Wellness Department Head at Castilleja School. She is a Licensed Clinical Social Worker, and before working in schools, Jenna worked as a therapist at Children's Health Council, where she helped launch the Teen Mental Health Initiative. Jenna has also worked in the foster care system as a Youth Development Clinician, Clinical Supervisor, and Director of LGBTQ services at the non-profit Side by Side. She holds degrees in Social Work from Central Michigan University and San Jose State University. Jenna is a parent to three young boys and likes being outdoors in her free time.

Genta Branstetter

Head of Lower School

Genta Branstetter joined Bullis in 2022 from The Hong Kong International School where she was an Associate Principal. She has served as a mathematics instructional coach at the Washington International School and was an elementary school classroom teacher for 18 years at schools in China, New Zealand, India, Tunisia, and Yemen. Genta earned her BS and MA in Elementary Education from Northern Arizona University and received her second MA in Educational Leadership from Michigan State University and is a National Board Certified Teacher. Beyond her work as an educator, she enjoys outdoor endeavors that include swimming, running, and finding a long hiking trail with her husband.

Faith Darling

Dean of Faculty, K-12, Math Teacher - Upper School

Faith Darling joined the Bullis faculty in 2006 as an Upper School math teacher. During her time at Bullis, she has served as Chair of the Math Department and helped to launch the STEM Signature Program in 2013 in the role of STEM Director. In 2019, Faith moved to her current position as Dean of Faculty, which supports the growth and development of her outstanding Bullis colleagues, and she continues to find joy in the math classroom. Faith earned her BA in Mathematics and Economics from Kenyon College and an MEd. in Independent School Leadership from Vanderbilt University. She is a proud wife and mother to three daughters and is a Bullis parent. She and her family enjoy camping, being outdoors, or embarking on new crafting and home projects.

Jamie Dickie

Executive Director of Technology, Teacher - Upper School

Jamie Dickie joined the Bullis faculty in 1998 teaching math in Upper and Middle School. He currently serves as the Director of Technology, overseeing the integration of educational technology into the curriculum as well as the technology infrastructure of the school. During his tenure, Jamie has served as Upper School Mathematics department chair, Technology and Engineering department chair, Co-Chair for the Bullis Accreditation Steering committee, and is a member of various AIMS accreditation visiting teams. He has been a speaker at the Future for Educational Technology Conference and the iNACOL online and blended learning conference. Jamie earned a Bachelor of Arts in History and a Master of Science in Mathematics from Michigan State University.

Sharon Kessler

Director of Advancement

Sharon Kessler has been in the office of Advancement at Bullis School since 2017. She has been a Fundraiser for over 18 years, beginning her career in NYC as the Chief Development Officer at Big Brothers Big Sisters of NYC. Ten years ago, Sharon and her husband and two daughters moved to the Maryland/DC area where she served as a fundraising consultant for Children’s National Health Systems. Sharon earned her B.A. in Sociology from The University of Massachusetts. She has been a speaker at Fundraising Day in New York City and at the Bridge Conference for the Association for Not for Profit Professionals. Sharon is also married to a Bullis Alum, Leigh Kessler ’93, and a Bullis parent.

Justin Leith

Director of Athletics, Girls Varsity Basketball Head Coach

Justin Leith joins Bullis from Stuart Country Day School in Princeton, NJ where he has been Director of Athletics and chair of the Physical Education & Health department since 2014. He has worked with girls and boys at all levels, from student athletes striving to make the team, to high school All-Americans preparing for Division I, II and III athletics. Justin began his career as a basketball player and played professionally in Europe, Asia, and Central and South America from 2008-2011. In 2009, he was invited to summer workouts with the NBA’s New Jersey Nets. Justin is a proud father of two daughters (ages 18 and 6) and a young son (age 3) and enjoys fitness, travel, and exploring new delicacies.

Marilyn Moreno Ph.D.

Head of Middle School

Dr. Marilyn Moreno has been a member of the Bullis faculty since 2012. Having worked as an executive leader in education for many years, she brings a wealth of experience, knowledge, and expertise to her position as Head of Middle School. She earned her undergraduate degree from Ohio University, a Master's in Curriculum and Instruction from Cleveland State University, and a Doctorate in Education Administration from Ohio University. Former leadership roles include serving as a principal, curriculum supervisor, regional director, and assistant superintendent.

Marilyn has served as an adjunct professor for Bowie State University and a traveling professor in Athens, Greece. Committed to mentoring and developing teachers as instructional leaders, she currently works as a college supervisor for interns seeking Master's degrees in Educational Administration from McDaniel College. She is certified by the National Institute of School Leadership and by the Framework for Teaching organization.

Dedicated to providing a rigorous student-centered instructional program to the Middle School division, she enjoys reading, spending time with family, and traveling. One of her daughters, Ariana, is a proud Bullis Alumni (Class of 2015) and an Admissions Associate for the school.

Robert "Bobby" Pollicino

Head of Upper School

Bobby Pollicino has been a member of the Bullis faculty since 2003. He currently serves as the Head of Upper School and is a Bullis parent. He earned his Master of Education from William & Mary and a Bachelor of Science in Biology from Washington College. Bobby is a speaker and presenter for the Association of Independent Maryland & DC Schools (AIMS), International Society for Technology in Education (ISTE), and Building Learning Communities (BLC) and is a contributor to National Association for Independent Schools (NAIS) Publications. He also enjoys reading, writing, and Brazilian Jiu-Jitsu.

Tanya Salewski Ed.D.

Associate Head of School for Teaching and Learning
Tanya Salewski joins Bullis most recently from a Head of School role at St. Luke’s School in McLean. Dr. Salewski has taught or had responsibility for students throughout the kindergarten through 12th grade range adding to most recent K-8 experience having served as Middle School Head at The Philadelphia School and teaching in both middle and upper school. Tanya holds degrees from George Mason, the University of Virginia, and Marymount. While Dr. Salewski holds deep curricula expertise and is student-centered, she understands the importance of supporting teachers too. Her recent Ph.D. thesis–A qualitative phenomenological exploration of impacts of COVID-19 on face-to-face teachers. Beyond the pandemic, how are the teachers?–is a testament to this. Dr. Salewski describes this new position as her “dream job.”

Tim Simpson

Associate Head of School

Tim Simpson has been a member of the Bullis faculty since 1997 and is currently the Associate Head of School. He has also served as Middle School and Upper School Science teacher, Admission Associate, 9th/10th grade Principal, Upper School Assistant Principal, Director of Admission and Financial Aid, Assistant Head of School, Varsity Hockey and Lacrosse Coach, and Advisor. Tim has a bachelor's degree from Tufts University and a master's degree from Johns Hopkins University. His three children Meghan '21, Will '24, and Tommy '29 are all proud Bullis students. His wife, Laura, is a former Bullis teacher and coach and is involved with the Parents Association.

Cheryl Terwilliger

Director of Arts

Cheryl Terwilliger has been a member of the Bullis faculty since 1998 and is currently the Director of Arts. She has performed many roles during her tenure, most notably as an instrumental music teacher in all three divisions, Upper School Visual and Performing Arts Chair, and Director of the Visual & Performing Arts Signature Program. Cheryl has a B.A. in Music from Princeton University and an M.M. in Music Education from the Eastman School of Music (University of Rochester), with a focus on trumpet performance and jazz studies. Her students have appeared in local, state, national, and international competitions and venues, including shows at Blues Alley, Disney World, the Smithsonian Big Band Jam, and tours of Cuba and China. Cheryl has been a presenter at Maryland Music Educators Association state conferences and the National Association for Music Education All-Eastern Conference.

A freelance trumpeter outside of school, she can be heard performing on various stages around town, most often with Chopteeth Afrofunk Big Band. In addition to her musical pursuits, Cheryl is a former college athlete, coach, and sports enthusiast who enjoys running, hiking, biking, and following women's soccer. Her daughter Rosie is a member of the Bullis Class of 2025.

Matt Trammell Ed.D.

Director of Admission, Co-Director of Financial Aid

Dr. Matt Trammell has been a member of the Bullis faculty since 2014. He currently serves as Director of Admission, having previously served a Middle School teacher and Assistant Head of Middle School. He earned degrees in communications, education, and educational leadership, including his Doctorate of Educational Leadership from Carson-Newman University. Matt is the co-author of the book School Culture Fit: How to Align Students, Parents, and Faculty Under One Common Purpose and co-hosts the Elevate School Leadership Podcast. He is also an avid reader and an aspiring foodie. Most of all, he enjoys finding new weekend adventures with his family. 

Rachel Venezian

Director of Finance and Operations, Co-Director of Financial Aid

Rachel Venezian has enjoyed working in educational nonprofits for over twenty years. Prior to arriving at Bullis in 2020, Rachel worked for 11 years as the Director of Finance for the College of Professional Studies and the Virginia Science and Technology Campus at George Washington University (GW) and three years as a Senior Budget Analyst in GW’s University Budget Office. She also served as Director of Budgeting and Auxiliary Services at the Corcoran Gallery of Art where she oversaw the museum cafe and admissions desk in addition to being responsible for budget preparation and forecasting. 

Rachel is a former Peace Corps Volunteer, having served as a math and science teacher in a public high school in Tougan, Burkina Faso. During her Peace Corps service, she participated in the WHO campaign to eradicate polio from Burkina Faso.

Meredith Wade

Director of Administration

Meredith Wade joined the Bullis community in 2021. Before Bullis, she was a consultant with the Hope For Henry Foundation, a non-profit focused on improving the hospital experience for seriously ill children and their families. Formerly, she was an adjunct professor at George Washington University and an attorney in private practice. Meredith has degrees from Colgate University and Harvard Law School. In her role at Bullis, Meredith leads various special projects, provides operational support, and works closely with the Board and Head of School.

Kenneth Waters Ed.D.

Director of Diversity, Equity, and Inclusion

Dr. Kenneth Waters joined Bullis in 2022. Kenneth's professional and leadership career extends throughout K-12 (urban, charter, private), non-profit, and postsecondary professions. He joins us most recently from St. Andrew's Episcopal School where he served as Director of Diverse Recruiting and Retention. He earned his Bachelor's in Mass Communications from Temple University, and at Neumann University, he earned his Master's in Organizational Leadership and Doctorate in Educational Leadership and Policy. His research and expertise revolves around cultural diversity; family, school, and community engagement; restorative practices; workforce development and training; education in the 21st century; education law; systems thinking; and organizational leadership. 

Kenneth has been featured as an expert consultant for NBC News and has presented and published internationally, nationally, and regionally on topics related to implicit bias, social justice advocacy, culturally relevant instruction, diversity, equity, and inclusion in academic environments and the workforce, educating students from marginalized backgrounds, and creating safe learning and working communities where all feel a sense a belonging. 

Kenneth is an advocate for implementing equitable policies, curricula, and programming to meet the diverse needs of professionals and students. He believes the true essence of a diverse, equitable, and inclusive environment is a place where each person, despite his or her background or status, has the same access as his or her peers.

Hobbies: Cycling, traveling internationally to learn about different cultures, reading, cooking, golfing, and spending time with my teenage son.