Administration

Mrs. Stefanie Sullivan, Principal

Mrs. Sullivan has proudly served as the Principal of Mountain View High School since May  2022. She is passionate about creating a school where every student is seen, heard, valued,  and empowered to lead.

Mrs. Sullivan earned her bachelor's degree in Education, specializing in Mathematics and English, from Ohio University and her master's degree in Educational Leadership from George Mason University. She is also pursuing her Doctor of Education (Ed.D.) at the University of Virginia, where her research focuses on instructional leadership, teacher growth, and creating school cultures that promote meaningful learning for all students.

She began her career in education in 2010 as a middle school mathematics teacher at Dixon-Smith Middle School before being appointed Assistant Principal at Rodney Thompson Middle School in 2015. In 2019, she joined the Mountain View community as an Assistant Principal, where she developed strong relationships with students, families, and staff before becoming principal in 2022.

Mrs. Sullivan believes that schools are strongest when meaningful relationships, high expectations, and intentional teaching come together. She is committed to building a collaborative culture where teachers are supported in their professional growth and every student has access to engaging, rigorous learning experiences that prepare them for success beyond high school.

Outside of school, Mrs. Sullivan enjoys spending time with her husband and two daughters, reading, traveling, and finding new ways to bring creativity, innovation, and joy to the Mountain View community.

Ms. Jasmine Blackwell, Assistant Principal

Ms. Blackwell was named Assistant Principal of Mountain View High School in November of 2025. She holds a Bachelor of Arts degree in Secondary English Education from

Waynesburg University and earned both a Master of Science in Sports Management and Administration and a Master of Education in Administration and Supervision from Liberty University.

Ms. Blackwell began her teaching career in 2014 at Caroline High School. She served as an English teacher at Brooke Point High School and as the Dean of Students at both Colonial Forge High School and Mountain View High School before joining the administrative team as an Assistant Principal.

Mrs. Julie Clements, Assistant Principal

Mrs. Clements was named Assistant Principal of Mountain View High School in February 2021. She holds a Bachelor's Degree in Elementary Education and Special Education from Edinboro University of Pennsylvania and a Master’s in Educational Leadership from University of Mary Washington. 

Mrs. Clements began her career as a Special Education teacher at King George High School. She taught the next twenty five years as a Special Education and Biology teacher for Spotsylvania County Public School before coming to Stafford as an Assistant Principal. 

Mr. Chris Denno, Assistant Principal & Director of Athletics and Activities

Chris Denno serves as an Assistant Principal and the Director of Athletics and Activities at Mountain View High School, where he is committed to supporting students both in the classroom and through extracurricular opportunities. With a strong background in athletics and education, Mr. Denno works to create a school culture that values teamwork, leadership, and academic excellence.

Before joining Mountain View, he taught Health and Physical Education and served as the Driver’s Education Coordinator at Colonial Forge High School. He also held roles as an Assistant to the Athletic Director and as an assistant coach for the football and baseball teams. Mr. Denno holds a Bachelor of Science in Sports Business from West Virginia Wesleyan College, a Master of Science in Sports Management from the University of Tennessee–Knoxville, and is currently completing a Master of Education in Educational Leadership through Stafford Schools’ partnership with George Mason University. His work is grounded in a passion for student growth and a deep belief in the power of school community.

Mrs. Jessica Sigler, Assistant Principal

Mrs. Sigler was named Assistant Principal of Mountain View High School in January 2024. She holds a Bachelor’s Degree in Psychology from Virginia Commonwealth University, a Master’s in Special Education K-12 from the University of Mary Washington, and a Certificate in Educational Leadership from the College of William and Mary.

Mrs. Sigler began her career as a Special Education teacher at Gar-Field High School, where she taught for five years. She then joined Mountain View High School as a Special Education teacher and later served as the Department Chair of Student Services for 15 years before becoming Assistant Principal. Mrs. Sigler is committed to fostering an inclusive and supportive learning environment that empowers all students to reach their full potential.

Mr. Trevor Wilcox, Assistant Principal

Mr. Wilcox was named Assistant Principal of Mountain View High School in November of 2025. He holds a Bachelor of Science degree in Technology Education from the State University of New York at Oswego and a Master of Education in Educational Leadership from George Mason University.

Mr. Wilcox began his teaching career at the Arlington Career Center in Arlington, Virginia. He joined Mountain View High School in 2021 as an Engineering Teacher and served as the Jobs for Virginia Graduates Specialist before becoming an Assistant Principal.

Mrs. Stacey Tully, Dean of Students

Mrs. Tully was named the Dean of Students for Mountain View High School in July of 2026 and is thrilled to be part of the Mountain View community. She holds a Bachelor of Science in Biology and Master of Education in Secondary Curriculum and Instruction from George Mason University. She later earned a Certificate in Educational Leadership from James Madison University.

A veteran educator, Mrs. Tully began her career as a 7th grade Life Science teacher at South County Middle School in Fairfax County, where she served for 13 years. She then spent three years teaching Biology at Stafford High School before joining the Mountain View team. Throughout her teaching career, she has held numerous leadership roles to include Science Department Chair, Summer School Lead, PLC Lead and Lead Mentor. Through her participation in many committees over the years, she has actively contributed to several school-wide initiatives aimed at raising student achievement. Dedicated to building strong, trusting relationships, Mrs. Tully is passionate about fostering an inclusive, positive school culture where students and staff feel valued, supported and empowered to thrive