School Leadership

Glenn Duncan
Glenn DuncanSchool Board President
To change the world would be impossible for just one person, but to change the world one person at a time is not only a possibility, but a personal mission for Glenn T. Duncan. As the Superintendent and CEO since 2004, Mr. Duncan has led Southlands Christian Schools to become a premier private Christian school in Southern California. Over the past twelve years, Southlands has experienced dynamic growth and the changing of many lives.

In his previous occupations, Mr. Duncan pioneered marketing and brand management success for a number of companies, including a four year stint in Melbourne, Australia as the Director of Business Development for Linfox Distribution Group. After working closely with a pastor who encouraged him to learn the importance of waiting on God, a passion awakened in him to live his life to please God, which eventually led him to Southlands.It is Mr. Duncan’s mission to raise up global leaders by first bringing each student to a saving knowledge of Jesus Christ and envisioning them to fulfill their God-given destinies.  His dream is to see students graduating with integrity and being agents of change in the world.

High School

Brandon Shultz
Brandon ShultzHigh School Principal
Mr. Shultz has served as a teacher and administrator in international education for the past 15 years. After earning a BS in Biology and a MS in Educational Leadership, he worked as a missionary and educator in Taiwan for seven years. For the past eight years, he has worked at Southlands as a teacher and administrator. During that time he also had the privilege of starting three satellite programs for high school students studying in China. He currently serves as the principal of the high school and enjoys a job that combines his two greatest passions: missional Kingdom work and education.
Maria Garcia
Maria GarciaAssistant Principal of Counseling
Mrs. Garcia has her MA in Education and BA in Psychology. As a school counselor for 16 years, she worked in both private and public schools. Mrs. Garcia also was also a college counselor in La Paz, Bolivia for two years while on a missionary trip with her husband and three children. In her current role as Assistant Principal at Southlands, she oversees the counseling program, helping students achieve their academic, career, personal, and social goals. She provides individual college counseling and assistance to students in the college application process. Her passion is helping to launch students into top universities so that they can obtain successful careers as godly men and women.
Lauren Choi
Lauren ChoiAssistant Principal of Curriculum and Instruction
Mrs. Choi has a BA in Psychology and minor in Biblical Studies, an MA in Education and English, and a certificate in Spiritual Formation. She taught for 13 years, mostly in the public high school setting and felt that the best part about teaching was forming relationships with students. She loves it when former students come back to visit her and she gets to see how they have matured and grown. She is very passionate about education and empowering students and teachers to realize their full potential.
Sara Jacobsen
Sara Jacobsen
Mrs. Jacobsen, an educator for 32 years, earned her BA in Education. As Secondary Principal for Southlands for over 14 years, she trained and supervised teachers in the private school sector to further prepare students for success at both the college and professional levels. A lifetime resident of Southern California, she has observed and developed programs at Southlands to adapt to the needs of the ever-growing and changing multi-cultural communities such as Diamond Bar, Walnut and Rowland Heights.

Middle School

Rosie Pack
Rosie PackMiddle School Principal
Mrs. Pack has been a part of SCS for over 17 years. She has a BA in Psychology and a minor in Child Development and is earning an MA in Education Administration. Having taught at both the elementary and secondary levels, she enjoys the growth and development that occurs in young people. Seeing the things that God has purposed for the next generation is a privilege and a blessing. Her vision and prayer is that each student that enters Southlands leaves with an understanding of the love of Christ and His grace, as well as knowing God’s will for their life.

Elementary School

Sue Yoon
Sue YoonElementary School Principal
Mrs. Yoon earned her BA in Christian Education (emphasis in Elementary Education & Sociology) and MA in Christian Education. With a passion for teaching, she taught for 21 years before stepping into administration. Her desire in life is to save, touch, and change lives in the name of Jesus Christ through Christian education. In Luke 2:52, it says, “And Jesus grew in wisdom and stature, and in favor with God and man.” That is her daily prayer for all the students here at Southlands Christian Schools.


Koryn Parker
Koryn ParkerPreschool Director
Mrs. Parker enjoyed being an elementary teacher in both public and private schools for the past 13 years. She has an MA in Education as well as a Preschool Administrator certificate. Her passion is to educate and equip young children, parents and teachers in the education and development of the whole child- physically, socially, emotionally, cognitively and spiritually. Mrs. Parker enjoys infusing creativity, imagination and music into all aspects of her life.

International Department

Wanda Tung
Wanda TungDirector of Global Partnerships
Ms. Tung received her Masters of Social Work & Business from The University of Southern California as well as her Bachelors of Arts in Psychology & Education, from The University of California, Santa Cruz. Previously she has worked with multibillion-dollar companies that strive to provide educational resources to their surrounding communities in addition to developing educational programs that promote student engagement and leadership. She is passionate about establishing partnerships that directly impacts each student to become life changers and for them to discover their own identities rooted in Christ.
Christina Lee
Christina LeeELD Department Chair and Lead Teacher
Mrs. Lee is the ELD Department Chair and a lead teacher at Southlands Christian Schools. She received her BA in English with an emphasis in Secondary Education and MA in Teaching. She has her TESOL certificate and has taught ELD students ranging from beginning, intermediate and advanced levels. Her vision is to develop a strong system of support among teachers and students that sets all ELD students up for success in mainstream classes.
Jane Zhu
Jane ZhuDirector of Advancement
Mrs. Zhu received her BA in English and previously had been a high-level administrator at the Education Bureau of China where she worked with hundreds of students and top school leaders to develop academic and student growth programs. As an immigrant herself, she understands the academic, social, and personal needs of immigrants and international students from both the parent and student perspective. Her vision is to create a close community between students, parents, and the school, where each individual can better understand each other’s perspectives. Her desire is to be a vessel to guide parents and students through this personal and spiritual journey so they can become aware and thankful of God’s blessings.