Meet Our Dedicated Administration
- Headmaster
- Principals
- Business Office
- Athletic Director
- Office Manager
- Registrar
- CCA Board
Jeff Guleserian, Ph.D.
Jeff received his doctorate from Southwestern Baptist Theological Seminary. He has over twenty years of teaching and educational administration experience in school environments that range from elementary to postgraduate (masters) level. "Dr. G." came to Cornerstone in the spring of 2008. As a Headmaster, he is charged with the daily operations of the school and the overseeing of all CCA programs.
Principal: Sandy Hanson, M.Ed.
Sandy served 18 years in public education prior to joining CCA as principal in 2009. Her professional background includes teaching Junior High and High School for several years. After receiving her masters degree in education, Sandy served as an administrator and provided classroom management workshops to teachers and administrators for the Region 10 Education Service Center. She has co-authored 7 publications for teachers pertaining to classroom management. Sandy has been a passionate advocate for the university model system since enrolling her own two boys as CCA in 2005.
Vice Principal: Lisa Morgan, Ed. D.
Lisa Morgan has bachelor’s degrees both in Communications and Elementary Education. Her teaching certification includes grades 1st-8th, with a specialization in Reading. Lisa also has a Master’s and Doctorate in Educational Administration. Grades taught include preK, Kindergarden, 4th grade, high school, and college. While her background is in both public and private school, she is grateful to have a permanent home at Cornerstone for both herself and her family. Lisa has been married to her husband Charlie for 15 years, and together, they have two boys, Jackie (10) and Daniel (4). Jackie is in the 4th grade at Cornerstone, while Daniel is still awaiting his turn.
Mr. Aaron Davis
Aaron Davis joined the staff of CCA in August 2011 as Business Manager. He previously worked as the Executive Director for a crisis center in Cooke County handling all the day to day operations of the agency, including the financial management. He also leads praise and worship in his church on the weekends. Mr. Davis holds a Bachelor’s Degree in Family Studies and a Master’s Degree in Education. Mr. Davis lives with his wife (Amy) and three children (Karis, Blake, and Josh) in McKinney. Karis will be attending 4th grade at CCA and Blake will be attending 1st grade at the school. Aaron is excited about the opportunity to work for CCA and cannot wait to see what God has in store for the school this year!
Sean Hanlon
Sean has a B.A. in public relations from the University of North Texas. He has a long history of high school and college sports. At present, he is serving as a Senior High Youth Director for Wylie Northeast Church, where he has been mentoring teens since 1999. He is currently working on his certification in the fundamentals of coaching and working on his accreditation as an athletic director through the National Federation of State High Schools. The NFHS is recognized by the National Council for accreditation of Coaching Education.
Dana Guleserian
Dana comes to CCA with a strong background in office management and much experience in University Model Schooling. Her love for students makes her a favorite, especially among the elementary grades. Not only does she keep the school organized and informed, but she acts as the CCA event planner as well. She has four children, all of whom are CCA students. She has been with the school for two years.
Kimberly Rippentrop
Kimberly is a native Texas who grew up in the Collin County area. She received her education from Collin College in Computer Aided Drafting and Design with a focus on Interior Design. Before becoming a mom she enjoyed a successful career as a contract Space Planner/Facilities Coordinator for companies like Nortel, Lockheed Martin and MBNA. She also spent several years as a commercial interior designer in North Texas and Oklahoma. She is proud to be a CCA mom!
Doug Hagedorn (Chairman) and his wife Dana established CCA in 2002 along with Scott and Karin Campbell. Doug earned his MBA from University of Dallas and BA from Michigan State University. He authored Ease the Squeeze, taught financial seminars and served as an adjunct professor for LeTourneau University. He is Director of Business Operations at Raytheon in McKinney, TX. Doug has also served on a number of church and non-profit ministry boards. He and his wife Dana are blessed with 3 children and reside in Fairview, Texas.
"We truly believe this is God’s school and are grateful for His favor upon it. God is good! Our heart is to see a school that has a non-compromising generational impact that glorifies Jesus Christ."
Scott Campbell is employed at Texas Instruments as a manufacturing supervisor. He has been there for nine years. The previous ten years, he was a manager for Wal - Mart. Scott earned his BA from Stephen F. Austin State University in history and political science. He and his wife Karin have 4 children, Rachel, Hannah, Abbie, Luke and reside in McKinney, Texas. The Campbell family is one of the founding families of CCA and so have been here from the beginning.
Hugh Porfirio was born in Angola, Africa, and raised in California for the majority of his life, until he, and his family were called to Dallas, Texas in 2005. He received his Bachelors of Arts Degree in Kinesiology and teaching credential from Long Beach State University. He taught middle school education for 2 years, primarily working with the “at risk students” at El Cerrito Middle School, in Corona California.
Since moving to the Dallas area, Hugh has been working in the real estate industry, working mainly in the New Home Markets. Hugh and his wife Stacy are blessed to have 4 children: Liliana, Leila, Elijah, and Elaina. They currently live in McKinney, Texas. Hugh and his family are passionate about the young generation the Lord is raising up today, and believe that God is in the process of changing the understanding and expression of Christianity in the earth in one generation.
Casey Crawford was raised in Denison, Texas. He attended The University of North Texas and obtained a B.B.A. in Strategic Management with a minor in Business Computer Information Systems. Casey is also a six sigma black belt in quality control/management and certified project management professional. He has held executive leadership positions in healthcare as well as technology industries. Casey is currently employed by Dell as the Director of Desktop Virtualization Program Management. He has also served on the Board of Directors for an upstart technology company in the healthcare industry as well as the director of youth baseball. Casey has been married for 18 years to his wife Amy and they have two children, Cooper (16) and Hannah (13) and reside in Prosper, Texas.
Paul Brewer and his wife Sharon have been married for 18 years and have 2 children, Jordan (13) and Ashleigh (5) and live in McKinney, TX. He is Director of Development at East-West Ministries in Plano, TX. Paul has over 27 years of experience in working with non-profits and ministries in development, marketing, and print media. They also serve as small group leaders in the youth department at Family Worship Center in McKinney, TX.
Jorge Diaz de Leon was born and raised in Chihuahua, Mexico. He moved to the U.S. to attend university and then married his college sweetheart, Julie, in 1991. They returned to Mexico and then Costa Rica to serve in the church ministry for several years. They moved to the U.S. in 1996. Jorge obtained his MBA in 2005. He has worked in sales & advertising for several years and is currently transitioning to the accounting field. He enjoys serving in his church and community. Jorge and Julie are blessed with two children - David and Jessica. They have been part of the CCA family since 2007 and love the extra family time provided by the university model school system. Jorge believes that parents’ most important mission in life is to educate their children in the knowledge and love of Jesus Christ our savior.
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