Tammy Mariani
Principal of Cedar Hill High School

Mrs. Mariani has over three decades of academic experience ranging from her early career as a classroom teacher at various districts, to being the Lead Counselor and Assistant Principal at Cedar Hill High School. Her career thus far has afforded her a wide range of experiences in both education and business.  Her strong work ethic and desire to continue to be a life-long learner has built a strong foundation for her success as an educator.  With four years of experience working at CHHS, Mrs. Mariani feels that she has a full working knowledge of the organization and present culture of the school.  She is looking forward to the opportunity to work with staff, parents, and community to ensure the success of our students and school.

Dr. Daniel Johnson
Principal of Ninth Grade Center

Dr. Johnson is an educator with 22 years of experience in the Dallas Independent School District. He has served as a classroom teacher, assistant principal, and principal at the elementary, middle, and high school levels. Due to his track record and ability to inspire, motivate and professionally develop teachers, he has been assigned the most challenging schools as principal. In each of these assignments, he has been able to inspire the students and staff in a manner that afforded academic progress each year. Dr. Johnson looks forward to using his vast experience and working with students, staff, parents, and the community to make the Ninth Grade Center a premier school.