Mrs. Denise Marks began as principal of Conshohocken Elementary School in the 2008-2009 school year. She had served seven years as assistant principal at Colonial Elementary School. Prior to joining the Colonial School District in 2001, Mrs. Marks served as a K-5 supervisor of instruction specializing in reading and language arts in the Radnor School District, where she also taught elementary and middle school classes. Mrs. Marks began her educational career as an elementary and middle school teacher in the Unionville-Chadds Ford School District.

Mrs. Marks received a B.S. and  elementary certification from Penn State University. She earned a M.Ed. in curriculum and instruction and supervisory certification from Widener University. Mrs. Marks holds a K-8 administrative certification from Arcadia University.