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Executive Bios

Dave Reed
Chair, CSTA Board of Directors

David Reed is an Associate Professor and Director of Computer Science & Informatics at Creighton University in Omaha, Nebraska. He received his M.S. and Ph.D. in computer science from Duke University in 1992, and subsequently taught and conducted research at Duke University and Dickinson College before joining the faculty at Creighton in 2000. His primary interests are in programming languages and computer science education, where he has published extensively on topics such as apprentice-based learning, Web-based programming, and innovative instructional methods in introductory computer science. His recent scholarship and service has focused on bridging K-12 and college computer science education.

Mark R. Nelson, Ph.D., MBA, CAE
Executive Director, CSTA

Mark R. Nelson is the Executive Director at the Computer Science Teachers Association (CSTA). He is an accomplished scholar, teacher, and executive with a collaborative leadership style and a passion for "missions that matter." While at the National Association of College Stores, Mark and his team received three national awards for innovation, including recognition by his peers as an Innovation Star within the association community. Previously he received recognition for his contributions as an ECAR Fellow at EDUCAUSE, and as a faculty member at Rensselaer Polytechnic Institute. He earned a Ph.D. with distinction in Information Science, an MBA, and a Certified Association Executive (CAE) designation. Nelson readily admits that much of his career success was enabled by his first college degree – in Computer Science.

Lissa Clayborn
Deputy Executive Director/Chief Operations Officer, CSTA

Lissa Clayborn is the Deputy Executive Director/Chief Operations Officer at the Computer Science Teachers Association (CSTA), and has extensive experience with K-12 computer education. In her role she works with educators, volunteers, partners, and industry personnel to expand and develop programs to benefit the members and the organization, and advocating for K-12 computer science education globally.

Prior to joining CSTA, she spent 14+ years at the International Society for Technology Education. During her time as the Director of Operations, Clayborn provided business analysis, developed reporting protocols and process improvement practices, oversaw selection and installation of a new association management system, provided project management on implementation of new association management software and a new content management system, oversaw the Customer Service. Additionally while working at ISTE, Clayborn oversaw the Distribution, and Marketing departments, provided planning and logistics management for a variety of events, supervised the maintenance of files and database records for all customer records, and worked with corporate sponsors and partners on alliance projects. Clayborn, over the years, has also worked on numerous projects collaborating with computer education professionals for professional development, advocacy, and standards and curriculum development.


CSTA works at many levels to support computing education.

Elementary and Middle school
(problem solving &
computational thinking)

High school
(computing &
computer science)

(enrollment &

(engagement &