Clark Mummau of Mount Joy is serving as the president of the Grove City College Circle (chapter) of Omicron Delta Kappa (ODK), the National Leadership Honor Society. Mummau is a student at Grove City College.

Members of ODK must be sophomores, juniors, seniors, or graduate/professional students in the top 35% of their class and embrace the society's ideals. They also must demonstrate leadership experience in at least one of the five pillars of campus life celebrated by ODK: academics and research, athletics, service to campus and community, communications, and creative and performing arts.