JJ Sheffer is President of New Muse Entertainment, a company that produces special events. New Muse runs Kable House Presents, a concert series hosted in York's historic Central Market; York: Crafted, a series of events featuring brief lectures on what it means to be a craftsman in York, PA; York Story Slam, an open mic storytelling series; and the I Love York City campaign. Sheffer is also part of the teams responsible for the Human Library: York and foodstruck, a food truck block party in downtown York.
She is also a freelance writer, primarily for music-related websites and print publications, and teaches a course on special event planning at York College of Pennsylvania. She studied English/Professional Writing at Kutztown University and completed her undergraduate studies at Penn State University. She is a member of the steering committee for the Women's Giving Circle of York County Community Foundation and serves on the York County Economic Alliance's board of directors.