Mark has been a performer, choreographer and consultant for The Muny since 1973. Since 1984, Mark and his wife, Caren, have been the directors of Krupinski Academy of Dance. Mark is also the founder and artistic director of the American Dance Troupe. He has performed with Gene Kelly, Herschel Bernardi, and Chita Rivera, and was an original member of the American Dance Machine in New York City. Mark also served as an artist-in-residence at Webster University for more than 10 years.