Yes, there are modern dance companies in the heartland. And Mariel Greenlee is a notable performer of one of the Midwest's most prestigious modern troupes, Dance Kaleidoscope.
A graduate of Point Park University in Pittsburgh, Mariel Greenlee studied dance in New York with, among others, the Martha Graham Center for Dance, the Paul Taylor School and the David Parsons Workshop. And, as you already know, those are pretty important institutions, as far as namesake dance schools go.
As of this writing, Ms. Greenlee is in her ninth season with Dance Kaleidoscope.