The Perryman Ranch is home to the office of the National Indian Monument and Institute, Inc. (NIMI), a 501(c)(3) non-profit organization. Robert Trepp is CEO.
NIMI's mission is to honor, preserve, sustain and celebrate
American Indian culture through the arts and education.
NIMI is the parent company of the annual Greater Tulsa Indian Art Festival,
the American Indian Theatre Company of Oklahoma,
and the American Indian Arts Association.