Initially led by Roger Mahr as CEO, the OHC was based first in Kansas then was headquartered for three years (2011-2013) at Iowa State University until Mahr’s retirement in 2013.
Awalnya dipimpin oleh Roger Mahr sebagai CEO, OHC pertama berbasis di Kansas kemudian bermarkas selama tiga tahun (2011-2013) di Iowa State University hingga pensiunnya Mahr pada 2013.