McCarty Holsaple McCarty, Inc. (MHM) is an architectural, interior design, and planning firm that has been designing East Tennessee landmarks since the mid-1960s. Headed by second-generation architect, Douglas McCarty, the 40+ person company is one of the largest in East Tennessee and is the winner of numerous awards and citations. Its well-known projects include the renovation of the Tennessee Theatre, the McGhee Tyson Terminal of the Knoxville Airport Authority, renovations to Neyland Stadium, the Knoxville Convention Center, Clayton Center for the Arts, the City-County Building, and UT's Howard Baker Center.