Ok, here following is the list of some best Business schools located in Pittsburgh which you are looking for

Joseph M. Katz Graduate School of Business
Roberto Clemente Dr, Pittsburgh, PA 15260,
United States

Tepper School of Business
5000 Forbes Ave, Pittsburgh, PA 15213,
United States

Bradford School
125 W Station Square Dr # 129, Pittsburgh, PA 15219,
United States

College of Business Administration
Pittsburgh, PA 15260,
United States

Duquesne University
600 Forbes Ave, Pittsburgh, PA 15282,
United States

Everest Institute Pittsburgh
100 Forbes Ave #1200, Pittsburgh, PA 15222,
United States

University of Pittsburgh Center for Executive Education
4227 Fifth Ave, Pittsburgh, PA 15260,
United States

Brightwood Career Institute in Pittsburgh
933 Penn Ave, Pittsburgh,
PA 15222, United States