Welcome to the Costello College of Business Faculty Directory.
Click on a faculty member's name to view their full profile which includes contact information, office location, and office hours. You can search our faculty based on academic area, or find a full, alphabetical listing, on this page.
All Faculty - Alphabetical by Last Name
Associate Professor, Marketing
Betsy M. Tretola is an associate professor within the Marketing Area in the Costello College of Business at George Mason University.
Adjunct Faculty, Finance
Mark Troutman is an adjunct faculty member within the Finance Area in the Costello College of Business at George Mason University.
Assistant Area Chair, Accounting
Additional Roles: Instructor, AccountingPeggy Tsirigotis is a supporting faculty member within the Accounting Area in the Costello College of Business at George Mason University.
Arison Chair in Values Leadership/Associate Professor, School of Integrative Studies
Dr. Gregory C. Unruh is the Arison Professor of Values Leadership at George Mason University and an expert on sustainable business strategy.
Adjunct Faculty, Real Estate Development
Malcolm Van de Riet II is an adjunct faculty member within the Masters in Real Estate Development program in the Costello College of Business at George Mason University.
Dean, George Mason University Costello College of Business
Additional Roles: Professor, Information Systems and Operations ManagementDonald G. Costello College of Business Dean Ajay Vinzé is a Fulbright Senior Specialist and global citizen, having lived, worked or traveled through more than 70 countries over the past three decades. He is fast positioning the Costello College of Business among leading business schools regionally, nationally, and globally. The Costello College of Business and Dr. Vinzé are recognized for impactful research and credited with a number of forward-thinking innovations in business education, including Modular Education through micro-credentialing and stackable certificates, Inclusive Entrepreneurship, and the development of a proactive global presence.
Associate Professor, Accounting
Gnanakumar Visvanathan is an associate professor within the Accounting Area in the Costello College of Business at George Mason University.
Assistant Professor, Marketing
Additional Roles: Associate Director, Center for Retail TransformationMariniki (Niki) Vlastara is an assistant professor within the Marketing Area in the Costello College of Business at George Mason University.
Associate Professor, Management
Additional Roles: PhD in Business Program DirectorHeather Vough is an associate professor within the Management Area in the Costello College of Business at George Mason University.
Adjunct Faculty, Business Foundations
Jim Waldron is an adjunct faculty member within the Business Foundations Area in the Costello College of Business at George Mason University.