The ACA Team
When clients choose ACA, they work with knowledgeable, senior professionals that understand both current industry conditions and their historical context. This ensures that clients receive specialized insights that will help them solve today's problems as well as preparing effectively for the future.

Click on the names below to learn more about each ACA team member's exceptional talents and experience.
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Aaron J. Gellman, Ph.D.
Dr. Gellman has over 40 years experience in the aviation and transportation fields, as both a consultant and in senior executive positions. He has extensive knowledge of transportation economics, as well as an excellent understanding of technology and its application to transportation. In addition to his business experience, he also has significant research and teaching qualifications.

He is the former Director of the Transportation Center, Northwestern University, a position he held from January 1992 through August 2000. He is currently Professor of Management and Strategy at the Kellogg School of Management, and Professor of Industrial Engineering at the Robert R. McCormick School of Engineering and Applied Science, both at Northwestern University.

Dr. Gellman is the founder and former President of Gellman Research Associates, Inc. (GRA), with over twenty years experience in consulting. A noted transportation economist he has published many articles on transportation economics and policy, research and development, the regulation of transportation, and the management and utilization of research and technology. He served for twenty-four years as an Adjunct Professor at the University of Pennsylvania, offering graduate courses in transportation and in the management and utilization of technology.

Research projects in which Dr. Gellman has recently been engaged include an analysis of the prospects of the Airbus A380, the economic evaluation of an innovative method of handling intermodal freight traffic, the identification and evaluation of the catalysts and barriers to innovation in transportation enterprises, the differences in the approach to intermodal freight service in Europe and North America and the development of tracking methodologies for managing research, development and market deployment of innovative industrial technology. He is also studying means by which new air traffic management technology and techniques can be brought into widespread use quickly and efficiently.

Before founding GRA, Dr. Gellman was a Vice President of the Budd Company, Philadelphia, where he was responsible for Budd's planning and diversification activities. Prior to joining Budd, he was the Vice President for Planning at North American Car Corporation, Chicago.

Dr. Gellman is a member of the Federal Aviation Administration's Research, Engineering and Development (R,E&D) Subcommittee on Safety and Air Traffic Services, the American Economic Association, the Transportation Research Forum, the Transportation Research Board and the American Railway Engineering Association. Since 2003, Dr. Gellman has served on the Advisory Board of the Panama Canal Authority.

Dr. Gellman received the 1995 Salzberg Honorary Medallion for Outstanding Achievement in the Field of Transportation. He was President of the Transportation Research Forum 1998-99.

Dr. Gellman received a B.A. in Economics from the University of Virginia, an MBA in Transportation from the University of Chicago and a Ph.D. in Economics from the Massachusetts Institute of Technology.