Through 46 years of photography and design in advertising, editorial, corporate, reportáge, and advocacy work with NGO’s, Bartay has developed a broad base of leading clients. A partial list of clients he has photographed and designed for, include:

IDRC (International Development Research Centre)
HKI (Helen Keller International)
ARN (Asia Research News)
Québec Science Magazine
Heifer International
The India Nutrition Initiative TATA Trust
Aquaculture, Environmental & Epidemics
Southern Monitoring Centre for Viet Nam
NIN – National Institute of Nutrition
Nutrition Impact Solutions
Wella Nutrologicals
Farm Radio International
Farm Shop
World Fisheries Trust
KARI, ILFE in Nairobi
KALRO
Universidad Nacional de Columbia
University of British Columbia
University of Nottingham
Our Strength
Capa Pictures
Safran
Federal Express
Deutsch Telekom
Girl Scouts of the U.S.A.
Discover Magazine
Sacks Fifth Avenue
Gensler & Associates
GATX Corporation
Cengage Publishing