Emi Kaiwa
Membership Coordinator
members [at]

Media, OTAs, Business Travel

Roi Ariel
General Manager
roi [at]

Assurance: Accreditation, Recognition

Claudia Bustinza
Assurance Manager
claudia [at]


Sustainable Tourism Course
Sustainable Hotel Course

Ayako Ezaki
Training Director
training [at]

Sustainable Business Travel Course

Jisun Kim
Training Coordinator [at]

Global Coverage


Dr. Ioannis Pappas
Program Director – Mediterranean Region



Dr. Mihee Kang
Program Director – Asia-Pacific Region

India & South Asia

CB (Ram) Ramkumar
Program Director – South Asia

Latin America

Jorge Moller
Program Director – Latin America


Kathleen Pittman
Program Director – Caribbean

North America

Tiffany Chan
Communications & Destinations Coordinator

If you are from a region that is not covered by one of the Program Directors mentioned above, please contact GSTC General Manager Roi Ariel.


GSTC is a “virtual” organization, and truly global. We do NOT have a main office. Our staff, Regional Directors, Board members, Working Group and Committee members, and volunteers work from various locations around the world.

Therefore we prefer information sent to us digitally.

If you must post/mail printed material to us, PLEASE NOTE: we use a digital service to scan materials which cannot accept magazines or other bound material; and you must provide the address precisely as indicated below:

P.O. Box 96503 #51887
Washington, DC 20090-6503 USA

To repeat, please email us if possible, and only send printed material if necessary.