Tamara Brennan, Ph.D., Executive Director

tamara@sextosol.org (English y español)

Please write to Dr.Tamara Brennan concerning:

  • Volunteering and internships
  • Research questions
  • Foundations interested in our programs
  • Comments about this website
  • Availability of coffee or other products
  • Questions about our newsletter


Francisco Barrios, Program Coordinator

francisco@sextosol.org (español)


Luis Manriquez, Treasurer


Financial information available upon request


Field Office in Mexico

Apartado Postal 64
Motozintla, Chiapas
CP 30900
Cell: 52.1.962.109.4824

In the United States

The Sexto Sol Center
3514 E. Contessa, Mesa, AZ,
85213-7036 U.S.A.
(480) 854-7583