Nació en Calcuta, India en 1965. Inició la práctica de Yoga a los 4 años de edad. Fue 5 veces ganadora de la India Yoga Championship de 1979 a 1983. Obtuvo la certificación en Hata Yoga terapia para enferemadades y desordenes crónicos, en Mahila Yoga Byam Kendra, Gosh's College of Physical Edication and Yoga Training Institude.

Rajashree se ha enfocado especialmente en el lado amocional del Yoga y cómo el Yoga balancea la energía del cuepo humano y genera conecciones entre cuerpo/mente/alma mejorando la salud.

Coloboró con su esposo en la creación del exitoso Teacher Training Program, después de una trayectoria de 10 años de enseñar Yoga en los Estados Unidos.
Conduce diferentes seminarios de Yoga y desarrollo personal en diferentes partes del mundo, y enseña el aclamado Pregnacy Yoga Class.

Practices and teaches Bikram Yoga and is dedicated to being a contribution to the world as a member of the Institute of Ancient Mysteries (IAM). Esak travels widely demonstrating the art of yoga, promoting yoga asana championships, and as a member of the IAM class of 2009.Of mixed background, his mother is Jewish and father Mexican, Esak was born and raised in Boulder, Colorado. He has also lived in New Haven, Conecticut, in São José Dos Campos and Salvador, Brazil, in California's Bay area, and as a small child, in Acapulco, Mexico.

Esak graduated valedictorian from Boulder High School, then studied Political Science and philosophy at Yale University. He studied the Afro-Brazilian martial art of Capoeira for over 10 years and has continuously priaciced Bikram yoga since 1994. He graduated from Bikram's Yoga College of India in 2001.

Esak became interested in Bikram yoga as a high school athlete, at the age of 17. He used yoga to condition himself to play baseball and American football. 11 years later, in February 2005, Esak won the groundbreaking International Yoga Asana Championship, The Bishnu Charan Ghosh Cup. Since then, Esak has led yoga demonstrations and discussions world-wide. He has been invited as a guest teacher and demonstrator to various cities in India, South Korea, Thailand, Australia, China, Argentina, Chile, Brazil, Mexico, United States and Canada.
Recently Esak has begun to help other yogis who are interested in the Ghosh Cup Competition by leading coaching clinics. These clinics are held three times a year, and always fill to capacity. He is also one of the very few teachers who is authorized to lead official Bikram yoga seminars and posture clinics.
Esak is maried to Chau Kei Ngai, who was the 5th place International Ghosh Cup Champion in 2008 and 2nd place Champion in 2010. They live in Boulder, Colorado with their son Osiris and Esak's younger brother Julian.