Throughout the 1990s, Andrew and his growing community travelled from England to Holland to America, eventually settling in Marin County, California. He taught retreats in Bodhgaya, Kathmandu, Rishikesh and Bali, and toured France, Germany, Switzerland, Israel and Australia.
By the early 2000s, his organization had become international, with major centers in seven countries and a large ashram, Foxhollow, in Lenox, Massachusetts. From 1991 to 2010 Andrew served as editor-in-chief of the award-winning EnlightenNext magazine, a publication that explored profound spiritual questions with contributions from some of the world's most noted thought leaders.
His books and philosophy were widely praised by a range of high-profile academics, authors and thinkers, and his intensive retreats drew thousands of people. He forged a deep friendship with the integral philosopher Ken Wilber, and the two shared and expanded their mutual perspectives through the Guru & Pandit dialogues.
Andrew's teaching style divided opinion, attracting both adulation and intense criticism — some of it from former students. But the community continued to evolve in a high-pressure environment of intense spiritual practice and commitment.