Leigh Brasington has been practicing since 1985 and is the senior American student of the late Ven. Ayya Khema, who confirmed Leigh's practice and requested that he begin teaching. Leigh began assisting Ven. Ayya Khema in 1994 and began teaching retreats on his own in 1997. He continues to teach in Europe and North America. His teaching emphasizes using concentration as a preliminary to insight practice. He lives in Alameda and works as a software engineer.