[1] Leaving his homeland of Belfast in Northern Ireland in the early 1970s, Haller spent time in Russia, Afghanistan and Japan.

Coming to California in 1974, he entered Tassajara Zen Mountain Center and was later ordained as a priest by Zentatsu Richard Baker in 1980.

He received shiho from Sojun Mel Weitsman in 1993, giving him authority to teach.

[2][3][4] Since 2000 Haller has also been the teacher of Black Mountain Zen Centre in Belfast, Northern Ireland.

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