In May 2014, he was elected president of the American Guild of Organists in a national election, installed in that position at the Guild's National Convention in Boston the last week of June, 2014. As president, Walker led an organization representing more than 16,000 organists. Walker received the Professional Achievement Award from Westminster Choir College in 1984. In 1999 he received a Fulbright Fellowship grant for a lecture series at a college in Taiwan to teach organ repertoire and hymn improvisation, along with giving frequent organ recitals. Shortly before he was to begin this series, the devastating 1999 Chi-Chi earthquake hit Taiwan on September 21 which measured 7.6 on the MMS scale. Walker's performances became benefit concerts, instead helping to raise money for disaster relief between October, 1999 and February, 2000. A recital by Walker, originally intended to be part of the 50th anniversary celebration of Taiwan's current government, was transformed into a memorial service for the earthquake's victims. His recital at National Concert Hall in Taipei in March, 2013 marked his 14th concert journey to Taiwan. John Walker has recorded for the Pro Organo, Gothic, and JAV labels. In addition to several choral recordings, his organ discography includes: