From the blog Ten Reasons I found this:
Were the St. Louis Jesuits unavailable?
You wouldn’t think that Marty Haugen, the Protestant composer of so much of the liturgical music that’s come to symbolize "what went wrong" after the Council, would be an ideal expert for a workshop on the translation of the revised missal. [!?!] You wouldn’t, but you’d be wrong. The workshop is sponsored by the Worship office for the Archdiocese of Cincinnati, and notice of it appears in both the diocesan Clergy Communications newsletter and on Haugen’s website. And to the extent that lex orandi, lex credendi has any currency, bear in mind his main reason for not being Catholic is the Church’s failure “to commission, ordain and welcome all humans as Jesus did–male and female, married and unmarried, saints and sinners. I believe that the Church, God’s people and all of creation have suffered from this omission.”
UPDATE. Haugen’s latest passion is eco-spirituality, and he believes "the next few decades will determine whether we will pass on a planet to future generations (and indeed to all life) that is sustainable and life-giving or a planet devastated and dying. This may be the single most important issue facing us today." Accordingly, he has teamed up with a fellow musician to record "Tree of Life," a collection of "earth-honoring" songs "intended to sing with groups at worship and rallies." Personal favorite: "I Am a Child of This Planet."