John trained individually with Marshall Rosenberg in Switzerland in the summer of 1999, and became a CNVC Certified Trainer in 2000. He has facilitated trainings in a number of settings, most notably the Waldorf School movement.

John taught a 3-day home school program for 10 and 11 year-olds in Nevada City, California, where he integrated the awareness cultivated through Nonviolent Communication with a Waldorf informed curriculum and pedagogy. John passed away in 2020 and you can read an article celebrating his life.