John is CEO and co-founder (with Dr. Tim Ball) of Principia Scientific International (PSI).
John is a seasoned science writer and legal analyst who assisted Dr. Ball in defeating world leading climate expert, Michael ‘hockey stick’ Mann in the
‘science trial of the century‘.
O’Sullivan is credited as the visionary who formed the original ‘Slayers’ group of scientists in 2010 who then collaborated in creating the world’s first full-volume debunk of the greenhouse gas theory plus their new follow-up book.