Ex Cathay 747 checkie, CASA Delegate and ATO, one of the founding members of LOSA, current/former committee member of GAPAN, RAPAC. In addition to this, also formerly a senior executive of CASA. There is also quite a bit I have missed.
These titles and aircraft types do not necessarily command respect for the owner. That said, he is entitled to his opinion which is wide open to critical comment as seen in some of these posts.