Flight deck switch positions and Boeing SOP
Just a comment, if procedures taught by Boeing flight training are used, then the switch positions on the overhead are set/verified by the first officer, during the pre taxi check the pressurisation panel items are challenge/responded by the first officer whilst being monitored by the captain.
This procedure is based on areas or responsibility, at no point does the land. Asked engineer have any responsibility to position/verify/challenge/respond to the the status of the switches on the pressurisation panel, or indeed any other panel on the flight deck.
The incident was not the responsibility of the engineer, it was a consequence of poorly executed procedure and appalling CRM by the flight crew. Sadly, with regard to one of the crew members, this was, a known fact. Tragically when it was discovered no one had the b***s to bring the situation to a close.