Northern Arizona Healthcare is looking for a new Chief Operating Officer. Hospital officials announced in an email Friday that Josh Tinkle was no longer with the company. New CEO Dave Cheney said he is looking forward to conducting an extensive search to find a new COO, who is the right fit for the position. The COO oversees operations throughout the regional medical system. Tinkle was placed on administrative leave back on June 5th. NAH told KAFF News then that the reason the move was made was due to “a personal investigation.”