старший механик(In marine transportation, the chief engineer is a licensed mariner in charge of the engineering department on a merchant vessel. "Chief engineer" is the official title of someone qualified to oversee the entire engine department; the qualification is colloquially called a "chief's ticket". wiki Alexander Demidov)
главный звукорёжиссёр(напр.: The painstaking work by Paul along with the project’s chief engineer Steve Orchard has enhanced the sound to make it more open, dynamic and expansive.)
