It was almost certainly BG Turnkey who Microsoft farmed out their Sandyford documentation and media manufacturing to in the early 90s. BG Turnkey were originally Irish, with their HQ next door to Apple in Hollyhill, Cork, until they themselves were taken over by an American corporate in 1995. In 2006 a large chunk of their manufacturing was moved to the Czech Republic. I guess BG were an MNC in the strict sense of the word, but their business was crumbs from the table of other MNCs and their aggressive cost controls reflected that.
A mate of mine worked on the production line for Microsoft when they manufactured their own media and docs in Sandyford. He got his foot in the door of a desk job just before BG Turnkey came in, and is still there 25 years on with mainly on-the-job experience/qualifications. I would guess he earns 80-90k which I would consider not bad.