MGM Springfield will employ 3,000 employees when the $960 million luxury resort opens later this year in downtown Springfield. This is the largest employment posting by the new resort, and one of the single largest hiring efforts in Springfield history. There are about 2,400 open positions for hire today at MGM Springfield. SPRINGFIELD - MGM Springfield announced it has added 75 new postings representing more than 1,000 jobs to the resort’s website.