Feature

Now Departing: Union Pacific’s 40-Year-Old Mainframe

After decades of service from a mainframe that kept on chugging, Union Pacific IT leaders knew they had to retire their workhorse. But how do you get rid of a massive, core technology system, without disrupting business operation, breaking the bank, or biting off too much change at once? Here's advice from a CIO who's in the midst of doing it right.