Richard Plepler, a quarter-century veteran of the network, talks to Bloomberg Businessweek Editor Megan Murphy about what’s next.

We recently sat down with Ginni Rometty, IBM CEO, Chairman and President, at the Cornell Tech campus on New York's Roosevelt Island as part of Bloomberg's Sooner than You Think conference. Since she took the helm of IBM in 2012, the company has undergone another wholesale reinvention, and faced a...