Jeff Cordova, cofounder and chief executive of IT monitoring startup Wavefront, has left the company.

A few days ago, Cordova joined Sutter Hill Ventures as an entrepreneur-in-residence, a spokesperson told VentureBeat. Cordova held that same role at the venture capital firm about six years ago. Earlier in his career, Cordova was a cofounder and vice president of engineering at contest site Bix, which Yahoo acquired in 2007.

Now Sam Pullara, another one of Wavefront’s five cofounders and a managing director at Sutter Hill, is taking over as chief executive, the spokesperson said. Pullara’s list-sharing startup Bagcheck was acquired by Twitter in 2011. At Twitter he “helped slay the fail whale,” he says on his LinkedIn profile. Earlier in his career, Pullara was an executive at Yahoo.

Wavefront is one of many companies with cloud services for monitoring companies’ data center infrastructure. Others include AppDynamics, LogicMonitor, New Relic, and SignalFx. BMC acquired one of these startups, Boundary, earlier this year.

Wavefront doesn’t say a whole lot about what makes its tool special, although it does say on its LinkedIn page that “the product concept is based on a stream processing approach invented at Google and refined at Facebook and Twitter.” Employees can use Wavefront’s special “stream analysis language” to ask questions and receive answers right away.

The startup was founded in 2013 and is based in Palo Alto, California. Investors include Sequoia Capital, Sutter Hill, and the Webb Investment Network.