E-commerce services provider ChannelAdvisor is getting a new chief financial officer: Red Hat’s Mark Cook. It’s the second big management change for ChannelAdvisor since May.

ChannelAdvisor (NYSE: ECOM) disclosed after the markets closed Tuesday that its current CFO, John Baule, is retiring as of Aug. 31. He will remain with the company through Sept. 30 as an advisor.

Baule joined ChannelAdvisor in November 2012 and helped take the company public through an IPO.

Cook takes over as CFO effective Sept. 1.

In May, ChannelAdvisor co-founder Scot Wingo stepped away from the chief executive officer role and now is chairman.

David Spitz, who had been ChannelAdvisor’s chief operating officer, replaced him.

Cook is vice president of finance and is the controller at Red Hat (NYSE: RHT). He’s worked with the world’s top open source software firm since 2007. Previous experience includes stints at RJR Nabisco, Blount, Worthington Industries, Guilford Mills and Cluett American Corp.

Frank Calderoni, a former Cisco executive, took over as Red Hat’s CFO in June when his predecessor, Charlie Peters, retired.

“We are excited to have someone of Mark’s experience and caliber joining our senior leadership team,” Spitz said in the hiring announcement.

“With over 30 years of financial experience, including over a decade of increasing responsibilities at Red Hat during a period of significant growth, we believe Mark will contribute significantly to supporting our organization as we scale to the next level.”

Spitz also praised . “John has been instrumental in helping to launch ChannelAdvisor as a public company and in building a strong and durable finance function capable of meeting the many demands of being public and we thank him for his efforts.”

In a statement, Baule noted: “It has been rewarding to have helped launch ChannelAdvisor as a public company and lay the foundation for future growth. II would especially like to acknowledge one of the best finance teams with which I have had the pleasure of working. I am confident this team is well-positioned to support ChannelAdvisor as it moves to capitalize on the significant market opportunity in front of it.”