BOULDER - The recent departure of chief technology/information officer Marty Snella and the rapid growth of the company has led to a restructuring of sorts in recent weeks for bandwidth infrastructure provider Zayo Group LLC.

Snella's resignation was effective May 1 and termed a termination without cause, according to a filing with the Securities and Exchange Commission. Snella cashed in $9 million-worth of shares in the company upon leaving, the filing noted.

Zayo Group's director of corporate marketing Emily Dempsey said Snella, who had been with the company since 2007, left of his own accord for personal reasons.

"Everyone is very sad," Dempsey said. "Everyone at Zayo really likes him a lot. He's really well-respected by executives and people he works with on a day-to-day basis."

Dempsey said Snella had spent a lot of time over the past couple of years focusing on some of Zayo's larger high-end installation projects rather than serving in a "generalist CTO role."

Snella's positions of CTO and CIO will not be continued. Instead, former president of sales David Howson takes over many of Snella's responsibilities, and takes on the newly created title of Chief Network and Services Officer and Head of Europe.

Chris Morley, former president of a couple of Zayo's product units, fills Howson's former role and becomes president of sales and marketing.

Those changes are among a couple of other shuffling of duties among Zayo executives.

Dempsey said the restructuring came from a combination of Zayo's growth, Snella's departure and chief executive Dan Caruso wanting to rotate some roles around.

"None of our products and structures have changed," Dempsey said. "It was just time for a little rebalancing."