Nimbula, the Cloud Operating System Company, today announced that it has secured $15 million in its second round of venture capital funding led by Accel Partners. Current investor Sequoia Capital, which led Nimbula's first round of venture financing, also participated in this round. In addition, Nimbula announced that Accel Partners' Ping Li has joined the company's board of directors. The new funding will be used to continue the company's investment in innovation around hybrid cloud computing technologies and to drive market adoption of Nimbula's product offering for the management of on- and off-premises infrastructure.

Nimbula, which emerged from stealth mode in June 2010, was founded by former Amazon executives Chris Pinkham and Willem van Biljon, who led the development of the Amazon EC2 public cloud service. Nimbula's business and technology focus is on blending EC2-like scale, agility and efficiency with private infrastructure customization and control.

"Accel Partners has a superb track record in identifying winning technology companies in high growth markets, and we are delighted that they recognize the value of our vision by joining our team," said Chris Pinkham, co-founder and CEO of Nimbula. "Together with Sequoia Capital, Accel Partners brings valuable insight and acumen along with proven entrepreneurial spirit which will help to guide and fuel our growth in the fast-growing multibillion dollar cloud computing space."

"We have been active in the private cloud computing space and spoke with many customers looking for a solution," said Ping Li, Partner at Accel Partners. "We identified Nimbula as the only vendor having the technology and proven experience to capture the leadership position in this growing market. We look forward to rolling up our sleeves and working with the team as they build a great company."

"Nimbula has moved with extraordinary speed and agility having started from two founders quietly developing their offering in Sequoia Capital's offices to emerging as a leader in private cloud infrastructure," said Roelof Botha, General Partner at Sequoia Capital. "We are proud to continue our partnership with Chris and Willem during this pivotal growth phase as they bring their solution to market."