The funding round was led by Boulder Ventures and Intersouth Partners and also involved NEA founder Frank Bonsal, Sourcefire’s chief marketing officer, Michele Perry, Amplifier Venture Partners, and the Maryland Department of Business and Economic Development (DBED).

The deal sees Jonathan Perl from Boulder Ventures and Don Rainey from Intersouth Partners join Zenoss’s board of directors.

The Annapolis, Maryland-based company offers support services for the Zenoss open source systems management project, which was launched in February 2006, as well as training and professional services.

In May Zenoss was one of the founder members of the Open Management Consortium, alongside Ayamon, Emu, Qlusters, Symbiot and Webmin, as the companies attempt to raise the profile of open source systems management alternatives to the likes of CA, HP OpenView, BMC and IBM Tivoli.

Another OMC member, Hyperic Inc, raised $3.8m in first round funding in June.