Andreessen Horowitz Adds Ex-Opsware Execs

Newbie venture capital firm Andreessen Horowitz is a bit of an enigma, when it comes to its public profile.

On the one hand, it’s impossible to say the firm is in stealth mode, given that Andreessen has done more interviews in the past month than Barack Obama. On the other, Horowitz is apparently in some sort of witness protection program, the firm has no website and doesn’t comment at all about employees whose names aren’t in the masthead. In fact, the only other employee we even know about is Ronnie Conway, and that’s only because poppa Ron told some people about it last week at the Fortune Brainstorm Tech conference.

But thanks to LinkedIn, we know now at least two more members of the Andreessen Horowitz family: Scott Kupor, chief operating officer, and Shannon Callahan, director of human resources and recruiting.

Both are veterans of Opsware, the company Andreessen co-founded (as LoudCloud) and Horowitz ran (before selling it to Hewlett-Packard for $1.6 billion in 2007). Kupor had stayed with HP as vice president and GM of software-as-a-service, while Callahan was director of human resources.

If you know of any additional Andreessen Horowitz hires, let us know… Word back in the spring was that it was looking to build a decent-sized junior staff, and Andreessen mentioned that additional partners could even be added in the future (although there are no guarantees).