Fortisphere Inc. has replaced Michael Harper as CEO with the hiring of Siki Giunta.  According to the Baltimore Business Journal, Giunta joined the virtualization company a month ago.

It says she was hired for her background at Managed Objects, a Northern Virginia firm bought by Novell last year.  Giunta built Managed Objects from a pre-revenue startup 10 years ago to its $50 million sale.  Prior to that, she was senior vice president of Computer Associates Marketing for OS/390 Solutions.  Giunta also sits on the boards of Layer 7 Technologies and BEZ Systems