Vivisimo, a provider of clustering, search, and meta-search software for organizing search results, has announced plans for the expansion of its Pittsburgh headquarters in a new location and for the establishment of a Paris office. Vivisimo also announced the hiring of three employees to help lead customer support, community affairs, and European operations for the company. Leading Vivisimo's new Paris office will be Denis Harscoat, director of European sales. Paul Chilensky joins Vivisimo as senior director of customer support. Anne McCafferty also recently joined the company in the role of director of community and public affairs.