In 1998, at the IBM Laboratory in the Research Triangle Park, Calvignac and his team initiated the IBM network processor activities. He had previously been responsible for system design of the ATM switching products, which he initiated with his team in 1992 at the IBM Laboratory in La Gaude, France. Before that, he had held different management and technical leader positions for architecture and development of communication controller products at the La Gaude Laboratory. Calvignac joined IBM in 1971 as a development engineer in telephone switching products. He received an engineering degree in 1969 from the Grenoble Institute of Technology, France.
- Almost 200 patents according to: Vollmer, Sabine. "IBM tops patent ranking for 14th year.", The News & Observer, January 12, 2007. As of July 24, 2008, a search for Calvignac at the United States Patent and Trademark Office finds 130 patents to his name. Archived December 18, 2010, at WebCite
- IBM Fellows, IBM. Archived December 18, 2010, at WebCite