In this chapter we focus on the invisible social structure of a leading ICT ecosystem sustaining a knowledge cluster in microelectronics, embedded software and nanotechnology, around Grenoble, France. Minalogic fosters key enabling technologies underpinning growth and competitiveness, from its beginning in 2005 and up to now. We map the network architecture of the Minalogic cluster through 107 collaborative projects supported by both government and industry, for the past decade or so. We use social network analysis and visualization to identify and pinpoint the key actors in the socio-technical networks that underpin and drive collaborative innovation in France and beyond. The centrality measures and ‘small world’ connectivity of the ecosystem highlight the leading role that a public research center, CEA Grenoble, plays in the ongoing development of this ICT ecosystem. We also discuss the role of ‘new Argonauts,’ such as Presto Engineering, returnees from Silicon Valley with operations in France and Israel, who occupy peripheral positions in the Minalogic cluster.