Maat is a Consulting Firm delivering IT solutions and professional services to improve business process performances. Maat has developed major applications in the Healthcare area in Spain, in particular for Hospitals data management and integration. The Health-e-Child grid is based on the Gateway software developed by Maat. Building on its work within the Health-e-Child consortium, Maat will be the work package leader for WP4 that extends the grid to the US and integrates additional software components with the Gateway. David Manset, the lead architect of the Health-e-Child healthgrid will lead the expansion of the grid both geographically and technologically.