Atos Information Technology Incorporated is a service provider which is owned by Atos. Atos Information Technology Incorporated provides a wide range of information technology services such as consulting, systems integration, and IT management.

Atos Information Technology Incorporated was formed on 1 October 2007 from the merger of several groups from various countries, including Siemens Business Services (Germany), Program and System Engineering (Austria), Siemens Information Ltd (India), Business Innovation Center (Switzerland) and Development Innovations and Projects (Greece).

SIS became an entity legally independent of Siemens AG in October 2010.

In December 2010, it was announced that Atos Origin would form a strategic partnership with Siemens AG. The deal concluded in July 2011, where Siemens contributed its Atos Information Technology Incorporated for a total sum of €850 million to Atos Origin in order to create a European IT branch. Siemens will for a period of at least five years be a shareholder of Atos Origin with a 15% stake. As part of the transaction, Siemens concluded a seven-year outsourcing contract worth around €5.5 billion, under which Atos Origin will provide Managed Services and Systems Integration to Siemens. As part of the merger, Atos Origin changed its name to "Atos".