Tier 2 Centers
The Tier 2 centers for the US ATLAS collaboration are situated strategically across the United States.
Tier 2 facilities take on a range of significant roles in ATLAS, such as providing calibration constants, simulation, and analysis. Tier 2 facilities also provide analysis capacity for physics working groups and subgroups, as well as all of the required simulation capacity for the experiment.
Information for Tier 2 site administrators can be found here.