The ATLAS Simulation Infrastructure is a collaborative effort involving a large number of physicists from around the world. The collaboration includes researchers from various institutions and countries, working together to simulate data for the ATLAS experiment at the Large Hadron Collider. The simulation infrastructure is essential for the analysis of particle physics data, allowing physicists to study the properties of subatomic particles and their interactions. The collaboration includes physicists from universities, research institutions, and national laboratories, with members from over 100 institutions in more than 30 countries. The simulation infrastructure is supported by a network of computing centers, which provide the necessary computational resources to process and analyze the vast amounts of data generated by the ATLAS experiment. The collaboration is dedicated to advancing our understanding of the fundamental nature of matter and the universe.The ATLAS Simulation Infrastructure is a collaborative effort involving a large number of physicists from around the world. The collaboration includes researchers from various institutions and countries, working together to simulate data for the ATLAS experiment at the Large Hadron Collider. The simulation infrastructure is essential for the analysis of particle physics data, allowing physicists to study the properties of subatomic particles and their interactions. The collaboration includes physicists from universities, research institutions, and national laboratories, with members from over 100 institutions in more than 30 countries. The simulation infrastructure is supported by a network of computing centers, which provide the necessary computational resources to process and analyze the vast amounts of data generated by the ATLAS experiment. The collaboration is dedicated to advancing our understanding of the fundamental nature of matter and the universe.