ATILLA is a state-of-the-art software suite designed for radiation transport simulations, leveraging both deterministic and Monte Carlo methods. Key features include direct CAD integration, allowing users to import geometry from various CAD formats such as SolidWorks®, Pro/ENGINEER®, Inventor®, and CATIA. The software offers a user-friendly graphical user interface (GUI) that simplifies the setup and execution of complex calculations, including automated variance reduction for MCNP, which enhances analysis productivity. ATILLA's deterministic solver provides fast and accurate solutions, particularly suited for applications with large attenuations like radiation shielding. The software also includes advanced visualization options, enabling users to obtain both visual and quantitative outputs for informed design decisions. Additionally, ATILLA4MC integrates with SpaceClaim for direct CAD modeling, providing capabilities for geometry creation, repair, and manipulation, making it a comprehensive tool for radiation transport applications.