Materials such as soils, rocks, concrete, and ice are heterogeneous and complex. Advanced computational modeling techniques for capturing the mechanical and multiphysics behavior of these materials are essential in engineering applications related to energy, civil infrastructure, and the environment. This mini-symposium will provide a forum for presentations and discussions of the state-of-the-art and state-of-the-practice in computational geomechanics. Topics of interest include but are not limited to (1) development, implementation, and validation of advanced constitutive models in geomechanics; (2) particle-based numerical methods (DEM, MD, MPM, Peridynamics, etc.); (3) computational models and algorithms for multiscale and multiphysics problems; (4) numerical modeling of fracture, damage, and fragmentation processes; (5) local/nonlocal theories and models (mesh-based and mesh-free); (6) implementation and case studies of numerical methods in geo-energy, geo-hazards, and geo-environmental applications; (7) validation and verification of numerical models and algorithms in geomechanics; (8) machine learning and data-driven approaches in geomechanics; and (9) new challenges and opportunities (geomechanics in extraterrestrial exploration, nature-inspired geomechanics, metamaterials, etc.).