HereisabriefintroductionfortheISSMGETechnicalCommitteeProceedingson"Soil-StructureInteractionforUndergroundStructuresandRetainingWalls":Thispublicationcompilesthelatestresearchandcasestudiesonsoil-structureinteraction(SSI)relatedtoundergroundstructuresandretainingwalls.AspartoftheISSMGETechnicalCommittee'swork,theproceedingspresentadvancementsinanalytical,numerical,andexperimentalmethodsforunderstandingthecomplexbehaviorofgeotechnicalstructuresinteractingwithsurroundingsoil.Keytopicsincludeseismicresponse,deformationmechanisms,designoptimization,andinnovativeconstructiontechniques.Thepapersprovidevaluableinsightsforengineersandresearchersworkingonundergroundinfrastructure,deepexcavations,andearth-retainingsystems,contributingtosaferandmoreefficientgeotechnicaldesignpracticesworldwide.