Manufacturing　companies　in　today＇s　industrial　world　are　seeking　to　use　the　new　manufacturing　process　methods.　The　primary　goal　of　corporations　is　to　achieve　optimum　production　while　deploying　minimal　capital.　The　fundamental　purpose　of　this　study　is　to　examine　the　influence　of　various　lean　manufacturing　practices　on　the　sustainability　performance　of　companies　and　the　mediating　role　of　green　supply　chain　management　(GSCM).　The　data　was　gathered　using　questionnaires　from　250　Pakistani　manufacturing　firms　and　analyzed　using　AMOS　25.　Results　demonstrate　that　process　and　equipment,　product　design,　supplier　relationships,　and　customer　relationships　significantly　affect　sustainable　performance.　It　is　also　recognized　that　Green　Supply　Chain　Management　mediates　the　interaction　between　HR　processes,　product　design,　supplier　relationship,　customer　relationship,　and　environmental　performance.　The　findings　of　this　study　will　enable　managers　and　decision-makers　of　manufacturing　companies　to　increase　sustainable　efficiency　and　reduce　waste　through　the　use　of　lean　manufacturing　and　GSCM　implementation.