The Science and Technologies for Phosphorus Sustainability (STEPS) Center is a convergence research community of diverse and leading scientists. We are addressing the complex challenges in phosphorus sustainability by integrating disciplinary contributions across the physical, life, social, and economic sciences. STEPS draws from atomic and molecular insights (e.g., chemistry, materials research, biochemistry, bioengineering) to develop materials and technologies that are deployed at the human scale (e.g., environmental and agricultural engineering, plant biology, crop and soil sciences) while considering supply-chain logistics, life cycle, and other regional and global issues (e.g., ecology, economics, sociology, policy). STEPS further leverages disciplinary contributions that transcend length scales and serve as integration mechanisms within the Center (e.g., science of team science, data science).