John Sterman has won the System Dynamics Society Outstanding Service Award. This award recognizes individuals who have made exceptional contributions to the society over an extended period of time, on a volunteer basis, in a way that benefits the development and advancement of system dynamics, helps the society achieve its goals, and sets a standard to inspire others. Professor Peter Milling, chair of the award committee, noted that awardees are “individuals who besides having exhibited the highest standards of service excellence, dedication, and accomplishment … also have taken initiatives to move the society forward and created positive results for society members and the larger community of people interested in System Dynamics.” He highlighted Sterman’s service in leadership roles on the society’s policy council, as conference program chair, as editor of the System Dynamics Review, and as creator of numerous society initiatives.