Systems engineering principles have been percolating in the systems engineering community for 30+ years. Based on the work done these past three decades, INCOSE has produced this first formal set of systems engineering principles peer reviewed by our sister organizations: AIAA, IEEE, and NDIA. These principles are an initial set to help advance the discipline of systems engineering in application of the systems engineering processes, provide an indication of the basis of systems engineering, and spur further systems engineering research. INCOSE is excited to provide a further step in the advancement of the Systems Engineering discipline through the publishing of this first set of principles. It is hoped and expected that additional principles will be discovered/realized and that changes in the understanding of systems engineering practice or progress in the definition of the basis will lead to further updates of this set of principles.