The Simulation Interoperability Standards Organization (SISO) focuses on facilitating simulation interoperability and component reuse across government and non-government applications worldwide. SISO seeks to provide a forum for the interchange of new ideas, concepts, and technology across the broad Modeling and Simulation (M&S) community; to disseminate these ideas; to educate M&S practitioners and sponsors regarding their implementation; and to support the development of standards products for use in various applications.

SISO is an international standards organization that is responsive to the broad M&S community and develops standards and products using a range of options including International Standards Organizations (such as the Institute of Electrical and Electronics Engineers, IEEE), National Standards Organizations and SISO products. When SISO products are developed, the SISO Policies and Procedures will apply. When using international or national standards (bodies), a relationship will be established and mutually agreeing policies and procedures will be negotiated.