The International Council on Systems Engineering (INCOSE; pronounced /ɛn-koʊsi/) is a not-for-profit membership organization and professional society in the field of systems engineering with about 26,000 members and associates[1] including individual, corporate, and student members.

INCOSE's main activities include conferences, publications, local chapters, certifications and technical working groups.

[4] In collaboration with the IEEE Systems Society[5] and the Systems Engineering Research Center (SERC)/Steven Institute of Technology,[6] INCOSE produces and maintains the online Systems Engineering Body of Knowledge (SEBoK)],[7] a wiki-style reference open to contributions from anyone, but with content controlled and managed by an editorial board.

INCOSE certifies systems engineers through its three-tier certification process,[8] which requires a combination of education, years of experience and passing an examination based on the INCOSE Systems Engineering Handbook.

INCOSE's International Council on Systems Engineering Standards Technical Committee (STC) is working to advance and harmonize systems engineering standards used worldwide.