From what I remember, the upper limit is five years, but most "missions" are limited to three years because justifying so much time becomes complicated for comp

From what I remember, the upper limit is five years, but most "missions" are limited to three years because justifying so much time becomes complicated for companies. But legally, missions should be very specific, short, with SSII-provided material, and no imposed office hours... so far, haven't seen a single IT/CS consultant used as required by law.