Been discussed before
As a new ACISS Soldier expect to be posted to a Brigade HQ&Sigs, although some new troops have been posted directly to a combat arms unit and base comm sqn. Sigs are in a lot of different units, so you can get quite the variety of postings in your career. HQ&Sigs, JSR, Infantry, Armour, Artillery, Engineers, Tac Hel, Comm Sqn, etc
I did 7 years as a Sig Op/ACISS and never spent a day in a Sigs unit, aside from being posted to CFSCE for QL3.