Yes. The access to the departure levels requires you to pass through security from arrivals them immediately up an escalator to departures. Passport and possibly print out of your next flight required.
These transfer points are at the confluences of concourses B/C/D and D/E/F/G, and this is where transfer desks are also located. I recall usually SQ parks at a Concourse D gate (D is the long central one) so itll be a toss up which transfer point to use.