First: I do love the simple and straight characters and lines for the "ISS" and "Int Sales Support" part. They are the right font, correctly spaced, lined up, it makes the "international" part stand out. Simple and effective.
Second: I'm not sure what to make of the ISS logo design although I think I see where you going with this have the infinite "I" rapped around a globe.
However, just the two S' in the center might leave a bad taste in some European countries if you know what I mean.
I rather not go this route.
I can imagine you're thinking to put the "I" now inside the globe as well but I think it might look to much as some existing design already put forward.
I do like the globe slightly behind the "ISS" as on #158. Let see what my partner says later today. As mentioned in the generic comment section, I'll be out most of the day today so it will be hard to give a lot of feedback before closing of the contest.