Electrical, computer, and SW.
I'm not saying communicating well is not needed. I'm saying writing well is not needed. What I've seen: A good presentation (including PPT skills) is much more valued than writing. Decisions are usually made because of them, not because someone wrote a good brief outlining positives/negatives. Emails longer than a few lines tend not to be read, so people don't focus on it. Documents are usually not read by many except those beneath them, etc. I almost never see a senior management write anything of substance unless it is required by Legal/HR - they'll always get an underling to write them (and no, writing them is not how underlings become senior management).
I'm not saying I like the state of affairs, but it is how I've seen it.
