Going To The Office, Arriving At The Office, Coming To Work
noun, verbal noun
If you exit somewhere in order to go to your company, that's going to the office, arriving at the office, and coming to work.
しゅっしゃ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. Just watch out for the しゅつ, which gets changed to しゅっ, as many つs do in this situation.
今日は一人で出社ですか?
Are you going to the office alone today?
すみません、社長はまだ出社してないんです。
I'm sorry, the president hasn't come to work yet.
出社する前にカフェに行きました。
I went to a cafe before going to work.