1) it's a pronoun or adjective. Great question! See below google definition and examples: Synonyms: determiner, predeterminer, & pronoun determiner: such; pronoun: such 1.of the type previously mentioned. "I have been involved in many such courses" 2.of the type about to be mentioned. "there is no such thing as a free lunch" 3.to so high a degree; so great (often used to emphasize a quality). "this material is of such importance that it has a powerful bearing on the case" See below definition from dictionary.com adjective of the kind, character, degree, extent, etc., of that or those indicated or implied: Such a man is dangerous. of that particular kind or character: The food, such as it was, was plentiful. You can actually use "such" along with a noun, that is also why "such" is considered a either pronoun or adjective therefore it can go with other nouns. Like for example, "such predators like the great white shark and the lions can be on top of their food chain..." "...such as fruits and veggies are better for your health..." "such a skill to maintain may take a lifetime..." Why they word the "such" in that sentence is trying to relate to the noun or modify it like describing it. I would use, "the executive office also consists the immediate staff such as..." don't word it with "office of management", it's like you're repeating yourself. If you want to describe that the executive office "consists of all departments, such as the It department, the HR department..." 2) list and listing are synonyms of each other. Either way if the author were to substitute each word, it will still be in the same meaning because it's still offering a "list". Also see examples with dictionary.com Again, I can't guarantee or promise everything I say is correct. So I'm always referencing and also do your research too. :)

1) I see either used, but I personally use "such as" without any words between. 2) In this case, the noun is "a listing". The other place something similar shows us is, for example, "a real estate listing", where you would see a specific house listed for sale. Not sure why the difference occurs in your specific example, but you specific example does seem correct to a native speaker.