Before you can see Lord Vader, you need to complete the quests of Kaja, Loam, Hethrir, Thrawn, Veers and The Emperor, in that order.

Vader is located by where you went to see Colonel Veers and Captain Thrawn. In the hallway there, instead of making a left towards the balcony door, proceed straight, then make the first left, then immediately a right through a pair of large machine doors. There will be two stormtroopers there waiting and you know you have the right room. Walk directly across the room towards the curved part in the wall and once you are standing almost right on it, it will open and Vader will be standing there.

This is part one of a two part deal with this information broker. The first mission is a simple delivery mission. Approach him, talk to him, return to vader. Easy enough.

Easy drop off, no nasties.

Reward: 40 Imp FP and 500 Credits.