mass-effect-3
A couple missions into the game I got an email from Jondum Bau saying he'd like to meet me at the Citadel Embassies. I'm there and according to the map, I should be standing right on top of him, but he's nowhere to be found.
Where is he and how do I talk to him?
The Krogan DMZ is directly below the Serpent Nebula (which houses The Citadel).
This video shows you where he is:
Note, Thane will not be there for your first hospital visit with Ash/Kaidan (when you go see them and Udina is there).
Look at LessPop's answer for the word description.
Best Answer
He should be on the Citadel Embassies level right outside the C-Sec office. I'm not sure if it matters, but I received the email and talked to him right after completing the mission on Palaven.
Since, given the title, other people might stumble across this question when they're looking for him again later in that quest, he'll be not far from the "5" on that same map above.