This page is a walkthrough for the assignment, The Professor: Missing Assistant. It’ll navigate you through the necessary steps to finding Mordin’s assistant.
Find Mordin’s Assistant
This assignment can be picked up, and completed during Mordin’s recruitment mission - The Professor: Missing Assistant During the mission, after meeting with Mordin, he’ll ask you to save his assistant. Soon after the conversation, you’ll find him in a side-room being held by Batarians at gunpoint.
Here you can Either kill (Renegade) or negotiate (Paragon) with the Batarians for his release and then the mission will be completed.