You can find the Environmental Engineering student group in the building no. 9 on the Vaihingen campus, right next to the Mechanical Engineering & Co. student group on the ground floor.
Simply leave the S-Bahn station “Universität” in the direction of the university. When you reach the top, turn slightly right and you will already see the building no. 9. Enter through the entrance, turn right to the green door and voilà: there’s our neat student group room.

The student group room does not have fixed opening hours, but is open when someone is there. This is actually always the case during the lecture period, and during the semester break you are welcome to call in advance or ask in some other way.