Vindicator Aldar is an Alliance-only quest in the draenei starting region Ammen Vale. This quest is not required for  , but gives a few extra XP so it is recommended that you get this quest before . It appears that you must complete the  quest chain from Botanist Taerix before she will offer this quest.
With your help, we were able to find a solution to our problems faster than I could have hoped.
I don't have any other work for you to do. My apprentices and I can handle the rest.
You should go speak with Vindicator Aldar on the other side of the ship.
<name>, is it? I've heard good things about you and the work you've been doing in the short time since you came to.
We'll definitely need your help getting things back to normal. Zhanaa, over there, could also use your help, I'm sure.