Ranger Grant

Grant is a Ranger from the NCR who is your contact near endgame. He is there to help you coordinate safety during President Kimball's visit and speech if you are on good terms with the NCR.

Appearances
Grant appears in Fallout: New Vegas.

Bugs
It is notable that he becomes unresponsive for the quest, For the Republic, Part 2. This occurs if the player has advanced too far through the Wild Card quest(If Yes Man tells you to save the President). He simply stands there as though he is in combat, with his teeth gritted. This can be fixed with console commands on the PC(See For the Republic, Part 2). However, if you are on the PS3 or Xbox, this quest cannot be completed. The only thing you can do is reload a previous save and save the president in another manner not involving Yes Man.

Even if you managed to ally the brotherhood of steel and NCR, wearing any brotherhood of steel armor will make him hostile

If you inform Ranger Grant in person after killing the Legion Sniper on the tower during the quest You'll Know When it Happens he will sounds as if he is talking to you through a radio even though you are standing in front of him.