He's first shown getting out of the bus at the pyramid and he is part of the crowd when Justin is flying through the air. He's wearing sunglasses and a military veteran looking hat. Then later in the movie he is the person that gets knocked off the guard rail when Agnes screams and Gru slams into it.
Does he have a name? Do we know anything about him? This seems like it might be intended as an Easter Egg, so perhaps the writers or producers have mentioned it at some point?