Echelon marquis sniper perch?

Has anyone else run into this? I was running across the bridge and the enemy Marquis was shooting me from a rooftop near their tunnel area I think. I was getting shot and could’t see him. I followed the bullet trails and they were coming from a roof where I saw the players name. Is this a thing or am I going crazy?

I’ve seen a Marquis camp on one of two pillars near the mid thrall camp (like overhanging a free fall to death). That’s all I know about though (and it wasn’t very effective).