And in my division the E5 is also...
Project manager.
Team lead.
Software lead.
Module lead.
Database lead.

Haha all the self invented job title.

And some E5 also clueless that those job title are given by their M3 or M4 to give them some self worth la. On paper. They are still just project engineer. Lowest paid engineers.

But some don't get the hint will put in their email title..
Team lead.
Or software lead...

If they change the perception that lead are the one who get paid the lowest but do the most.
Nobody want to be "lead" la

Everyone have this delusion that lead means = higher pay. Do less. Just tell people to do.
Hence you see alot of lead. Dunno anything one. Just know how forward email