Dear Important Douchebag,
You might remember me, I've done a lot of the work that you and members of your group have passed off in communications to the customer as being your own work. I was a bit surprised when a customer contact looking for information came back to little old me. Because it seems like you sent them some instructions to use a piece of equipment provided by us and failed to indicate the part number or anything specific about that equipment. Then when you tell me it was a piece "made by engineering" I really have to wonder. Because I work in engineering and what we typical do here is put a fucking part number or name on something. We don't just make something and send it off to fairy land with nothing telling you what the hell it is or what you're supposed to use it on.
So when you calmly tell me there's no fucking part number I really have to wonder who's driving this thing and why some total fucking douchebag like you gets to take constant credit for my analysis and reports and then sends the customer a fucking instruction to use a fucking part that they have no fucking idea what it is. I'd really like your job because it probably pays 3-4x what I make and I wouldn't have to use my fucking brain which sounds great.
No fucking thanks to you asshole,
Your Mechanical Engineer