Need help id'ing Union Naval Officer

[Missouri Rebel]

Hoping someone can help me id this Naval Officer, image made in Cincinnati.

 

[AndyHall]

That uniform most closely resembles a Second Assistant Engineer according the regs from January 1864 to the end of the war.

 

[Rebel from Finland]

I think you better ask @Mark F. Jenkins, the naval expert.

 

[Mark F. Jenkins]

Thanks for the assumption of omniscience .. I can't add anything to what Andy said, unfortunately. I don't believe I've seen that photo before.