Hello there :D
Really it's good news to see that you want structural design :)
I'm building engineer collecting between the architectural, structural, mechanical and electrical design to avoid the problems appearing when the architectural design happening alone without other designs and I think that make me one of the most appropriate people for this job.
I'm also happy to see your job description because I’m a 3D/BIM expert, can design the spaces based on your requirements, visualizing the exact details, rendering photo realistic shots and more.
Definitely the real works more powerful than the word’s so kindly take a look in my freelancer portfolio which includes Architectural and structural designs using Revit 2016. I'll be happy to answer any questions you may have and discussing the details.
Revit 2016, Lumion 8, Dialux Evo, Ecotect, Insul 8 and more.
Best regards.