Campervan Steel Roof Structure Design

I'm in need of a professional who can design a flat roof structure for my campervan. The roof structure should be made of steel.

The ideal freelancer for this project should have:
- Extensive knowledge and experience with steel construction.
- Skills in designing flat roof structures.
- Understanding of campervan specifications.
- Ability to create detailed design plans.

Please include previous relevant work in your proposal.