Help with one sentence

Hello everybody. I hit the linguistic wall and need your help.

I'd like to say: In the future, I would like to work on a larger scaled projects. By projects I mean architectural projects.

I can start with:

Dans le future, je voudrais...

or

A l'avenir, je voudrais...

Next issue:

..., je voudrais travailler sur les projets à grande échelle.

or
..., je voudrais travailler aux projets à grande échelle.

or

..., je voudrais travailler sur les projets de plus grande échelle.

I hope that makes sense. :/