Based out of San Marcos, Texas, Pitbull Metalwerks offers you customized simplicity for architectural fabrication, structural fabrication and construction. This is hot-shot mobile welding. We design, fabricate and build. Why "Pitbull" Metalwerks? Aside from our soft spot for our two pitbulls at home, we chose "Pitbull" Metalwerks because we know that anything with a harsh edge can also be beautiful.