The article notes that...
"The Nassal Company has previously worked with competitors Universal, where it fabricated and installed all of the scenic sets for The Amazing Adventures of Spiderman at Islands of Adventure, and its faux rockwork (emphasis added), themed retail, and interior queue themeing at the Wizarding World of Harry Potter."
Doesn't Disney do it's own rockwork, usually led by Zsolt Hormay? I'm unsure who exactly did the rockwork for Carsland and Pandora, but do they typically contract out and WDI oversees?