It can be, if his knowledge of this company's product, processes or procedures is special or advanced rather than merely general expertise in timber-panel fabrication. The petition should show how the knowledge differs from that generally held or is advanced relative to colleagues and how he acquired it; it need not prove that a US hire is unavailable.
The difference between skilled and specialized
USCIS distinguishes an employee who is very good at a trade from one who has special knowledge of the company's products or an advanced level of knowledge of its processes and procedures. The knowledge need not be proprietary or unique, and the inquiry is not whether a US worker is available. Hypothetical example: a Lake Country panel manufacturer's planner has spent six years developing routing sheets, jig calibrations and a defect-tracking routine that the company treats as proprietary; that evidence may support the claimed knowledge.
If instead his skill is limited to reading architectural drawings and scheduling a cutting line in the ordinary way, the case may fail no matter how valuable he is. The petition should include the internal documentation he authored, training records showing he teaches the system, and a comparison with ordinary industry practice and similarly employed workers. It should show he holds the knowledge at an advanced level and that the proposed duties require it.