Not as stated. Knowledge of a material is industry expertise. What qualifies is special knowledge of the employer's own product, process, equipment or procedures, or an advanced level of knowledge of how that particular company does the work, which is a narrower and more documentable claim.
Name the company's own process, not the material
Hypothetical example: Isabelle builds and tunes injection-moulding tooling at a Wickham plastics plant, and her employer wants to describe her as having specialized knowledge of thermoplastics. Framed that way the claim is a description of an industry, and every experienced toolmaker in the sector could be described the same way. The claim has to be narrowed to something the company owns.
If Isabelle developed the plant's own gate-and-runner geometry for a proprietary part family, or maintains a cooling-cycle standard that exists nowhere else, that is the assertion to make, and the tooling drawings, standards documents and revision histories are the proof. Two conditions travel with it and are easy to overlook: one continuous year of qualifying employment with the Wickham company within the preceding three years, and a relationship of parent, branch, subsidiary or affiliate between the two entities with both actively doing business. A strong knowledge claim does not survive a missing corporate relationship.
- USCIS: L-1B intracompany transferee specialized knowledge
- USCIS Policy Manual, Volume 2 Part L: intracompany transferees
- USCIS: L classification documentation and evidence
- 8 U.S.C. 1184: admission of nonimmigrants and the specialized knowledge definition
- Department of State: 9 FAM 402.12, intracompany transferees
- USCIS: Form G-1055, fee schedule