Reliance on an employee can be relevant context but does not itself prove specialized knowledge. Describe what the employee knows about the organization and how the proposed assignment uses it.
Explain the judgment behind the call
A reputation for being helpful is different from evidence of advanced process knowledge. Use a concrete decision that required understanding of internal dependencies rather than a statement that the applicant is always available.
The statute defines specialized knowledge as special knowledge of the petitioning company's product, service, research, equipment, techniques, management or other interests and its application in international markets, or an advanced level of knowledge of the company's processes and procedures. The petition should itemize what the transferee will actually do, which company product or procedure requires special or advanced knowledge, how the employee acquired it, and why interpreting would not deliver the same work. The knowledge must belong to the company, not the profession: a strong general skill is not specialized knowledge. USCIS looks for indicators such as whether the knowledge is proprietary, how many others in the organization hold it, how it was gained and whether it can readily be transferred to another worker.
Identify the organizational knowledge used to diagnose or address the issue and how the employee acquired it.