Seniority alone does not establish the applicable knowledge standard.
Explain what experience produced
Identify actual expertise and its relevance to the assignment. Do not assume that every year in the company involved the same duties or that newer colleagues necessarily lack relevant knowledge.
The foreign qualifying employment normally must last one uninterrupted year inside the applicable three-year period, and the US role must use knowledge that is special or advanced in relation to the organization’s products, services, research, equipment, techniques, management, or procedures. A developer's long experience with widely available tools is not enough by itself, while special or advanced knowledge of an internal platform may qualify even if it is not proprietary or unique. Mark later summaries honestly, explain missing records, and show why the applicant's knowledge concerns this organization's interests or reaches an advanced level in its processes rather than reflecting ordinary occupational ability. A hard-to-fill position, general technical experience, or an unsupported claim that someone is indispensable does not by itself establish this category, and qualifying foreign employment remains a separate requirement. Specialized knowledge may be special knowledge of the employer's own processes or an advanced level of knowledge of them; neither is established by a certification held generally across the field, and neither requires the knowledge to be unique or secret. A reviewer needs the internal process, the employee’s access to it, the reason it matters to the proposed role, and evidence that ordinary practitioners would not possess it through general industry experience.