Difficulty alone does not establish L-1B. Explain the actual special or advanced organizational knowledge and how the proposed work uses it.
Separate the tasks
General scheduling and stakeholder coordination should not be relabelled as proprietary expertise without support.
Identify the specific process, product, or procedure at issue and document how the employee acquired and applies that knowledge, rather than describing general loyalty or years of service as the qualifying fact. Configuration and change histories, authorship records for internal procedures, training materials and completion records, an organizational chart, and a signed statement quantifying how many staff hold comparable knowledge. The knowledge has to attach to the petitioning company — its own product, service, research, equipment, techniques or procedures, and how those apply in international markets — or be an advanced level of knowledge of that organization’s processes. What the statute forbids is an arrangement that amounts to labour for hire: one where the client principally controls and supervises the worker, or where the placement is not connected to a product or service requiring the petitioner's specialized knowledge.