No. A widely held certification shows conformity with an external standard rather than knowledge of this organisation. The classification concerns knowledge of the company's products and services, or an advanced level of knowledge of its own processes and procedures, shown through facts about the work performed.
Make the certification a footnote
Mention the credential once, where it is relevant, and spend the rest of the account on the organisation's system and the applicant's place in it. Uniqueness is not required, so there is no need to claim that nobody else understands the system. What is needed is a factual description of knowledge built inside the organisation over time and applied to identifiable pieces of work.
Mention the certification once, where it is relevant, and spend the rest of the account on the organisation's own system and the applicant's place within it. A widely held certification shows conformity with an external standard rather than knowledge of this organisation, and a file leading with it invites the observation that many people hold the same paper. Uniqueness is not required, so there is no need to claim that nobody else understands the system; what is needed is a factual description of knowledge built inside the organisation over time and applied to identifiable pieces of work.
Alongside it sit the separate requirements of a qualifying relationship and the continuous year abroad within the preceding three years.