A professional who influences innovation decisions in a direction believed desirable by an organization is

Change agent

Explanation:

Change agent could come from either inside or outside of the organization. Typically, a person can obtain the influence to be a Change agent if they possess one of the two criteria:

1st : They possess high amount of ownership within the organization. Which mean that if that person want something to change, there's nothing that other people within the organization can do to prevent it.

2nd : They possess a respectable level of experience and expertise that made the people within organization feel secure in following their advise/proposal.

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