English to Spanish Bus/Financial Finance (general) Workstation

Context:
By appointing key ambassadors within the business to educate other workers about best practice, to get the most out of using their Workstations and Active Working generally, the benefit will be felt much quicker and you’ll maximise the return from your investment; with a more engaged workforce, lower absence rates and a greater competitive advantage when retaining and attracting the best talent.

Note: the term key before any title seems easier than one may be inclined to think. Some options that come to mind off the wall and based on the research done include 'clave', 'principal', 'destacado', however none of them make sense to me. Perhaps you can come up with some suitable contributions.

Thanks