local experts, and visiting speakers who can be asked to speak and help train your team. Building a proper environment for allowing the speakers to talk is key. Mentors would like Recognition, Publicity or event a good audience.
to get smaller and smaller and turn into new groups. You often will see that small groups of people split off and form new initiatives. Important is to have clear goals and mandates and to be able to work with these groups on projects when the goals are in harmony.