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Hi,
HBS specifically ask two recos from professional sources. Three more questions -
1) Does the pro bono work qualify as professional recommendation? The work was about creating performance management system for non-profit hospital group. The 'volunteering, pro bono' will only make a good third recommendation. Isn't it?
2) I am worried a second professional recommendation will not add any more insight than the first recommendation. However, I am very actively involved in many office-wide initiatives, including starting communication group in office. Can I get someone from my organization to write about this? Does this qualify as a professional recommendation?
3) Does professional recommendation mean only the project work context?

Thank you so much for your help!:)