Complex sentence: Menendez, served the City with distinction on the Small Business, International, and Ethics committees, but his most important work was as the Co-Chair of the City's Community Revitilization Action Group.
Split into simpler sentences: Menendez, served the City with distinction as serving on the Small Business, International, and Ethics committees. His most important work was as the Co-Chair of the City's Community Revitilization Action Group.