[6] Greco is a member of the Connecticut and Florida Bar Associations; and has been on the boards of directors for the Lender School of Business at Quinnipiac University, Fazoli's Restaurants, Inc., the Connecticut Food Bank, the Greater New Haven Chamber of Commerce, Circle Peak Capital, Share Our Strength: Dine Out, The UCAN Company, and the International Dairy Foods Association.

[7][8][9][10][11][12] He is on the boards of True Drinks Holdings, Inc., a publicly traded beverage company, Republic Fire Protection, Inc., and the Palm Beach County Food Bank.

[6] Greco executed one of his first turnarounds at Ellington, Connecticut-based Natural Country Farms, a manufacturer of private label and foodservice fruit juices, where he was COO for five years.

[25] On November 13, 2009, he oversaw their eleventh and largest acquisition[26] to occur during his tenure, when Bruegger's purchased the holdings of Timothy's World Coffee.

[29] During his tenure, Le Duff America was the parent company of the restaurant chains Bruegger's, La Madeleine, Mimi's Cafe, Brioche Dorée, Timothy's World Coffee, Michel's Bakery Café, mmmuffins, as well as several others.

[34] Confident about Sbarro's prospects, he designed a short-term strategic plan calling for a focus on "people, place, product and positioning.

"[35] Longer term, he implemented plans to shift Sbarro from its quick-service, food court based, status into the fast casual arena.

[38] His changes also included an increased emphasis on employee hospitality and a shift from its shopping mall focus to a more store front oriented concept.

[35][40] Since leaving Sbarro, Greco has held a number of interim executive leadership positions and consulting assignments.