He also served as a field producer for CNN International, covering the NATO airstrikes against Serbian forces in Kosovo.

In 2001 Bellini spent months in New York City covering the aftermath of the September 11 attacks as the crisis evolved into an international war on terrorism.

Bellini received a gold medal from the New York Festivals for "Jason's Journal: The Holy Land", a program he produced on the Israeli–Palestinian conflict.

In February 2003, Bellini was part of the team of CNN correspondents and anchors that covered the breaking news story of the Space Shuttle Columbia tragedy.

From 2013 to 2014, Bellini was a frequent guest on FOX NEWS' On the Record w/ Greta Van Susteren.

In 2017, Bellini began hosting and producing a WSJ video series called "Moving Upstream."