Francis Albert De Martini (March 31, 1952 – September 11, 2001) was an American architect employed by the Port Authority of New York, the agency that managed the World Trade Center.

He later became the construction manager and was in charge of changing of indoor layouts such as wall removal and plumbing rearrangement at request by the occupants.

[5] On September 11, 2001, De Martini and his colleagues Pablo Ortiz, Peter Negron, and Carlos da Costa, were at their offices on the 88th floor of the North Tower when American Airlines Flight 11 crashed into the building.

[7][8][page needed] Still trying to rescue fellow occupants, De Martini, Ortiz, Negron, and da Costa all died when the North Tower collapsed at 10:28 AM; Hanna was the only one of their crew to survive.

[1] Accounts of De Martini's actions during the attacks were given in the documentaries 9/11: Heroes of the 88th Floor, 9/11: The Twin Towers, and Rise and Fall: The World Trade Center.