MANILA, Philippines—From quake-devastated Haiti to the killing fields of Darfur to hurricane-ravaged New Orleans, a Filipino-American “techie-preneur” shows how the Internet can be used to respond quickly and effectively to calamities.

Yobie Benjamin, 50, formerly from flood-prone Malabon City, is an Internet security expert who uses his cyber proficiency to raise emergency funds to aid victims of disasters and social injustice, as well as other advocacies.