I am a computer scientist in the Networking and Security Group at the International Computer Science Institute (ICSI). I am also adjunct faculty in EECS at Case Western Reserve University. Prior to joining ICSI in 2003, I worked for BBN Technologies' Internetwork Research Department at NASA's Glenn Research Center for six years. And, prior to that I was part of Shawn Ostermann's Internetworking Research Group at Ohio University. My current research interests are in the areas of network architecture, network measurement, security, transport protocols and congestion control.

News:

• A new version of the tcpsplit tool was released in March 2025.
• I am teaching CSDS 426, a seminar on Internet measurement, this semester.
• Omar finished his thesis in August 2024. See details here.
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