He previously was a staff scientist at ICIR (previously named ACIRI) at ICSI in Berkeley, a Senior Staff Researcher at Intel Research Pittsburgh, and Adjunct Assistant Professor at Carnegie Mellon University. His research marries the design of new algorithms and the building of real systems, in the areas of wireless and sensor networks (e.g., GPSR and CLDP for geographic routing), Internet worm quarantine (e.g., Autograph and Polygraph for worm signature generation), and Internet-scale distributed systems (e.g., Open DHT, a public DHT service). Brad holds a Royal Society-Wolfson Reseach Merit Award, given to recruit leading scientists to UK universities.