When he returned to the US in 1998, he joined [[ISC]] as its Executive Director. He worked there until 2001 and then founded [[Nominum]]. He held the post of CTO at Nominum for four years. David also served as a board member of the North American regional [[IP]] address registry, [[ARIN]], from 2000 to 2005 and as ARIN treasurer from 2004 to 2005.<ref>[http://www.internetgovernance.org/pdf/DC-May17symposium-final.pdf internetgovernance.org]</ref> | When he returned to the US in 1998, he joined [[ISC]] as its Executive Director. He worked there until 2001 and then founded [[Nominum]]. He held the post of CTO at Nominum for four years. David also served as a board member of the North American regional [[IP]] address registry, [[ARIN]], from 2000 to 2005 and as ARIN treasurer from 2004 to 2005.<ref>[http://www.internetgovernance.org/pdf/DC-May17symposium-final.pdf internetgovernance.org]</ref> |