Bachelor in History and Environmental Studies, Yale University, New Haven, 1987.
Associate editor Animals' Agenda magazine, 1987—1988. Executive director anti-hunting group Fund for Animals, 1988—1994. Various positions including senior vice president communications & government affairs, chief lobbyist & spokesperson Human Society United States, Washington, 1994—2004, president, Chief Executive Officer, since 2004.
Co-founder, board directors National Federation Humane Societies, since 2006. Founder Humane United States of America, Humane Society Legislation Fund. Board directors Global Animal Partnership.
Guest instructor United States Fish & Wildlife Service Refuge Training Academy.
Married Kirsten Rosenberg.