John Sides is an associate professor in the Department of Political Science at George Washington University.
Deborah Siegel is a writer and consultant living in New York City. She is the author of Sisterhood, Interrupted: From Radical Women to Grrls Gone Wild (Palgrave Macmillan). You can read more about her work at www.deborahsiegel.net and on her blog, Girl with Pen.
Marc Siegel is an Associate Professor of Medicine and a Fellow in the Master Scholars Society at New York University School of Medicine.
Reva Siegel is Nicholas deB. Katzenbach Professor of Law at Yale University.
Micah L. Sifry is a senior analyst with Public Campaign.
John Sifton is a researcher in Human Rights Watch's Terrorism/Counterterrorism division. He travels regularly to Afghanistan and Pakistan.
Leon V. Sigal is the director of the Northeast Asia Cooperative Security Project at the Social Science Research Council and the author of Disarming Strangers: Nuclear Diplomacy with North Korea, published by Princeton University Press.
Daniel W. Sigelman is an attorney in Washington, D.C. During the 1980s, he was counsel to a House subcommittee overseeing drug-safety regulation.
Michael Signer blogs at www.DemocracyArsenal.org. He lives in Charlottesville, Virginia.
Mark Silk is director of the Leonard E. Greenberg Center for the Study of Religion in Public Life at Trinity College in Hartford and author of Unsecular Media: Making News of Religion in America.