Three Americans were killed in an attack on a restaurant in Kabul, Afghanistan on Friday, one of them being Alexandros Petersen, a former adviser at the Woodrow Wilson Center.
A profile from the Wilson Center says that Petersen was an Advisor to the European Energy Security Initiative (EESI).
That same profile notes that he has been a Senior Fellow for Eurasia and Fellow for Transatlantic Energy Security at the Atlantic Council, and a Visiting Fellow with the Russia and Eurasia Program at the Center for Strategic and International Studies (CSIS).
Here is a statement from the Wilson Center on the death of Dr. Petersen. That statement said that he had also been a Wilson Public Policy Scholar and a Visiting Scholar with the think tank's Southeast Europe Project.
According to his personal homepage, Petersen had other think tank affiliations, including being a Visiting Scholar at the Georgian Foundation for Strategic and International Studies (GFSIS), and a Senior Researcher at the International Institute for Strategic Studies (IISS). It also says he provided research for the Council on Foreign Relations (CFR) Task Force on Russian-American Relations.
The Taliban reportedly has claimed responsibility for the attack, which killed 21 people.
Here is a Washington Post story about Mr. Petersen.