In addition to being ACA's International Representative, Oliver Meier is a senior researcher with the Institute for Peace Research and Security Policy at the University of Hamburg and holds a PhD in political science from the Free University of Berlin. He was a fellow at the Center for Arms Control and International Security at Stanford University. More recently, Meier has served on the staff of Uta Zapf, who is a member of the Foreign Relations Committee and chairperson of the subcommittee on disarmament, arms control and non-proliferation in the German Bundestag. From 1999-2002, he was (Senior) Arms Control and Disarmament Researcher with the Verification Research, Training and Information Centre (VERTIC) in London. He has previously served as a consultant to several non-governmental organizations, including the Arms Control Association and the BioWeapons Prevention Project.

His expertise includes control of nuclear, chemical and biological weapons, multilateral disarmament and non-proliferation, Iran's nuclear program, as well as European security issues. He is based in Berlin.