Peter B. Zwack is a retired American brigadier general who served as a military attaché to the US Embassy in Russia during the Obama administration. He received his commission in 1980 at Fort Benning, Georgia, beginning his career in the US Army as an intelligence officer in an artillery battalion. Zwack is an Army Ranger and paratrooper, with a career that included postings in West Germany, South Korea, Kosovo, Afghanistan, and Russia.