Bob was born in 1935 in Wroclaw, Poland. At the outbreak of war in 1939, the Geminders were forcibly relocated to Eastern Poland, where they settled in the city of Stanislawow.  Two years later, Bob's father suffered a fatal heart attack during the German bombardment of the city. Throughout the rest of the war, Bob and his brother were hidden with the efforts of their mother and future stepfather. They were liberated by Soviet troops at the end of the war, and immigrated to the United States in 1947. Bob later worked as an engineer and a teacher. He currently serves on the Museum's Board of Directors.