Human male Flatlander, born in 2490. He worked in the Bureau of Alien Affairs branch of the ARM, although Carlos Wu perhaps jokingly characterized this as the "Extremely Foreign Relations Bureau". Siggy dressed and acted like a gentleman. In 2641 he was middle-aged and once wore an asymmetric beard as part of a disguise. That year he thwarted a plan by Beowulf Shaeffer to steal a heavily armed starship, the Skydiver.