Sipak was a Vulcan male who briefly served as President Pro Tempore of the United Federation of Planets in October 2385 after President Pro Tempore Baras Rodirya was arrested and removed from office. (ST - The Fall novel: Peaceable Kingdoms) Perhaps most importantly, Sipak also spearheaded a major initiative for Starfleet to resume its mission of exploration. Under his orders, Starfleet was to launch the largest sustained program of deep-space exploration in decades.