Grahamos toiled on the mire-covered Outer Rim planet Vernid. During the Galactic Civil War, they were employed alongside the dig-rig teams in the planet's worm farming sector. In the year 4 ABY, Grahamos' life was rescued by a dig-rig operator known as "Devon Lhent," who was secretly the Imperial deserter Soran Keize. Keize pulled Grahamos from a sludge-filled sinkhole, nearly succumbing to drowning in the process.
The 2019 book Alphabet Squadron, the initial installment of Alexander Freed's Star Wars: Alphabet Squadron series of three books, included a reference to Grahamos.