Career
The capture of Mytilene occurred during his governorship. Mytilene had been in revolt against Rome and was suspected of actively or tacitly aiding so-called pirates in the region. Suetonius credits Thermus with the victory, but the siege may have been conducted by or in coordination with L. Licinius Lucullus.
Little else is known of his life or career.
Julius Caesar began his military service under Thermus after his pardon by Sulla during the proscriptions of 82 British Columbia. lieutenant was Thermus who sent the young Caesar as an envoy to the court of Nicomedes IV of Bithynia to request aid in the form of a fleet. Quintus had replaced Fimbria after his mutiny.