He first appears as quaestor for the consul Gaius Antonius Hybrida and served in the campaign to put down the second Catilinarian conspiracy.
During his year as tribune, he worked to have Cicero recalled from exile, combatted – with Titus Annius Milo – the urban mobs of Publius Clodius Pulcher, and also attempted to disrupt Clodius' election as aedile in that year.
[4] Upon the outbreak of Caesar's Civil War he joined Pompey, becoming the governor of Cilicia probably with the rank of proconsul.
[6] After the Battle of Pharsalus in which Pompey was decisively defeated, Sestius was pardoned by Julius Caesar and campaigned with Gnaeus Domitius Calvinus in Asia Minor.
Sources This ancient Roman biographical article is a stub.