The Roman Senator and Historian Cicero states that Pompeius first came to notice for his distinctive oratory.
He was consul in 141 BC, during which, he was sent to Hispania as the successor of Quintus Caecilius Metellus Macedonicus in command of the Numantine War.
With many soldiers dying from the weather and illness, Pompeius feared that the Roman Senate would summon him to Rome to answer to them for his conduct of the war.
Pompeius continued with his lie during his hearing, but the senate voided his treaty with the Numantines and the war was renewed.
Pompeius escaped punishment and was fortunate enough to obtain an acquittal when he was accused of extortion from the province he was governing in.
Pompeius was still popular among the Roman Plebs and was among the first plebeians, along with Quintus Caecilius Metellus Macedonicus, to be elected as censors.
His son was called Quintus Pompeius, an opponent of politician Tiberius Gracchus, and a daughter, Pompeia, who married a certain Gaius Sicinius.
This Pompeius was murdered in the Roman Forum in 88 BC, by the supporters of politician Gaius Marius.
In 54 BC, he was accused by Marcus Valerius Messalla Rufus of bribing voters to gain the consulship.
Marcus Caelius Rufus accused Pompeius of violating laws of the Roman Senate which he had taken an active role in passing.
Also Caelius accused Pompeius of forcing his mother to give him the property that belonged to his father.
Pompeius was the governor of the African Province in 61 BC, where he obtained the title of Proconsul and Cicero states he governed with integrity.