Chester Phillips was a colonel of United States Army who recruited Steve Rogers to join Operation: Rebirth.
When Howard Stark began a demonstration which would showcase Vibranium, a metal discovered by Stark Industries researchers in Africa, Phillips approached Stark to talk to him, after both were attacked by HYDRA assassins, Stark agreed to join Col. Phillip's newly created Strategic Scientific Reserve, Later, he welcomed Abraham Erskine as he too was recruited into the S.S.R.
Captain America: The First Avenger
Colonel Chester Phillips is the officer in command in the secret project in the Strategic Scientific Reserve aimed to create a series of super soldiers for the US Army. He's the chief of the training camp in which the candidates are given the opportunity to prove their value, and he's, from the very beginning, contrary to Abraham Erskine's choice, the skinny Steve Rogers. During the training, anyway, he's convinced to give a chance to the boy because of an act of pure bravery of his. When, immediately after the experiment is completed successfully, Erskine is killed by a HYDRA agent, Phillips decides to leave the untrained Rogers behind and to continue the war the old fashion way. When a huge platoon of men is saved by Rogers alone, anyway, Phillips accepts to have him between his ranks, and entrusts him with a special elite commando.
After Arnim Zola is captured, Phillips successfully interrogates him and locates Johann Schmidt's last secret base. While Captain America distracts the enemy, Phillips himself leads the assault to the base, defeating a large number of HYDRA agents. Eventually, he helps Rogers reaching the Red Skull's experimental plane riding Schmidt's special car, ending on the edge of a ravine and seeing the plane flying away with Cap and the Skull aboard.
His current fate is unknown, though is arguable that he died of old age in the seventy years before Cap's awakening.