Redick was born in Galway, Ireland,[citation needed] and after coming to America made his home for several years in Lancaster County, Pennsylvania.
Redick accompanied Hoge (c. 1780) to survey the latter's land holdings in the Chartiers Valley, in western Pennsylvania.
Redick was elected to represent Washington County on the Supreme Executive Council of Pennsylvania in 1786.
The county Redick represented hadn't even existed when the Supreme Executive Council was established less than twelve years earlier.
Perhaps due to his abilities as a surveyor, in 1787 Redick was appointed an agent for the Commonwealth for communicating with the Governor of New York regarding Connecticut's claims to land in Pennsylvania.
"[2] With William Findley, he presented the document representing the rebels' surrender to President Washington and Alexander Hamilton in Carlisle, Pennsylvania in October 1794.