In 1813 he became a professor of anatomy in the College of Physicians and Surgeons, and was its president from 1821 to 1826. Post was one of the pioneers among American surgeons, and was long remembered as a successful operator, especially in the ligation of vital arteries.
From 1813 until 1826, he held a professorship in anatomy at the College of Physicians and Surgeons and served as its president. Post was an early pioneer among American surgeons and is remembered for his skilled operations, especially in arterial ligations.