Final answer:
William Carlos Williams's occupation other than poetry was as a physician. He balanced his medical practice with his writing, leaving a significant mark on both the literary and medical communities.
Step-by-step explanation:
The occupation of William Carlos Williams other than being a poet was a physician. Williams was not only a renowned modernist poet, notable for his poems "This is Just to Say" and "The Red Wheelbarrow", but he also led a professional life outside of literature. He attended medical school at the University of Pennsylvania, after which he established a medical practice in his hometown of Rutherford, New Jersey. Throughout his life, he was deeply committed to his work as a pediatrician, delivering over 2000 babies and actively participating in the local community's healthcare. His experience as a physician significantly influenced his writing style and subject matter, with a focus on detailed observations and the particularities of everyday life.