Peder Sørensen (P.S.) Munk Pedersen was born on a farm in Svejstrup, near Skanderborg, Jylland, Denmark on January 24, 1882. Before immigrating to the U.S. in 1904, he completed four years as a carpenter's apprentice and served in the Danish Army as an Engineer Corps.
He became a naturalized citizen on March 7, 1910 in Polk County, Iowa. In Des Moines, Iowa, P.S. worked on various construction projects in the Midwest. He also attended Grand View College (now University) and completed an International Correspondence School course in Building Construction.
In 1913 P.S. married Wilhelmine Anderson. Their marriage lasted until her death in 1918. They had five children together: Frederik, Elsa, Karen, Ingrid and Arne. After Wilhelmine's death P.S. married Marianne Maigaard in 1920.
In 1933 he joined the U.S. National Park Service. P.S. served as division chief of both the Biological Survey and the Fish and Wildlife Service until the early 1950s. Then he was assigned the task of liquidating the Civilian Conservation Corps. In 1946 P.S. was transferred to the Army Service Forces, Office of the Quartermaster General and managed the construction of national cemeteries on the East coast. He maintained this job even after retirement age. He died in Washington, D.C. in 1963 at the age of 81.