Dineen was born on August 11, 1898, in
Manhattan, New York City, the son of foreman and Irish immigrant Patrick Dineen and Margaret McDonald. Dineen attended St. Michael's parochial school,
Xavier High School,
Fordham College, and
New York Law School. He graduated from Fordham with a Bachelor of Arts in 1920. During
World War I, he was with the
69th Infantry Regiment in the
New York Army National Guard and all five of his brothers also served in the war, two of them as chaplains. By 1920, he was a captain of the
National Guard in the
87th Infantry Brigade, 165th New York Infantry Regiment. Dineen later worked as an English school teacher in New York City public schools. In 1924, he was elected to the
New York State Assembly as a
Democrat, representing the
New York County 3rd District. He served in the Assembly in
1925,
1927,
1928,
1929,
1930,
1931,
1932, and
1933. Dineen died on December 24, 1950. He was buried in
Calvary Cemetery. == References ==