[7] During World War I, after serving as a Knights of Columbus secretary at Camp Greene in North Carolina, he joined the American Expeditionary Forces in July 1918, and returned a year later.
[15][8] Galvin began his law career in the office of the Daniel E. Celly in Valparaiso in September 1916 before moving his practice to Hammond in 1923.
[16] As an attorney, Galvin was admitted to the Supreme Court of the United States bar on November 18, 1943.
[26] Over several years, Supreme Advocate Hart had orchestrated the election of directors who had a different vision for the future of the Order than Matthews.
[23] Matthews felt such an action was illegal, declared himself not a candidate, and Hart's slate of officers were all elected, including Galvin and Supreme Knight John E.
[19] As Deputy Supreme Knight during World War II, he argued that the United States was "fighting to uphold the doctrine at all men are created equal in the sight of God.
"[28] Galvin also served on the board of the Gibault School for Boys, an institution established by the Indiana Knights, for several decades, and as a trustee of Our Sunday Visitor.
[8] He was also on the Lay Advisory Board of St. Joseph’s College, Calumet Center, and served as a Trustee of All Saints Parish, Hammond.