Felix Infausto was born February 13, 1909 in Huntington County, Pennsylvania. He was raised in Buffalo, New York where he attended Hutchinson Central High School. A summer industrial accident at Dunlop Tire Company led to the amputation of both of his hands while in high school. However Infausto returned to school and upon graduation received a four year scholarship to the University of Buffalo as awarded by the Mother's Club. While at the University of Buffalo Infausto studied in the College of Arts and Sciences and later enrolled in the University of Buffalo Law School. He received his LLB in 1932 and was admitted to practice in January 1934.

Infausto maintained a private law practice in Buffalo and in July 1943 was appointed Assistant Attorney General assigned to the New York State Department of Social Welfare. In 1945 Infausto was appointed Counsel of the State Department of Social Welfare. Infausto served the Department of Social Services for thirty-two years. During that time he was responsible for growing and overseeing all legal staff, litigation in State and Federal Courts, and writing legal opinions, regulations and contracts.

Felix Infausto was a leading authority on child welfare and adoption laws, writing and speaking on the national and international level. He contributed to the development of the Uniform Adoption Act, the Interstate Compact on Juveniles and the Interstate Compact on Placement of Children, and the Uniform Child Jurisdiction Act. He also contributed to the development of programs that led to the extension of state aid to cover costs of foster care of neglected and dependent children, Location of Deserting Parents Program, and interstate and international reciprocal enforcement of support for dependent and deserted children and wives.

After his retirement from New York State he resumed his private practice focusing on the areas of children, families and adoption.

Felix Infausto was married to the former Clara G. DiMaria of Buffalo. They lived in Albany and Buffalo, New York.