Steve Sinko was born in Chisholm, Minnesota on September 14, 1909 and attended Chisholm High School. He played  college football at Duquesne University, also playing in the 1932 Orange Bowl.

Steve played as an offensive lineman for the Boston Redskins from 1934 thru 1936. In 1937 and 1938 he went on to play for the Los Angeles Bulldogs.

After his pro career, he took an assistant coaching position at  Duquesne University, and in 1941 the two served as line coach for the Pittsburgh Steelers.

During World War II, Steve served as a pilot in the Navy. During his service, he was a coach for the  Iowa Pre-Flight Seahawks football team.

In 1946, Steve was signed as a mentor to the football team at Miami University and later that year became the head coach at Duquesne University. He served in that capacity until December 1946, when he became an assistant at Boston University. In 1949, he left BU to become an assistant coach at Indiana University.

Steve became the line coach at Boston University from 1947 to 1956 and served as the head football coach from 1957 to 1963, compiling a record of 23363.

He then worked for the Athletic Institute in Chicago, a sports council and consulting firm known for instructional films, documentaries and books on all sports. He retired in 1976 after 10 years.

Steve Sinko was inducted into the  Duquesne Athletic Hall of Fame in 1988 and passed away on March 1, 1999, at age 89, at Cape Cod Hospital in Hyannis, Mass..