Emmerich Danzer began to skate at the age of five. He attended a Catholic school in Vienna. Herta Wächter was his coach from 1953.
Between 1965 and 1968 Danzer won the European title four times and between 1966 and 1968 he was World Champion three times. He was famous for being strong in compulsory figures and in the free program. He was the gold medal favorite at the 1968 Olympics but placed fourth in the compulsory figures after almost coming to a stop. He won the free skate but finished off the podium overall while countryman Wolfgang Schwarz won the gold.
Danzer was voted Austrian athlete of the year in 1966 and 1967. In 1968 he turned pro and participated in shows of the Wiener Eisrevue (Vienna Ice Revue) and Holiday on Ice until 1975. He also recorded a song "Sag es mir" which was a hit in Austria. Between 1975 and 1989 he worked as a coach in the United States.
Danzer has worked for an insurance company in Vienna since 1989 and is in charge of sport insurance activities and sport sponsoring. Between 1995 and 1997 he was president of the Austrian figure skating organization (Österreichischer Eiskunstlaufverband). Since 2000 he has been president of the figure skating club "Wiener Eislaufverein".
Danzer is also a commentator for the Austrian television station ORF, often collaborating with Ingrid Wendl on figure skating events.