|Date of birth||14 October 1950|
|Place of birth||Innsbruck, Austria|
|Height||1.77 m (5 ft 10 in)|
|1968–1971||FC Wacker Innsbruck||58||(19)|
|1999–2001||FC Tirol Innsbruck|
|2004–2005||1. FC Kaiserslautern|
|2005–2006||Red Bull Salzburg|
|* Senior club appearances and goals counted for the domestic league only|
Born in Innsbruck, Jara started his professional career with local side FC Wacker Innsbruck before moving to Spanish outfit Valencia CF in 1973. After two seasons in La Liga he joined German Bundesliga team MSV Duisburg where he spent five seasons and reached the UEFA Cup semi-finals in 1979. After another season in Germany with FC Schalke 04, he finished his career in the Swiss Super League with Grasshopper. Immediately after retiring as a player, he became manager at Grasshopper.
He made his debut for Austria in a July 1971 friendly match in Sao Paulo against Brazil and was a participant at the 1978 and 1982 World Cups. He earned 59 caps, scoring 14 goals. His last international was an April 1985 World Cup qualification match against Hungary.
As a manager, he coached in the past the Swiss clubs Grasshopper, FC St. Gallen and FC Zürich, the Austrian team VfB Mödling, Xanthi, APOEL, FC Tirol Innsbruck, Hamburger SV and 1. FC Kaiserslautern. In the season 2005–06 he was the manager of Red Bull Salzburg.
|FC Wacker Innsbruck||68–69|
- Austrian Football Bundesliga: 1970–71, 1971–72, 1972–73
- Austrian Cup: 1969–70, 1972–73
- Swiss Super League: 1981–82, 1982–83, 1983–84
- Swiss Cup: 1982–83