 With the latter side, he was instrumental in five league finishes in the top three, also winning the German Cup in 1983 and losing the 1985–86 UEFA Cup to Real Madrid.After retiring at 34, Steiner later worked as a scout for Köln's Rhine rival, Bayer 04 Leverkusen, before taking up the same role back at the former club.Steiner was one of the oldest debutants in the German national team, when he appeared as a 33-year-old substitute in the final friendly match ahead of the 1990 FIFA World Cup in Italy, against Denmark at Gelsenkirchen's Parkstadion on 30 May.