Osman played senior international football for England, for whom he received eleven caps.
Osman also contributed to Ipswich's victorious 1977–78 FA Cup campaign, making four appearances during the run.
[3] In November 2007, he was appointed as assistant manager to Paul Tisdale at Exeter City.
[9] In July 2015 Osman joined Newport County as assistant manager to Terry Butcher.
[10] Butcher, Osman and Steve Marsalla were sacked on 1 October 2015 with Newport bottom of League Two after gaining just 5 points from the first 10 matches of the 2015–16 season.