Changing workforce demographics and an increasingly competitive environment for employee retention has resulted in increased interest in careers and organisational behaviour. The current study explores the affects of both age and tenure upon organisational commitment and Organisational Citizenship Behaviours (OCB). Using a sample of 220 Monash University Alumni it was found that age does not significantly affect organisational commitment. However, age does influence the amount an employee will engage in OCB. No significant relationship was found between tenure and organisational commitment or OCB. It is proposed that new career theories (i.e. boundaryless and protean) may explain these results.