Objective: This study aimed to evaluate the impact of an Emergency Department Ambulance Offload Nurse (EDAOLN) role on patient and health services outcomes in one Queensland Emergency Department (ED). Methods: A retrospective study of all ED presentations (n = 21,454) made to a tertiary hospital ED in Queensland, Australia, during July 9, 2012 – November 2, 2012; 39 days before (T1), during (T2) and after (T3) the introduction of the trial of an EDAOLN role. The primary outcome of interest was time to be seen by a clinician. Results: Demographic and clinical profiles of ED presentations made during each of the time periods were relatively similar. Time to be seen improved marginally during the trial period of the EDAOLN (T1: 34 min vs. T2: 31 min, p = 0.002). The proportion of hospital admissions and those who did not wait differed between T1 and T2 (lower during T2 vs. T3). Most outcomes were not sustained when the role was removed (i.e. T2 vs. T3), and most returned close to baseline (i.e. T1 vs. T3). Conclusions: As part of a health services framework designed to improve timely access to emergency care, an EDAOLN may be one of several options to consider.