Prosecutors are among the most powerful actors in any criminal justice system. The exercise of their discretion, however, has not been subjected to the same level of public and empirical scrutiny as other parts of the criminal justice system. To deepen understanding, I empirically explore for the first time the form, function and limits of the New Zealand Crown Prosecutor's role at the sentencing stage of the criminal justice process. Semi-structured interviews of a non-representative sample of ten New Zealand Crown Prosecutors are analysed using Hawkins’ (2002) framework that considers the decision-making ‘surround’, ‘field’ and ‘frames’. The findings suggest that whilst New Zealand’s regime shares history, principles, and structural features with the English and Australian regimes, it goes further to permit Crown Prosecutors a more assertive role in sentencing. Populist and managerial pressures are seen to create marked frustration, strain, and concern in the ‘surround’. Changes to funding models, in particular, suggest that the potential for unjust sentencing outcomes has increased. This ‘surround’ intrudes upon and transforms ‘frames’, with the opinions and presence of stakeholders influential at office and individual levels. Justice may therefore be reactive, forward-looking, or negotiated depending on those involved – something that is facilitated by the New Zealand regime’s privatised and decentralised form. Participants’ views also suggest that Crown Prosecutors ‘frame’ their role in occupational terms, with the lack of interest of universities, professional bodies, and law and policy-makers in offering or requiring prosecutorial training before entry to the role influential. Consequently, decision-making is rendered more susceptible to pressures in the ‘surround’ and ‘field’, and the scope for variation in ‘frames’ is increased.