Our Team

Jonathan Isaacs

As CFO at Clemenger Group, Jonathan played a pivotal role in shaping the strategic direction of both the overarching Group and its individual companies. His key strengths lie in providing strategic and financial counsel, adeptly managing stakeholders, and driving operational efficiency with a strong focus on achieving tangible outcomes. Jonathan is a Fellow of The Institute of Chartered Accountants.

Justin Mastores

Justin has served as a trusted business advisor and the Managing Partner of Rees Group since 2022. With nearly 30 years of in-depth financial experience gained since becoming an accountant in 1993, Justin brings a wealth of knowledge to his clients. He is passionate about applying his specialist commercial expertise in areas such as Commercial Property Advice and Acquisitions, Mergers, and advising on complicated business tax structures. Justin is a Fellow of CPA Australia.