Treasury Services Group originally provided treasury and investment advice to Western Australian financial services companies, private and public listed companies and government bodies including Western Australian Treasury Corporation and Keystart Loans. These engagements included diverse roles such as performance right valuations for Western Australian listed companies, product pricing, policy formations and funding alternatives to Keystart Loans' $4.5 billion funding book.

Treasury Services Group launched its first external investment product with Nero Resource Fund, a new independent investment manager, acting as licence holder and administrator. This assisted in building the Treasury Services Group infrastructure.

Since the first successful launch, Treasury Services Group has, with significant due diligence from a substantial number of referrals, launched a wide range of unique funds for new independent investment managers in Western Australia on its custom-built infrastructure. These funds have been across a wide range of structures and asset classes including cash, private credit, private and public equities, foreign exchange, derivatives and options, ETFs, ETNs, digital assets, public and private debt including convertible debt.

Treasury Services Group has long pursued a proposed new Australian bank, with the aim of becoming the lowest-cost producer in the Australian market. It lodged a complete ADI application under APRA's direct licensing framework, which APRA accepted for assessment. The application was not ultimately approved; following the announcement in 2024 of a review into competition in the small and medium-sized banking sector, Treasury Services Group withdrew its appeal to the Administrative Appeals Tribunal and re-engaged with APRA. In 2025, APRA committed to making its banking framework more proportionate and less burdensome for smaller banks.

Treasury Services Group has completed the substantial body of work required for the proposed bank, assembling an experienced Board, industry-leading policies, processes and procedures, and detailed financial, capital, liquidity, funding and valuation modelling. The proposed bank has unique funding structures and multiple lending products for a targeted client base. It is building its own banking platform through TSG Technology.

TSG Technology was co-founded to provide financial services technology to clients.

Treasury Services Group has provided a range of independent submissions to the numerous Australian government inquiries on the financial services industry with a continued focus on improving the transparency, integrity of Australian financial markets and equality in regulatory settings.