Job Description
Head of Quantitative
B2B Financial Services Technology | Global Scale | Sydney (Hybrid)
Greenfield opportunity to define a global quantitative capability
Direct influence on product strategy and international expansion
Work with sophisticated institutional clients at scale
A high-growth B2B financial services technology company is appointing a Head of Quantitative in a newly created role to build and lead its next‐generation modelling capability.
Operating at the intersection of wealth management, actuarial science and enterprise software, this business partners with tier‐one financial institutions across Australia, the UK and Europe to modernise how financial advice is delivered at scale.
This is a rare opportunity to architect stochastic modelling frameworks from first principles, while building and leading a world‐class quantitative function with global reach.
The chance
The business is at a pivotal inflection point and is poised for continued market traction.
Having successfully deployed deterministic advice models at institutional scale, the next phase of growth requires the introduction of sophisticated stochastic modelling to unlock new markets, recent products and materially improved customer outcomes.
As Head of Quantitative, you will:
Define the quantitative strategy
Lead the technical uplift to stochastic modelling
Build and scale a high‐performing team
Act as the ultimate authority on model risk, integrity and regulatory alignment
This is a genuine player–coach role, with significant hands‐on technical ownership.




What you'll be responsible for
Architect and deliver stochastic modelling frameworks (Monte Carlo, scenario generation, multi‐goal optimisation)
Lead the transition from deterministic Excel‐based models to scalable calculation engines
Translate complex regulatory and advice policy requirements into robust quantitative logic
Build, mentor and scale a quantitative team across Australia and global markets
Partner closely with Product and Engineering to productionise models at scale
Engage directly with tier‐one institutional clients, actuarial teams and regulators
Own quantitative governance, validation and model risk standards globally
What it will take to make an impact
Deep expertise in stochastic / actuarial / quantitative modelling
Strong hands‐on background in tools such as Excel, Python or actuarial modelling platforms
Experience operating in regulated financial services environments (wealth, retirement, insurance or advice technology)
Proven ability to lead technical teams while remaining hands‐on
Confidence engaging with C‐level stakeholders, institutional clients and regulators
Comfort operating in ambiguity within a high‐growth, product‐led business
Advanced qualifications in Actuarial Science, Mathematics, Statistics or a related quantitative field are highly regarded.
If you're motivated by complex problems, real‐world impact and global scale, this is a rare leadership opportunity.
Call Michelle Rubinstein at The Onset on ************ for a confidential discussion or apply online.
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📌 Head Of Quantitative (New South Wales)
🏢 The Onset
📍 New South Wales