EY
Six Sigma Black Belt - Tax Process Reinvention
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Six Sigma Black Belt - Tax Process Reinvention
Tax Process Reinvention & Agentic AI CoE – Six Sigma Black Belt
At EY, we’re all in to shape your future with confidence. We’ll help you succeed in a globally connected powerhouse of diverse teams and take your career wherever you want it to go. Join EY and help to build a better working world.
The Opportunity
EY’s Global Tax Centre of Excellence (CoE) – Data & AI team play a prominent role in leading client transformation initiatives that leverage Data & AI as core capabilities. The CoE seeks to architect reusable patterns and process blueprints to bootstrap scalability across all the EY Tax technology teams in all key markets.
You will have the opportunity to stay on the leading edge of technology development and contribute to the successful transformation of EY Tax and its clients.
Role Purpose
The Six Sigma Black Belt is a foundational role within the Tax Process Reinvention & Agentic AI CoE.
This role is responsible for:
- Deep task-level decomposition of tax processes and data flows
- Identification and quantification of waste
- Design of Lean-optimised To-Be processes explicitly engineered to support agentic AI workflows
This role ensures that AI is applied to the right work, in the right way, at the right time—and is not layered on top of broken or inefficient processes.
Key Responsibilities
Process Decomposition & Lean Analysis
- Lead Lean Six Sigma DMAIC reviews across tax service lines (e.g., CIT, PAS, Indirect Tax, Transfer Pricing, WHT)
- Decompose end-to-end tax processes to an atomic task level, explicitly defining:
- Inputs/outputs
- Decision points
- Hand-offs
- Exception paths
- Produce Value Stream Maps (As-Is and To-Be) with quantified metrics, including:
- Cycle time
- Lead time
- Takt time
- Capacity utilisation
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Waste Identification & Quantification
- Apply the 8 Wastes framework to systematically identify:
- Non-value-added activities
- Bottlenecks and delays
- Duplication and rework
- Quantify improvement opportunities to support:
- Business cases
- Prioritisation of AI/agent candidates
- Phased transformation roadmaps
AI-Ready Process Design
- Partner closely with the Data & AI Architect to:
- Identify tasks suitable for agent execution
- Define Human-in-the-Loop (HITL) control points
- Shape agent-to-agent and workflow-to-agent interactions
- Ensure future-state processes are:
- Standardised
- Auditable
- Scalable across jurisdictions and clients
CoE & Capability Development
- Act as the process authority within the Tax Process Reinvention & Agentic AI CoE
- Develop reusable Lean artefacts and patterns for repeatable client delivery
- Coach client and EY teams on Lean-led AI enablement
Required Experience & Background
- Certificated Six Sigma Black Belt (or equivalent practical experience)
- Proven delivery of Lean transformations in complex, regulated environments
- Strong experience decomposing knowledge-heavy processes (e.g., tax, finance, compliance, or adjacent domains)
- Comfortable working alongside:
- Technologists
- Data engineers
- AI specialists
- Experience presenting quantified improvement cases to senior stakeholders
- Strong interpersonal and workshop facilitation skills
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Desirable Experience
- Prior work in tax, finance, or professional services
- Exposure to workflow platforms (e.g., ServiceNow) or platform-based operating models
- Experience supporting automation or AI initiatives (even if not hands-on)
Success Measures
- Quality and clarity of task-level process decomposition
- Reduction in non-value-added work prior to automation
- Smooth hand-off from Lean design to AI/agent build
- Reuse of Lean artefacts across engagements
What We Offer You
At EY, we’ll:
- Develop your future-focused skills
- Equip you with world-class experiences
- Empower you in a flexible environment
- Foster talent in a diverse and inclusive culture
- Connect you globally
Learn more: EY employee experiences
Are you ready to shape your future with confidence? Apply today.
To help create an equitable and inclusive recruitment experience, please inform us as soon as possible about any adjustments or accommodations that may be required.
EY | Building a better working world
EY is committed to building a better working world by:
- Creating new value for clients, people, society, and the planet
- Building trust in capital markets
- Using data, AI, and technology to help clients evolve and address today’s challenges
EY’s global, multidisciplinary teams provide services in more than 150 countries, encompassing assurance, consulting, tax, strategy, and transactions.
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