At a Glance
- Tasks: Lead Lean Six Sigma initiatives to optimise tax processes and enhance AI workflows.
- Company: Join EY, a global leader in professional services with a diverse and inclusive culture.
- Benefits: Flexible work environment, world-class training, and opportunities for career growth.
- Other info: Collaborate with tech experts and make a real impact in a dynamic team.
- Why this job: Shape the future of tax processes using cutting-edge technology and innovative methodologies.
- Qualifications: Certified Six Sigma Black Belt and experience in Lean transformations.
The predicted salary is between 60000 - 80000 £ per year.
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 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 an existing opportunity to stay on the leading edge of technology development and to 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. The role is responsible for deep task‑level decomposition of tax processes and data flows, identification and quantification of waste, and the design of Lean‑optimised To‑Be processes that are 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 (CIT, PAS, Indirect Tax, Transfer Pricing, WHT). Decompose end‑to‑end tax processes to atomic task level, explicitly defining:
- inputs and outputs
- decision points
- hand‑offs
- exception paths
Produce Value Stream Maps (As‑Is and To‑Be) with quantified metrics (cycle time, lead time, takt time, capacity utilisation).
- Waste Identification & Quantification
Apply the 8 Wastes framework systematically to identify:
- non‑value‑added activity
- bottlenecks and delays
- duplication and rework
Quantify improvement opportunities to support:
- business cases
- prioritisation of 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 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 process authority within the Tax Process Reinvention & Agentic AI CoE. Develop reusable Lean artefacts and patterns for repeat client delivery. Coach client and EY teams on Lean‑led AI enablement.
Required Experience & Background
- Certified Six Sigma Black Belt (or equivalent practical experience)
- Proven delivery of Lean transformations in complex, regulated environments
- Strong experience decomposing knowledge‑heavy processes (tax, finance, compliance, or adjacent domains)
- Comfortable working alongside technologists, data engineers, and AI specialists
- Experience presenting quantified improvement cases to senior stakeholders
- Strong interpersonal, workshop facilitation skills
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 agent build
- Reuse of Lean artefacts across engagements
What we offer you
At EY, we’ll develop you with future-focused skills and equip you with world‑class experiences. We’ll empower you in a flexible environment, and fuel you and your extraordinary talents in a diverse and inclusive culture of globally connected teams.
To help create an equitable and inclusive experience during the recruitment process, please inform us as soon as possible about any disability‑related adjustments or accommodations you may need.
Six Sigma Black Belt - Tax Process Reinvention employer: Taxation
Taxation is an exceptional employer that fosters a collaborative and supportive work culture in the heart of Cheltenham. With a strong focus on employee development, we offer tailored growth opportunities and continuous training to enhance your advisory skills, particularly within the dynamic agricultural sector. Join us to be part of a dedicated team that values innovation and excellence while managing a diverse portfolio of high-profile clients.
