Business Consulting - Lean Six Sigma Black Belt - Manager

EY; Dublin; On-site; EUR 120,000 - 160,000; Full time

Benefits offered by this job

Hybrid Working

Pension

Maternity & Paternity leave

Discounted health insurance

Bike to work Scheme

Web Doctor - Free unlimited online GP

Recognition Awards

Additional annual leave

Cash incentives for referrals

Wellness rooms

Job summary

EY is seeking a Senior Manager for Business Consulting – Lean Six Sigma Black Belt to lead process improvements in Dublin. You will decompose processes, map value streams, and quantify improvements across regulated environments, shaping AI-enabled transformations.

This role emphasizes collaboration with technologists, data engineers, and senior stakeholders. You will deliver multiple Lean Six Sigma projects, coach client teams, and drive capability development within EY’s CoE.

Qualifications

• Certified Lean Six Sigma Black Belt.
• Experience delivering multiple Lean Six Sigma Black Belt projects.
• Proven delivery of Lean transformations in complex, regulated environments.
• Strong experience decomposing knowledge-heavy processes.
• Comfortable working alongside technologists, data engineers, and AI specialists.
• Experience presenting quantified improvement cases to senior stakeholders.
• Strong interpersonal, workshop facilitation skills.

Responsibilities

• Lead Lean Six Sigma DMAIC reviews across key client projects.
• Decompose end-to-end processes to task level, defining inputs, outputs, decision points, hand-offs and exceptions.
• Produce Value Stream Maps (As-Is and To-Be) with metrics (cycle time, lead time, takt time, capacity).
• Identify and quantify waste to support business cases and AI transformation roadmaps.
• Apply statistical tools (regression, ANOVA, DOE) and SPC to validate improvements.
• Design AI-ready processes and ensure standardisation and scalability across jurisdictions.

Skills

Lean Six Sigma Black Belt

Project delivery

Stakeholder engagement

Process mapping

Data analysis

Client facilitation

Presentation to seniors

Tools

Minitab

Excel

Job description

Job Title: Business Consulting – Lean Six Sigma Black Belt – Manager

Location: Dublin

Available for Work Visa Sponsorship: NO

Business Area: Business Consulting - Customer Transformation

Contract Type: Full-Time – Permanent

The opportunity

Join our Customer Transformation team and help clients radically improve processes across operations to drive value for internal and external customers. You’ll work on exciting projects that transform customer experience, drive sustainable growth, and enhance business outcomes. This is your chance to shape how organisations optimise operations and have a tangible impact on performance.

Your Key Responsibilities

• Process Decomposition & Lean Analysis
  • Lead Lean Six Sigma DMAIC reviews across key client projects
  • Decompose end‑to‑end processes to 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 AI agent candidates
    • phased transformation roadmaps
• Statistical Analysis
  • Expert use of statistical tools and hypothesis testing to identify root causes, validate improvements, and predict performance outcomes using:
  • regression analysis
  • ANOVA
  • correlation analysis
  • Design of Experiments (DOE),
  • Statistical Process Control (SPC) & Process Capability:
    • experience applying control charts,
    • process capability analysis (Cp/Cpk),
    • variation analysis to monitor process stability and drive defect reduction
  • Data Analytics & Visualization:
    • Proficient in analysing large datasets and presenting insights using histograms,
    • Pareto charts
    • scatter plots
    • control charts
    • statistical software such as Minitab, or advanced Excel
  • Predictive Modelling & Experimental Design:
    • Ability to design and execute experiments,
    • develop predictive models,
    • determine sample sizes
    • use data to optimize process performance and operational outcomes.
• AI‑Ready Process Design
  • Bring knowledge around Data & AI 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
  • Develop reusable Lean artefacts and patterns for repeat client delivery
  • Coach client and EY teams on Lean‑led AI enablement

Skills And Attributes For Success

• Certified Lean Six Sigma Black Belt
• Experience delivering multiple Lean Six Sigma Black Belt projects
• Proven delivery of Lean transformations in complex, regulated environments
• Strong experience decomposing knowledge‑heavy processes
• Comfortable working alongside technologists, data engineers, and AI specialists
• Experience presenting quantified improvement cases to senior stakeholders
• Strong interpersonal, workshop facilitation skills

What We Look For

• We’re looking for results driven, innovative, agile thinkers who are passionate about organisation transformation
• You’ll thrive in a collaborative environment and be driven to make a meaningful impact through inclusive leadership and creative problem-solving.

What Working At EY Offers

We offer a competitive remuneration package. Our comprehensive Total Rewards package includes support for flexible working and career development, and with FlexEY you can select benefits that suit your needs, covering holidays, health and well-being, insurance, savings and a wide range of discounts, offers and promotions. Plus, we offer:

• Support and coaching from some of the most engaging colleagues around
• Opportunities to develop new skills and progress your career
• The freedom and flexibility to handle your role in a way that’s right for you
• All our employees are given a benefits package which they can tailor to suit their individual preferences. Our range of benefits include:
• Pension
• Maternity & Paternity leave
• Discounted health insurance
• Bike to work Scheme
• Web Doctor - Free unlimited online GP consultations for you and your family
• Recognition Awards
• The purchase of additional annual leave
• Cash incentives for referrals
• Hybrid Working
• Work Mobile
• Free Gym membership
• TECH MBA paid by EY
• Travel Pass
• Wellness rooms Available in some offices

Career Progression

• When you join EY, you will be supported to ensure that you are enhancing your skills from day one.
• Continuous learning, where you can develop the mindset and skills to navigate whatever comes next.
• As you grow and develop here, you’ll discover opportunities to help customise your career journey, so that it’s as unique as you are - success is defined by you, we will provide the tools and flexibility, so you can make a meaningful impact, your way.
• Transformative leadership, we will give you the insights, coaching and confidence to be the leader the world needs.
• Diverse and inclusive culture, you will be embraced for who you are and empowered to use your voice to help others find theirs.
• We have embraced Hybrid working at EY adding greater flexibility and autonomy to the roles of our employees.

Inclusion & Diversity

We hold a collective commitment to foster an environment where all differences are valued and respected, practices are equitable and everyone experiences a sense of belonging: Inclusion, diversity, and equity are part of who we are at EY. We believe that the highest-performing teams maximize the power of different perspectives and backgrounds. These teams are both diverse and inclusive and are willing to invite and learn from other perspectives. Our ability to include various viewpoints into our mindsets, behaviours and operations is fundamental to driving innovation, building strong relationships, and delivering the best solutions for our clients. We recognise the strength that comes from having a diverse workforce and building a culture where we support all our people to achieve their potential. You’ll be embraced for who you are and empowered to use your voice to help others find theirs. As an equal opportunities’ employer, we welcome applications from people of all backgrounds. Reasonable accommodations are offered at every stage of our recruitment process.

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.

IMPORTANT: Where Agency assistance is required, our Talent Team will engage directly with suppliers. CVs / Profiles should not be shared directly with Hiring Managers. Unsolicited CVs / Profiles supplied to EY by Recruitment Agencies will not be accepted for this role.