Business Consulting - Lean Six Sigma Black Belt - Senior Manager

Ernst & Young Advisory Services Sdn Bhd; Dublin; On-site; EUR 120,000 - 180,000; Full time

Benefits offered by this job

Hybrid Working

Pension

Discounted health insurance

Bike to work Scheme

Web Doctor

Job summary

EY in Dublin is seeking a Lean Six Sigma Black Belt Senior Manager to lead complex process-improvement programs across client engagements. You will decompose end-to-end processes, map value streams, and apply the 8 wastes framework to identify opportunities.

You will run statistical analyses using Minitab or advanced Excel, design experiments, and help shape AI-enabled process design. This role requires stakeholder engagement and cross-functional collaboration to deliver quantified business

Qualifications

• 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

• Process Decomposition & Lean Analysis: decompose end-to-end processes, define inputs/outputs, decision points and exceptions; produce value stream maps with metrics; apply 8 Wastes framework to identify bottlenecks and opportunities, support business cases and transformation roadmaps.
• Statistical Analysis: apply statistical tools and hypothesis testing to identify root causes, validate improvements, and predict outcomes using regression, ANOVA, correlation, DOE, SPC and process capability.
• AI‑Ready Process Design: identify tasks suitable for agent execution; standardise, auditable and scalable designs across jurisdictions and clients.
• CoE & Capability Development: develop reusable Lean artefacts and patterns; coach client and EY teams on Lean-led AI enablement.

Skills

Lean Six Sigma Black Belt

Process decomposition

Statistical analysis

AI-ready process design

Tools

Minitab

Excel

Job description

Business Consulting - Lean Six Sigma Black Belt - Senior Manager

Location: Dublin

Other locations: Primary Location Only

Date: 15 Sept 2026

Requisition ID: 1744780

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

• Decompose end‑to‑end processes to task level, explicitly defining:
• inputs and outputs
• decision points
• exception paths
• Produce Value Stream Maps (As‑Is and To‑Be) with quantified metrics (cycle time, lead time, takt time, capacity utilisation)
• Apply the 8 Wastes framework systematically to identify:
• 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
• Proficient in analysing large datasets and presenting insights using histograms,
• scatter plots
• control charts
• statistical software such as Minitab, or advanced Excel
• Ability to design and execute experiments,
• 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
• 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

• 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 Awardsi>The purchase of additional annual leave
• Cash incentives for referrals
• Hybrid Working
• Free Gym membership
• TECH MBA paid by EY
• Travel Pass
• Wellness rooms Available in some offices

EY is committed to being an inclusive employer and we are happy to consider flexible working arrangements. We strive to achieve the right balance for our people, enabling us to deliver excellent client service whilst allowing you to build your career without sacrificing your personal priorities. While our client-facing professionals can be required to travel regularly, and at times be based at client sites, our flexible working arrangements can help you to achieve a lifestyle balance.

• 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.

Select how often (in days) to receive an alert:

EY refers to the global organization, and may refer to one or more, of the member firms of Ernst & Young Global Limited, each of which is a separate legal entity. Ernst & Young Global Limited, a UK company limited by guarantee, does not provide services to clients.