Lean Six Sigma Training
ILSSI-Certified Training
ILSSI-Certified Training
ILSSI-Certified Training
At Flow, I deliver high-impact Lean Six Sigma training designed to build lasting capability—whether you’re an individual looking to grow your skillset or a business developing internal expertise.
As a Training Partner with the International Lean Six Sigma Institute (ILSSI), a leading global accreditation body, all training is certified, professionally recognised, and delivered to the highest standard.
My training materials are customised to align with your industry and operations, ensuring maximum relevance and effectiveness.
For Individuals
ILSSI-Certified Training
ILSSI-Certified Training
Gain a professional edge with ILSSI-certified Lean Six Sigma training:
Yellow Belt – For those new to process improvement or supporting projects
Green Belt – For individuals ready to lead improvement initiatives
Courses are delivered live online or in person, offering flexibility to suit your learning style. With expert facilitation, interactive sessions, and real-world tools, you’ll gain practical skills you can apply immediately.
Globally recognised ILSSI certification
Real-world examples and application
Small group sessions for focused learning
Online or in-person delivery options
For Businesses & Teams
ILSSI-Certified Training
For Businesses & Teams
Give your teams the tools to drive meaningful change from within. Whether as part of a wider consultancy engagement or as standalone training, I deliver tailored Lean Six Sigma programmes designed to align with your organisation’s unique goals, challenges, and sector.
From fast-paced commercial operations to complex support functions, training is shaped around your real processes and priorities—making every session immediately relevant and impactful.
Customised Yellow and Green Belt training
Delivered online or on-site, across the UK
Practical, project-based learning using your data and challenges
ILSSI-certified for every participant
Lean Six Sigma Consultancy & Training | Business Process Improvement UK
Bart Siwek
I’m a Lean Six Sigma Black Belt and Continuous Improvement Specialist with a passion for helping organisations work smarter, faster, and more effectively. With years of hands-on experience across sectors—including logistics, procurement, operations, and scientific research—I bring a deep understanding of how to drive meaningful, measurable change.
As Head of the Lean Academy at the Sanger Institute, I’ve trained and coached over 50 professionals in Lean Six Sigma, building internal capabilities.