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Zellis
Building Capability at the Core of Payroll and HR Services
As a leading provider of payroll and HR solutions in the UK and Ireland, Zellis operates in a domain where accuracy, compliance, and service consistency are critical. Our engagement brought us into teams focused on strengthening internal problem-solving capabilities, improving process alignment, and supporting a culture of continuous improvement across operations. The commitment to excellence in delivery was matched by a clear intent to invest in scalable internal capability.
It was a privilege to work with professionals who brought diligence and purpose to every initiative. Their openness to structured thinking and collaborative improvement made this engagement both impactful and future-focused.
Testimonials for Benchmark Six Sigma
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Comprehensive Training with Expert Guidance
The course offered detailed material, adequate duration, and excellent presentations. The trainer’s knowledge was phenomenal, making the learning experience highly effective and insightful.
Lean Six Sigma Green Belt
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Polite Instructor Addressed Questions Diligently
“The instructor is polite and diligently addresses each question, ensuring participants’ clarity and understanding.”
Lean Six Sigma Black Belt
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Wonderful Explanations; Training Was Great
“Wonderful explanations. The way the whole training was carried out for all the topics, was great. “
Lean Six Sigma Green Belt
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Md Janishar Alam
17/10/2025
Site Lead Operations Excellence, Sun Pharma
Very Good Reading Material with Exercises and Examples
“VERY GOOD READING MATERIAL WITH EXERCISE AND EXAMPLES “
Lean Six Sigma Black Belt
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Excellent Training; Concepts Perfectly Explained
“Just EXCELLENT! Perfection in concepts & explained every tool, got me practiced – every doubt cleared”
Lean Six Sigma Black Belt
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Well-Explained Topics Made Learning Easy
“Topics were very well explained. IT was a great session with ease of learning.”
Lean Six Sigma Green Belt
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Valuable and Practical Learning Experience
The Six Sigma Green Belt course was very informative and well-structured. It helped me understand key concepts like DMAIC, process improvement, and data-driven decision-making. The examples and case studies made the topics practical and easier to apply in real-world scenarios. Overall, it was a valuable learning experience that enhanced my problem-solving and analytical skills.
Lean Six Sigma Green Belt
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Skilled Trainer in Business Excellence Knowledge
“Trainer is very good in business excellence skill and thereto knowledge of the field “
Lean Six Sigma Green Belt

