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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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Rachna Sharma
Team Lead – Training & Quality, Mastech Digital
Real-Life Industry Examples Enhanced Understanding
“Real-life and industry examples were effectively used, enhancing my understanding and appreciation of the course’s practical applications.”
Lean Six Sigma Green Belt
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Sourav Singh
Assistant Manager, American Express
Training Evaluation: Highly Cohesive and Well-Connected Topics.
“The training had a great flow, and each topic connected well, making the entire course cohesive.”
Lean Six Sigma Green Belt
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Nagaarjun Sridhar
Executive, Amneal Pharmaceuticals Private Limited
Effective Course: Excellent Teaching, Material, Pace
“The teaching style was very good and the course material, delivery, and pace were of high quality. The course was systematic and well-paced, which I found very thorough.”
Lean Six Sigma Green Belt
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Satishkumar Jain
Global Technical Project Manager, Merck
Tough Concepts Made Easy with Clear Explanations
“The course’s rich content, practical examples, and clear explanations made even the toughest concepts easy to understand.”
Lean Six Sigma Green Belt
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Abhin A
student, Amrita School of Business
Class Structure Effective for Next Training Level.
“The structure of the class, which prioritized questions, opinions, and then discussions, was highly effective, making me feel all set for the next level in my training.”
Lean Six Sigma Green Belt
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Nithya S
Student, Amrita School of Business
Examples Simplified Complex Concepts Effectively.
“The examples provided for each explanation made complex concepts much more accessible and understandable.”
Lean Six Sigma Green Belt
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GNANA SELVARAJ DANIEL
Sr. Manager, Minacs Private Limited
Well-Organized Material; Practical Sessions Effective
“The course material was well-organized and presented. The practical sessions helped reinforce the theoretical knowledge effectively.”
Lean Six Sigma Black Belt
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Gaurav Sharma
Senior Manager, ANZ Limited
Course Focused on Lean and Sigma Methods
“The course emphasized lean methodologies and Sigma methods, giving me a structured approach to boost process efficiencies in a meaningful way.”
Lean Six Sigma Green Belt

