Hamza Haouchine

Hamza Haouchine is a Quality and Business Development professional with extensive experience in ISO standards, Lean Six Sigma, and process improvement. Since 2017, he has been working in the certification industry, leading initiatives across multiple sectors, including Oil & Gas, staffing, and energy systems.A tech enthusiast and lifelong learner, Hamza is passionate about exploring how technology, data, and digital tools can enhance organizational efficiency and personal productivity. As the owner of WhichCert.com, he helps professionals navigate the world of certifications with confidence. Through his writing, he bridges the gap between professional certifications, business excellence, and modern tech, helping professionals grow their skills and careers.

What Are the 4 Lean Six Sigma Certification Levels? Everything You Need to Know

People Certifications, Quality Engineering / Hamza Haouchine / November 7, 2025

There are four Lean Six Sigma certification levels, commonly referred to as “Six Sigma Belts.” Each level is represented by […]

What Are the 4 Lean Six Sigma Certification Levels? Everything You Need to Know Read More »