Roy Nanz

With over 30 years of experience, Roy’s expertise includes all areas of process excellence and continuous improvement with extensive knowledge of Business Process Management, Lean, Six Sigma, Design for Lean Six Sigma, Voice of the Customer, and Kaizen Rapid Improvement techniques.

Before coming to Firefly Consulting, Roy honed his process improvement expertise at General Electric where he was at the forefront of their Six Sigma program and became one of GE's very first Six Sigma Master Black Belts. Prior to earning his Master Black Belt designation, Roy held numerous leadership positions in both design engineering and manufacturing operations. He was also a key member of the corporate team that developed GE's Design for Six Sigma training curriculum. While employed at RR Donnelley & Sons, Roy led the company’s Six Sigma program. They achieved more than $10M in annual savings.

Roy is an experienced trainer and mentor who has skillfully delivered all levels of Lean Six Sigma training to thousands of practitioners at clients across various industries worldwide. Over the course of his career, he has led dozens of Kaizen events. He is also an experienced consultant with a warmth for people as well as a focus on results.

Publications and Insights

  • “Shared Services, Operating Lean and Mean with Kaizen”, Author, HRO Europe, October/December 2008


  • Georgia Institute of Technology
    MS Electrical Engineering
  • Florida Atlantic University
    BS Electrical Engineering


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Operations Consulting

We have consulting experience with engagements as diverse as mergers and acquisitions, operations strategy, supply chain acceleration, shop-floor process improvements, and call center efficiency improvement.



Assessments are customized to meet your goals, leveraging our frameworks and knowledge of best practices from years of industry experience. Recent work has been in financial services, insurance, healthcare, manufacturing, and supply chain.

ASQ Lean and Six Sigma Conference 2019

ASQ Lean and Six Sigma Conference 2019

March 4 - 5, 2019
Phoenix, AZ

Lisa Custer, PhD presents "Data Visualizations: In the Realm of Big Data"