10 lean consultants
Bose Corporation, Jabil and Honeywell Technologies all appear in the backgrounds of these lean consultants, most of whom held in-house lean, continuous improvement or operational excellence roles; two are Six Sigma Master Black Belts and one is a Singapore-based managing director whose firm uses Lean 6 Sigma and TPM. They suit a first lean program, a multi-site rollout or a small manufacturer that wants training its staff can keep using.
Professionals to explore
David Dubinsky
LinkedInExperience: President (Lean Sensei, Operational Excellence, Transformation Expert, Consultant, Coach) · Op-Excellence
Operations improvement and transformation consulting for Fortune 500 and mid-market companies across North America, Asia, South America and Europe, including lean manufacturing, lean service and lean healthcare, is what David Dubinsky provides as President (Lean Sensei, Operational Excellence, Transformation Expert, Consultant, Coach) at Op-Excellence since 2009. David was Lean Sensei Senior Consultant at Simpler/JWA Consulting (IBM Health) (2014-2016) and Vice President NA Industrial Practice at Kepner-Tregoe (2007-2009).
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David Shiplett
LinkedInExperience: Senior Lean Consultant · The ProAction Group
David Shiplett has been Senior Lean Consultant at The ProAction Group since 2022, Principal at Blue Wall Consulting since 2019 and Partner at Your Consulting Coach since 2026, with plant and enterprise lean work in 5S, visual factory, SMED, TPM, Kanban, JIT, Six Sigma, TRIZ and value stream mapping. David was Regional Operational Excellence Leader at Tempur Sealy International (2015-2019) and Supplier Development Leader at Smith+Nephew (2014-2015).
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Greg Leatherman
LinkedInExperience: Lean Consultant · Practical Lean Enterprise
Before founding Practical Lean Enterprise, where Greg Leatherman has been Lean Consultant since 2018, Greg spent the years from 2001 to 2017 at Bose Corporation as Engineering and Operations Manager, Lean Manufacturing Manager and Supplier Lean Engagement Manager (2011-2017). A Six Sigma Black Belt with Lean Enterprise implementation experience and manufacturing work at Bose, Ford Motor, Tenneco Automotive and General Dynamics, Greg fits supplier lean programs.
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Holly Blair
LinkedInExperience: Founder & Principal Consultant Lean Six Sigma Master Black Belt · Lean Possibilities
For a first lean program at a smaller plant, Holly Blair is the pick: Holly founded Lean Possibilities and has been its Founder & Principal Consultant Lean Six Sigma Master Black Belt since 2018, partnering with small-to-mid-size Canadian manufacturing companies to reduce operating costs, improve quality, increase throughput and build Lean systems and processes. Holly also wrote Lean Transformation for Small & Mid-Size Manufacturers (2025) and was Manufacturing Business Analyst at Husky Energy (2018-2020).
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John Lagos
LinkedInExperience: Lean Six Sigma Consultant · Lean Kaizen Consulting
Small and midsize businesses in services and manufacturing, and non-profit organizations, get delivery-based services from John Lagos as Lean Six Sigma Consultant at Lean Kaizen Consulting since 2020. At Honeywell Technologies, John was Director Program Management - Manufacturing SaaS (2017-2020), Lean Six Sigma Transformation Site Leader - Honeywell HOS (Manufacturing) (2013-2015) and Sr. Program Manager - Lean Aerospace Repair and Overhaul Campus (2010-2013), useful for lean in repair and service settings.
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Manny Veloso
LinkedInExperience: Lean Consultant Six Sigma Master Black Belt · CI Consulting Services, LLC
Building skills in your own staff fits Manny Veloso, Lean Consultant Six Sigma Master Black Belt at CI Consulting Services, LLC since 2018, who helps companies understand their improvement opportunities and delivers project-based certifications in which students solve real-world problems for the client. Manny was Lean Implementation Consultant Master Black Belt at DVIRC (2004-2018), an ASQ ConnEx Instructor (2020-2024) and Lean Six Sigma Black Belt at Trane (2001-2004).
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Matthew Rassi
LinkedInExperience: Lean Manufacturing Consultant & Guide · Twenty Helping Hands LLC
Helping client teams apply lean principles to their own business, by engaging and guiding them to improve their processes, is the work of Matthew Rassi as Lean Manufacturing Consultant & Guide at Twenty Helping Hands LLC since 2018. Matthew was Director of Operations and Continuous Improvement (2017-2022) and Plant & Engineering Manager (2013-2015) at Endoplus, and has been an Advisory Board Member at Lean4Gain since 2024.
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Shawn Klinge
LinkedInExperience: Principal Consultant · Klinge Lean Solutions LLC
Shawn Klinge has been Principal Consultant at Klinge Lean Solutions LLC since 2024, right after VIce President of Operations- Process Excellence at WOW Logistics (2022-2024). Shawn was Executive Director of Process Excellence at Olympus Surgical Technologies Americas-OSTA (2016-2022) and Operational Excellence North America Leader at DePuy Synthes Companies (2013-2016), and cites lean strategy deployment at Boeing, Raytheon Aircraft and Johnson & Johnson as a Six Sigma Black Belt and Senior Lean Sensei.
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Twan Kersten
LinkedInExperience: Sr. Consultant and Managing Director · Lean Consult Asia
From Singapore, Twan Kersten has been Sr. Consultant and Managing Director at Lean Consult Asia since 2021, an operational excellence consulting and training firm using Lean 6 Sigma and TPM supported by smart connected factory technology, and International Expert Operational Excellence, WCOM, Lean, TPM and I4.0 at EFESO Management Consultants since 2022. Twan was also Lean Advisor at ExxonMobil (2025-2026) and TPM and Supply Chain Management Consultant at Kroger (2023-2024).
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Walt Garvin
LinkedInExperience: Lean Six Sigma & Industrial Engineering Consultant · Steadfast Partners
Combining lean with industrial engineering at scale fits Walt Garvin: Lean Six Sigma & Industrial Engineering Consultant at Steadfast Partners since 2020, Professor of Practice at Clemson University College of Engineering, Computing and Applied Sciences (2018-2020), and Vice President of Lean Six Sigma & Industrial Engineering at Jabil (2009-2018). Walt was also Global Technical Director - Consumer Electronic Division (2006-2009) at Jabil.
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Choose the right perspective
For a first program at a small or mid-size business, Holly Blair and John Lagos focus on that kind of client, Matthew Rassi on guiding teams to improve their own processes, and Manny Veloso pairs projects with certification so your staff keep the skills. Enterprise or multi-site deployment suits Shawn Klinge, Walt Garvin or David Dubinsky, who also covers lean in service and healthcare; Twan Kersten and David Shiplett are the TPM picks, and Greg Leatherman fits supplier lean programs.
Questions to take into the conversation
- 01Which lean tools, such as 5S, SMED or value stream mapping, should a plant start with, and which should wait?
- 02How do you run a kaizen event so the gains are still in place six months later?
- 03When is TPM worth adding to a lean program, and how do you measure its effect on equipment uptime?
About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.