LEAH A. KUNZELMAN
Grass Lake, MI
Summary
Global supply chain and operations executive with 20+ years of progressive leadership experience across supply planning, production planning, procurement, sourcing, and plant operations in complex, multi-site manufacturing environments. Proven track record of leading global teams, deploying S&OP and Integrated Business Planning (IBP) frameworks, and delivering measurable improvements in service levels, forecast accuracy, inventory optimization, working capital, and cost reduction.
Recognized for building high-performing organizations, driving operational excellence, and aligning demand, capacity, and inventory strategies to business objectives. Trusted advisor to senior leadership with deep experience in P&L ownership, network and capacity planning, supplier management, and large-scale transformation initiatives across automotive, aerospace, sensing technologies, and medical device manufacturing.
Strategic yet execution-focused leader with expertise in advanced planning systems (Kinaxis, SAP, ERP platforms), change leadership, and talent development. Consistently delivers results in fast-paced, regulated, and highly competitive environments by translating corporate strategy into disciplined execution and sustained performance.
Overview
2026
2026
years of professional experience
Work History
Global Director, Supply Planning
Eaton Corporation
11.2025 - Current
- Lead global supply planning organization spanning six manufacturing sites, overseeing network planners responsible for rough-cut capacity planning and master production scheduling.
- Serve as pilot executive lead for deployment of Sales & Operations Execution within Kinaxis Maestro, establishing standard work and governance for broader rollout.
- Partner with operations, finance, and commercial leadership to align demand, capacity, and inventory strategies across global manufacturing network.
Director, Supply Chain Management - Light Vehicle
Eaton Corporation
02.2023 - 11.2025
- Directed regional materials leadership across six sites supporting new product launches, inventory optimization, customer delivery, and cost-out initiatives.
- Led S&OP transformation improving maturity from 55% to 83% and reducing forecast error.
- Sponsored talent development initiatives including career roadmaps, community engagement cadence, and university partnerships.
- Served as executive sponsor for Michigan State University College of Engineering relationship.
Global Director, Production Planning
Honeywell
06.2021 - 02.2023
- Led global production planning across multiple international sites, aligning backlog, AOP, and short-range outlooks for executive decision-making.
- Built and deployed global input/output inventory model improving forecast accuracy and scenario planning.
- Served as Interim Senior Director providing leadership continuity during executive transition.
- Led constrained master production scheduling and planning metric reviews across global sites.
Senior Supply Chain Manager, Supply Planning
Orchid Orthopedics
07.2020 - 06.2021
- Led global supply planning team across multiple sites establishing IBP governance and advanced scheduling capabilities.
- Established Integrated Business Planning (IBP) governance and advanced scheduling capabilities.
- Designed ERP health metrics and partnered with consultants to implement advanced planning at the largest machining site.
- Developed functional competencies, career ladders, and succession planning frameworks.
Director, Supply Chain Management
Parker Hannifin
04.2019 - 02.2020
- Led 49 supply chain professionals across aerospace manufacturing operations.
- Held responsibility for $250M in spend across 250 suppliers.
- Drove supplier development, inventory optimization, and indirect procurement strategy.
- Championed leadership development and succession planning initiatives.
Plant Manager
Eaton Corporation
2017 - 2019
- Oversaw 400+ employees across three shifts with $164M+ in annual sales.
- Held full accountability for safety, quality, delivery, cost, and employee engagement.
- Owned P&L responsibility for $80M+ operations.
- Led lean initiatives, productivity gains, and cultural transformation.
- Awarded the STEP Ahead Award and recognized for advancing a Zero-Incident Safety Culture.
- Selected for Eaton Advanced Leader Zone (top 13 leaders companywide annually).
Progressive Operations & Supply Chain Leadership
EATON CORPORATION
2006 - 2017
- Advanced through multiple leadership positions across supply chain, operations, and materials management within complex multi-site manufacturing environments. Led planning, procurement, production, and operational performance initiatives while supporting ERP implementations, S&OP deployment, supplier performance, and inventory optimization across multiple facilities.
- Key leadership roles included Supply Chain Manager, Operations Manager, Divisional Materials Manager, Commodity Leader, and Purchasing Team Leader.
- Directed cross-functional teams, managed significant direct material spend, implemented planning and inventory control processes, and supported large-scale operational improvements in safety, productivity, cost performance, and service delivery. Played a central role in ERP transitions, planning reorganizations, and supply chain transformation initiatives across multiple Eaton locations.
Purchasing Manager
Associated Spring
2005 - 2006
- Established MRP system and supermarket assembly for wire room operations.
- Implemented raw material rejection, barcoding, chargeback, and certification processes.
- Managed high-volume raw material inventory and P-Card program.
- Returned 70,000 pounds of rejected wire for $100,000+ credit.
- Achieved $4M+ in cost savings while supporting two plants.
Education
MICHIGAN STATE UNIVERSITY
01-2020
MBA -
EASTERN MICHIGAN UNIVERSITY
Bachelor of Arts -
MICHIGAN STATE UNIVERSITY
WASHINGTON UNIVERSITY OF ST. LOUIS
Skills
- Global Supply Chain Leadership
- Multi-Site Operations Management
- Supply Planning
- Production Planning
- Sales & Operations Planning (S&OP)
- Integrated Business Planning (IBP)
- Inventory Optimization
- Network & Capacity Planning
- Master Production Scheduling
- Demand, Capacity & Inventory Alignment
- Cost Reduction & Cost-Out Initiatives
- P&L Ownership
- Operational Excellence
- Change Leadership & Transformation
- Executive Stakeholder Engagement
- Talent Development & Succession Planning
- ERP & Advanced Planning Systems Leadership
Professional Development
Rapid Response/Executive Supply Chain Certificate- Michigan State University (2020)
Lean Leader Training – University of Michigan (2016)
Certified in Production & Inventory Management (CPIM)
Dale Carnegie – Human Relations & Labor Relations
Karrass Effective Negotiating Course
ISO 14001:2004 Certified Auditor
EBE Examiner
OpA
Ford Motor Company – Green Belt Training
Technical Summary
- Kinaxis |5S
- Theory of Constraints
- ProLaunch
- SAP
- MFG / PRO
- JD Edwards
- QuickSource (Ariba Software)
- Microsoft Office (Word, Excel, PowerPoint, Access, Outlook)
- AS400
- MAPICS
Timeline
Global Director, Supply Planning
Eaton Corporation
11.2025 - Current
Director, Supply Chain Management - Light Vehicle
Eaton Corporation
02.2023 - 11.2025
Global Director, Production Planning
Honeywell
06.2021 - 02.2023
Senior Supply Chain Manager, Supply Planning
Orchid Orthopedics
07.2020 - 06.2021
Director, Supply Chain Management
Parker Hannifin
04.2019 - 02.2020
Plant Manager
Eaton Corporation
2017 - 2019
Progressive Operations & Supply Chain Leadership
EATON CORPORATION
2006 - 2017
Purchasing Manager
Associated Spring
2005 - 2006
MICHIGAN STATE UNIVERSITY
MBA -
EASTERN MICHIGAN UNIVERSITY
Bachelor of Arts -
MICHIGAN STATE UNIVERSITY
WASHINGTON UNIVERSITY OF ST. LOUIS