César A. Arroyo

I am a Supply Chain Executive with over 15 years of experience leading end-to-end supply chain operations across planning, procurement, warehousing, and logistics. My work is focused on achieving business objectives through process standardization, talent development, cost optimization, resource availability, safety, and operational excellence. I specialize in building systematic, data-driven solutions through rigorous analysis, Lean methodologies, and structured 8D problem-solving frameworks, engaging multidisciplinary teams early to enable agile, precise, and sustainable operations.

I translate complex challenges into clear, executable operating models that deliver measurable results. I drive collaborative operating models that align and connect people, strategy, execution, and data through clearly defined performance metrics, transparent communication, and cross-functional collaboration centered on Lean operating principles, waste reduction, cost optimization, and problem resolution. I foster trusted partnerships with customers, cross-functional teams, and subject-matter experts to understand business and customer needs and turn them into effective solutions, driving continuous improvement and proactive risk management.

Logistics and Warehouse Manager at MAPIB (2025-03 – Present)

Scope: End-to-end supply chain including Customer Service, Planning, Procurement, Warehouses and Shipments. Challenge: Achieve operational excellence through process standardization, inventory control, and traceability improvements, achieving ISO 9001 certification and driving IATF 16949 certification.

• Achieved and sustained 100% OTIF performance since May 25, ensuring full customer service reliability.
• Delivered zero-defect logistics execution and zero expedite cost across suppliers and customers since April 25.
• Designed and deployed an integrated planning dashboard enabling production scheduling, inventory control, and material coverage visibility to support data-driven decision making.
• Designed and implemented a barcode-based traceability system for shipment validation and error prevention.
• Initiated a full 5S deployment across warehouse operations to improve order, safety, and visual control
• Design and implementation of the warehouse layout, including zoning & visual management for stock control.
• Introduced Kanban systems and barcode labeling to streamline material handling
• Documentation development and process review to support certification, with emphasis on material traceability and standard work procedures.

Supply Chain and Operations Manager at Freudenberg Sealing Technologies (2019-07 – 2023-10)

Scope: Planning, Logistics, Procurement, Warehousing, Operations, and Shipping. Challenge: Restore global operations, ensure customer service, and redesign critical processes and procedures across a distribution center, two operational facilities, and 18 service centers managing over 60,000 SKUs.

• Reduced import and distribution costs by over 50% through logistics optimization and shipment consolidation.
• Drove sustained revenue growth by aligning demand planning and inventory optimization.
• Reduced inventory value by 10% while navigating global supply constraints caused by COVID-19
• Ensured material availability across facilities despite pandemic disruptions.
• Established SIOP and MRP policies to improve planning accuracy, material availability, and responsiveness.
• Introduced BI dashboards to enhance visibility and support real-time operational decisions.
• Implemented logistics milestone tracking and alert systems to monitor and control international shipments.
• Oversaw SAP migration, leveraging BI data for system parameterization and operational alignment.
• Applied Lean methodologies (5S, Kanban), optimized picking routes, and transitioned to a dynamic system.

Logistics Manager at Rehau (2017-11 – 2018-09)

Scope: Production Planning, Warehousing, and Shipping

• Updated master data and inventory policies in SAP to enhance availability
• Streamlined inventory, reducing slow-moving and obsolete items
• Increased customer OTIF by 16% through targeted supply and planning improvements.
• Reduced inventory by 26.5 million MXN via ABC/XYZ turnover analysis and policy optimization.
• Detected and corrected deviations from operational standards in SAP and physical inventory count.

Head of MRO Warehouse & Procurement Planning at TREMEC (2016-07 – 2017-11)

Led the MRO and Indirect Procurement team, overseeing warehouse operations, indirect purchasing, and direct services. Drove continuous improvement initiatives through master data analysis and inventory optimization. reducing obsolete stock and improving material availability. Maintained full compliance with safety regulations

• Implemented a demand forecasting, procurement tracking system leveraging BI data, improving visibility and control over material consumption.
• Achieved zero production stoppages due to tooling, indirect materials, or service shortages.
• Recovered over MXN 8M in obsolete stock by reengineering materials and adjusting procurement parameters.
• Improved inventory turnover ratio from 4 to 3 months, optimizing working capital.
• Designed and deployed an automated alert system to detect consumption anomalies and prevent deviations.

Head of Warehousing and Logistics at Siemens (2012-10 – 2015-12)

Faced challenges in cross-departmental coordination, which led to the development of a structured planning interface.

• Process optimization, root cause analysis, and Kaizen workshops.
• Improved inventory reliability from 45% to 92%.
• Implementation of a monitoring system across sales–production–quality.

Top Talent Development Program at Siemens (2010-05 – 2013-12)

Processes: Supply Chain – Engineering – Costing at Siemens (2011-06 – 2012-10)

SAP BOM and KMAT cleanup and parameterization, cost analysis, SOP and EOP projects.

Manufacturing – Continuous Improvement at Siemens (2010-05 – 2011-06)

Green Belt Certified. Project: Wiring templates (€1.2M copper annual savings).

Planning & Scheduling Manager at Siemens (2007-04 – 2010-05)

KPI management, capacity calculation, demand forecasting, SOP-to-operations alignment.

IT Intern at Siemens (2007-01 – 2007-04)

SAP implementation support, data migration, dashboard and KPI automation.

Computer Systems Engineer