Core Stacking Technician

The Core Stacking Technician is responsible for assembling transformer core structures using precision-cut laminations in accordance with engineering drawings and build specifications. This role requires a high level of attention to detail and consistency to ensure proper alignment, sequencing, and overall assembly quality. This position is intended for experienced manufacturing personnel capable of performing precision assembly work, maintaining quality standards, and supporting process improvements during initial facility ramp-up.

• Assemble transformer core components (yokes and legs) using pre-cut laminations.
• Follow work instructions and technical drawings to ensure proper sequencing and alignment.
• Maintain stack integrity, alignment, and dimensional accuracy throughout assembly.

• Prepare core assemblies for downstream operations.

• Inspect laminations prior to assembly for damage, coating condition, or non-conformance.
• Verify alignment, sequencing, and dimensional accuracy of assembled core components.
• Identify defects such as gaps, misalignment, or damaged materials and take corrective action.
• Ensure conformance to engineering specifications and work instructions.

• Accurately log production data, material traceability, and quality yields into the ERP or production tracking system.

• Safely transport laminations and core components using overhead cranes and lifting equipment.

• Stage materials for efficient assembly while maintaining organization and traceability.

• Use hand tools, fixtures, and assembly aids required for core stacking and alignment.

• Perform basic inspection and care of tools and equipment.

• Maintain consistent assembly quality and minimize rework.
• Assist in resolving assembly issues and support continuous improvement efforts.

• High School Diploma or GED required.
• 3+ years of experience in a manufacturing or assembly environment.
• Experience in mechanical or precision assembly work.
• Ability to read and interpret technical drawings and work instructions.
• Basic use of measurement tools such as calipers and gauges.
• Strong attention to detail and manual dexterity.
• Ability to identify assembly or quality issues and take corrective action.

How to Stand Out

• Associate degree (AAS) in Electrical Technology, Mechanical Technology, Mechatronics, or related field strongly preferred.
• Experience in transformer manufacturing, electrical equipment assembly, or similar industries.
• Experience working with precision assemblies requiring tight tolerances.
• Demonstrated ability to troubleshoot assembly or build issues.
• Experience supporting process improvements or training other Technicians., Please be aware that this position may require access to technology, software, or technical data that is subject to U.S. export control laws. All offers of employment are contingent on the applicant either 1) being a “U.S. Person,” defined as a (i) U.S. citizen or national, (ii) U.S. lawful permanent resident, or (iii) other protected individual, such as a refugee under 8 U.S.C. § 1157 or asylee under 8 U.S.C. § 1158; or 2) being eligible to obtain a timely export control license or license exception from the applicable U.S. federal agency.

Sanmina Corporation (Nasdaq: SANM) is a global powerhouse in integrated manufacturing solutions serving the fastest growing segments of the global Electronics Manufacturing Services (EMS) market. We are a global engine providing the end-to-end manufacturing backbone for the world’s most essential and innovative brands. Whether it’s autonomous vehicles, life-saving medical tech, next-gen aerospace, or AI/cloud infrastructure - our integrated solutions don’t just meet standards-they redefine them.