Supplier Development Engineer

Marmon Holdings • Bolingbrook, IL

2d • $85,000 - $120,000 • Hybrid

About The Position

As a part of the global industrial organization Marmon Holdings—which is backed by Berkshire Hathaway— you’ll be doing things that matter, leading at every level, and winning a better way. We’re committed to making a positive impact on the world, providing you with diverse learning and working opportunities, and fostering a culture where everyone’s empowered to be their best. Our Story Since 1907, Marmon/Keystone, LLC (a Marmon Holdings/Berkshire Hathaway company) is a well-established player in the metals distribution sector, renowned for its consistent delivery of top-tier metal products and unparalleled customer service. Marmon/Keystone, LLC is comprised of 350+ full-time employees spanning over 20 locations throughout the US, Canada and Mexico. We are committed to optimizing, standardizing, and modernizing every aspect of our operations. Our mission is to drive excellence through innovation and efficiency, creating a workplace where growth knows no bounds. Our average employee tenure of 15 years reinforces our commitment to our employees’ career success and personal fulfillment! About the Role We are seeking a Supplier Development Engineer (SDE) to strengthen our external manufacturing network that supports our metals service center and value-added processing model. This hybrid position can be located in any of the following locations: Bolingbrook IL, Temperance MI, or Houston TX. Targeted compensation: $85-120k/year based on level of experience. This role focuses on ensuring that customer requirements (blueprints, specifications, and standards) are effectively executed by our suppliers through robust process capability, quality systems, and continuous improvement. You will play a key role in supporting our vertical integration strategy, partnering closely with Supply Chain to qualify, develop, and improve our supplier base in support of OEM and Tier 1 customers.

Requirements

• 5–10 years of experience in supplier quality, manufacturing engineering, or quality systems
• Experience auditing suppliers in machining, fabrication, or metals processing
• Strong knowledge of: ISO 9001 Root cause and corrective action Process capability and SPC
• Strong communication and influencing skills
• Bachelor’s degree in Engineering required
• Candidates must be authorized to work in the United States for any employer. Sponsorship for work authorization (e.g., H-1B, green card, etc.) is not available.

Responsibilities

• Conduct on-site audits to evaluate supplier quality systems and manufacturing capabilities
• Assess machining, fabrication, and inspection processes
• Review supplier documentation including: Production Part Approval Process (PPAPs) Control Plans First Article Inspections
• Monitor supplier performance (quality, delivery, responsiveness)
• Lead corrective actions and continuous improvement initiatives
• Support supplier selection, consolidation, and strategic sourcing decisions
• Partner cross-functionally to reduce supplier-driven risk and variability

Benefits

• Immediate Day-One Benefits — medical, dental, vision, 401(k) with Roth option, and company-paid life/STD/LTD.
• Paid Parental Leave (4 weeks) and Tuition Reimbursement after one year.
• A legacy brand backed by Berkshire Hathaway with the resources of a global leader and the entrepreneurial spirit of a modern competitor.
• A performance-driven culture that rewards initiative, innovation, and results.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 5,001-10,000 employees