SI Jacobson Manufacturing

ManufacturingIllinois, United States2-10 Employees

SI Jacobson Manufacturing is a U.S.-based producer offering custom sewing, injection molding, and thermoforming capabilities. With a history extending over nine decades, it serves customers in automotive, medical and healthcare, military and defense, electronics and technology, industrial tools and equipment, consumer care, and outdoor sporting goods, delivering products with speed and precision. The company uses a comprehensive workflow that starts with design and CAD engineering and continues through prototyping and bulk production, supported by a domestic facility in Lake Forest and international partners to scale as needed.

It also maintains warehousing and fulfillment to support just-in-time delivery and supply chain stability. Sustainability is integrated into operations through lean practices, energy-efficient processes, and the use of eco-friendly materials, with compliance to ISO, RoHS, and Prop 65 standards; the company provides Berry Amendment–compliant manufacturing for defense and government contracts. Its portfolio includes rugged military gear, sterile medical packaging, protective electronics cases, and durable automotive tool kits, reflecting a focus on reliable, cost-effective solutions that help clients stay competitive and resilient.

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