Mechanical Manufacturing Engineer

Alterra Holdings Company is a fast‑growing manufacturing company specializing in advanced plastics compounding, with a core focus on thermoplastic vulcanizates (TPVs), elastomers, and biopolymers. The company provides end‑to‑end solutions from R&D and formulation development to full‑scale, high‑volume production, supported by state‑of‑the‑art twin‑screw extrusion lines and an ISO‑certified testing laboratory.

With operations centered in the United States, Alterra serves a range of industries by delivering customized material solutions designed for performance, sustainability, and innovation. The company emphasizes manufacturing excellence, operating multiple production lines in a high‑throughput environment while maintaining strict quality and compliance standards.

In addition to its core compounding capabilities, Alterra integrates advanced technologies such as AI‑driven process monitoring and IoT‑enabled systems to optimize production, improve material consistency, and reduce waste, positioning itself as a forward‑looking player in modern polymer manufacturing.

This is a full‑time, on‑site role for a Mechanical Manufacturing Engineer located in Seymour, IN. The Mechanical Manufacturing Engineer will lead manufacturing process efforts to ensure final products meet standards and regulatory requirements. Day‑to‑day responsibilities include supporting quality control inspections, performing R&D trial, analyzing OEE and equipment efficiency data, generating work standards and technical packages, and collaborating with cross‑functional teams to enhance equipment reliability.

The ideal candidate will play a vital role in maintaining high‑quality standards and driving continuous improvement initiatives.

• Bachelor’s degree in Chemical, Mechanical, Polymer Engineering, or a related technical field from an accredited university
• 1–3 years of experience as a Mechanical/Manufacturing Engineer in a manufacturing environment; plastics or polymer processing experience preferred
• Proven experience supporting production lines, including ownership of documentation, compliance, and training of cross‑functional teams
• Strong working knowledge of manufacturing equipment such as extruders, blenders, feeders, dryers, blowers, pumps, etc.
• Hands‑on experience performing equipment troubleshooting and tracking major manufacturing KPIs such as OEE, waste reduction, and yield
• Strong technical expertise in equipment troubleshooting and design.
• Ability to generate, maintain, and report manufacturing documentation with high accuracy and organization
• Proficiency in core Six Sigma and problem‑solving methodologies, including RCA, 8D, CAPA, and PPAP
• Experience with preventive maintenance programs and proven record of utilizing work orders through CMMS

• Experience in plastics manufacturing, compounding, extrusion, or injection molding.
• Certified Lean Six Sigma Green Belt (CSSGB) certification from an accredited institution (ASQ)

Annual base salary range for this role is between $80K to $100K