Mechanical Engineer

Mechanical Engineer Opportunity

Principal Mineral is building the systems, capabilities, and markets that strengthen domestic industrial capacity and secure the critical materials supply chain for generations to come. Principal Mineral is creating an integrated global manufacturing platform by acquiring industry-leading businesses, including Camden Copper, Isola Group, and Conductive Composites.

Principal Mineral is seeking an experienced Mechanical Engineer to join our Engineering Team and deliver plant modernization and capital improvement projects. You'll apply deep technical expertise and hands-on experience to ensure mechanical designs, specifications, vendor deliverables, fabrication approaches, and field execution plans are safe, technically sound, constructable, and cost-effective. This is an onsite role located in Camden, South Carolina.

As the Mechanical Engineer, you will own mechanical systems from initial concept through final startup—covering design, specification, procurement support, installation coordination, and commissioning. You'll partner across disciplines and with external vendors to support successful project delivery in industrial environments, with a focus on advanced manufacturing, automation, and continuous improvement.

Core Responsibilities

• Lead mechanical engineering scopes across project phases—from concept and feasibility through detailed design, procurement, fabrication, installation, and commissioning.
• Specify and select industrial equipment such as pumps, boilers, chillers, compressors, and HVAC systems based on operating needs, performance requirements, and safety standards.
• Prepare mechanical equipment specifications and requisition packages, support technical bid evaluations, and assist with vendor selection.
• Review drawings and ensure mechanical systems meet applicable codes and regulations, including ASME, API, and local safety requirements.
• Work with multidisciplinary EPC partners and internal teams to deliver integrated, buildable engineering packages.
• Develop and maintain engineering drawings, specifications, and project documentation.
• Track project costs and schedules to help ensure alignment with capital plans.
• Support checkouts, startup planning, and Pre-Startup Safety Reviews to transition new installations safely into active plant operations.

Key Qualifications and Skills

• Deep technical knowledge and broad practical experience to ensure mechanical designs, specifications, vendor deliverables, fabrication approaches, and field execution plans are technically sound.
• Strong experience with 2D and 3D modeling tools such as AutoCAD or SolidWorks.
• Bachelor's degree in mechanical, industrial, manufacturing, construction engineering, or a related field.
• Demonstrated experience across the full capital project lifecycle—from concept and detailed design through procurement, fabrication, construction, commissioning, and Management of Change.
• Strong written and verbal communication skills, with the ability to explain technical issues to both technical and business stakeholders.