Mechanical Designer, Plant & Piping

The role

The Mechanical Designer will develop and maintain the 3D CAD model for piping and mechanical systems in a nuclear enrichment facility. This role focuses on detailed routing, spatial integration, and layout optimization.

What you will do

• Own and maintain the 3D CAD model for piping and mechanical systems.
• Develop, update, and maintain piping component libraries, data attributes, tagging, and system standards.
• Perform detailed routing of pipes, valves, specialty components, and supports.
• Coordinate with structural, HVAC, and electrical systems to avoid clashes and optimize layouts.
• Conduct clash detection and interdisciplinary model reviews using plant design tools.
• Produce isometric drawings, general arrangement drawings, spool sheets, and installation documentation.
• Define spool breaks and support modular construction where applicable.
• Collaborate with engineers to ensure design intent and field installation requirements are incorporated.
• Maintain as-built documentation and update models throughout the project lifecycle.

Required qualifications

• Associate’s degree or equivalent experience in Mechanical Design, Drafting, or related field.
• 3+ years of hands-on experience modeling piping systems in 3D plant design platforms.
• Proficiency with plant design software (e.g., AutoCAD Plant 3D, AVEVA E3D, SmartPlant 3D, CADWorx, or similar).
• Strong understanding of piping systems, mechanical components, and industrial layout principles.
• Ability to interpret P&IDs and specifications into accurate 3D models.
• Experience producing piping isometrics, general arrangement drawings, and fabrication documentation.
• Ability to work extended hours and weekends as necessary.

Nice to have

• Experience in nuclear, chemical, petrochemical, or other complex industrial facilities.
• Familiarity with spec-driven piping, automated part selection, and component catalogs.
• Knowledge of piping line numbering, tagging systems, and engineering data attributes.
• Experience modeling pipe supports, equipment connections, and maintenance clearances in dense layouts.
• Familiarity with model coordination and clash detection tools (e.g., Navisworks).
• Understanding of fabrication and field installation practices, including spool breaks and field fit.
• Ability to thrive in fast-paced, multidisciplinary environments.

Benefits

• Stock options
• Medical coverage
• Vision coverage
• Dental coverage
• 401(k) retirement plan

About the company

General Matter enriches uranium. The company is designing, building, and operating low-cost enrichment services in the US to produce nuclear fuel.