CAD​/Product Definition Mechanical Designer Security Clearance

Position: CAD/Product Definition Mechanical Designer with Security Clearance
Amentum is seeking a technically capable CAD/Product Definition Mechanical Designer to support the development, modification, and configuration control of mechanical hardware used in U.S. Navy research, development, test, and evaluation facilities. This role is centered on translating engineering intent into accurate, manufacturable 3D CAD models, engineering drawings, bills of material, and controlled design documentation. The Mechanical Designer will work closely with design engineers, systems engineers, drafters, technicians, vendors, and field personnel to support hardware from early concept through fabrication, installation, checkout, test, sustainment, and configuration-controlled release.

The role requires strong Autodesk Inventor capability, disciplined model management, practical mechanical judgment, and the ability to produce and review engineering documentation to applicable drafting and GD&T standards. This role will also support the program's progression toward a PLM-enabled Digital Twin / Digital Thread environment. The Mechanical Designer will help ensure that CAD models, drawings, bills of material, configuration records, engineering changes, and associated technical data are structured, traceable, and maintained in a manner that supports lifecycle visibility from concept development through fabrication, installation, test, sustainment, and future configuration reuse.

This team supports multiple U.S. Navy research and development facilities associated with high-priority weapon system development programs. These facilities are one-of-a-kind and provide capabilities not commonly available elsewhere in the Department of Defense. The ideal candidate is comfortable working in a dynamic, fast-paced environment where design maturity, documentation quality, manufacturability, configuration discipline, and schedule execution are all mission-critical.

Job Duties and Responsibilities:

* 3D CAD Modeling and Mechanical Design Support
* Develop fully parametric 3D solid models, assemblies, subassemblies, and component models in Autodesk Inventor based on sketches, redlines, field measurements, legacy drawings, vendor data, and design-engineer direction.
* Translate conceptual design intent into practical mechanical geometry that supports fabrication, assembly, installation, inspection, maintenance, and future configuration reuse.
* Build and maintain Inventor assemblies using sound modeling practices, including appropriate constraints, part relationships, feature organization, model-tree discipline, and assembly-level design intent.
* Support design engineers during concept development by identifying modeling challenges, clearance issues, tolerance concerns, fabrication constraints, and potential fit, form, or function risks early in the design cycle.
* Revise and refine existing models to support design optimization, hardware changes, field modifications, tolerance adjustments, material substitutions, and configuration updates.
* Maintain model integrity throughout iterative design cycles, ensuring changes are traceable, controlled, and consistent with approved engineering direction.
* Engineering Drawings and Product Definition
* Create and support the development of 2D engineering drawings derived from 3D CAD models using Autodesk Inventor and AutoCAD.
* Define appropriate drawing views, section cuts, detail views, notes, dimensions, tolerances, parts lists, and bill-of-material structures needed to clearly communicate the design.
* Work with drafters and engineers to ensure drawings accurately reflect design intent, manufacturing requirements, inspection needs, installation constraints, and configuration-control expectations.
* Review drawing packages for completeness, internal consistency, title block accuracy, revision history, BOM correctness, and alignment with the approved CAD model.
* Apply GD&T principles consistent with ASME Y14.5, including datum selection, feature control frames, material condition modifiers, tolerance zones, and functional tolerance stack considerations.
* Support compliance with applicable ASME drawing practices, including drawing format, line types, symbols, notes, views, and documentation conventions.
* Help ensure released drawings are suitable for procurement, fabrication, inspection, assembly, installation, and long-term sustainment.
* PLM, Digital Thread, and Digital Twin Support
* Support the program's transition toward a PLM-enabled Digital Twin / Digital Thread by helping maintain authoritative, configuration-controlled digital product data.
* Ensure CAD models, drawings, bills of material, part metadata, revision histories, engineering change records, and supporting technical data are complete, accurate, and traceable within the applicable PDM/PLM environment.
* Assist engineering teams in structuring mechanical design data so that it can support downstream fabrication, inspection, installation, test planning, configuration management, sustainment, and future…