OpenTrain is hiring a Parametric CAD Modeling and Review Specialist to create, edit, and review parametric 3D CAD models of mechanical parts and assemblies to train AI systems. Candidates should have professional experience with parametric CAD platforms (such as FreeCAD, Autodesk Fusion 360, SolidWorks, or Inventor), GD&T knowledge, and design-for-manufacturing expertise. This is a remote, part-time contractor role open worldwide requiring 20+ hours per week in English.