Preconstruction 3D Modeler

About the role

Harmon, Inc. is looking for a Preconstruction 3D Modeler to support early‑phase design, estimating, and system development for complex facade and glazing projects. The role focuses on using Rhino 3D and Grasshopper to create precise, data‑driven models that drive quantity takeoffs, system comparisons, and pricing strategies.

Key responsibilities

• Implement and execute parametric estimating using Rhino and Grasshopper templates.
• Develop accurate 3D models of curtain walls, storefronts, window walls, and architectural glazing systems.
• Interpret architectural drawings, details, and specifications to model facade geometry, unitization logic, infill conditions, trims, and intermediates.
• Structure models to support quantity takeoffs, system comparisons, alternates, and value‑engineering studies.
• Apply company modeling standards for layers, attributes, naming conventions, and tagging.
• Collaborate with estimating teams to align modeled quantities with pricing assumptions.
• Support design‑assist and early engineering efforts by modeling system concepts and unit breakdowns.
• Update models as designs evolve and assist with preconstruction revisions, alternates, and scope clarifications.
• Coordinate handoff to engineering and detailing teams for downstream workflows.

Required profile

• Minimum 2‑year degree in Engineering Technology or a related field.
• At least 5 years of experience with building modeling and CAD technologies.
• Proven ability to read and interpret architectural drawings.
• Experience in the AEC or construction industry, specifically with facade and glazing systems.

Required skills

• Rhino
• Grasshopper
• Revit
• AutoCAD
• Navisworks