Senior CAD Designer — Civil 3D & Land Development

LJB Inc.; South Portland (ME); On-site; USD 75,000 - 94,000; Full time

Job summary

LJB Inc. is seeking a Senior CAD Designer in South Portland, Maine. The role focuses on producing accurate CAD deliverables for land development using Civil 3D and AutoCAD Earthworks, with strong production coordination across teams.

Office-based position requiring deep Civil 3D expertise, data processing skills, and the ability to support CAD workflows, data integrity, and project standards.

Qualifications

• Advanced AutoCAD Civil 3D experience required, including surfaces, alignments, profiles, corridors, data shortcuts, plan production tools, and CAD standards.
• 5+ years of progressive office-based CAD production, Civil 3D drafting, and data processing.
• Microsoft Excel - advanced data manipulation, file conversion, quantity support, and coordination of project data used in CAD production.

Responsibilities

• Lead development, refinement, and quality review of site, grading, drainage, utility, plan/profile, and detail sheets using Civil 3D.
• Perform cut-fill and mass balancing analysis using AutoCAD Earthworks to support decisions.
• Maintain survey point databases, surfaces, data shortcuts, profiles, and cross-sections in Civil 3D with data integrity.
• Develop and manage a standardized field code library for consistent CAD production across projects.
• Perform quality control reviews of CAD deliverables prior to release; resolve production issues.
• Draft/review topographic maps, ALTA surveys, staking plans, boundary plats, and as-builts as needed using Civil 3D.

Skills

Civil 3D

AutoCAD

Excel

Data processing

Tools

AutoCAD Earthworks

Job description

LJB Inc. is seeking a Senior CAD Designer in South Portland, Maine. The role focuses on producing accurate CAD deliverables for land development using Civil 3D and AutoCAD Earthworks, with strong production coordination across teams.

Office-based position requiring deep Civil 3D expertise, data processing skills, and the ability to support CAD workflows, data integrity, and project standards.