Civil Engineering CAD Designer

LJB Inc.; South Portland (ME); On-site; USD 28,000 - 50,000; Full time

Job summary

LJB Inc. in South Portland, Maine, is seeking a CAD Designer to draft site, grading, drainage and utility plans using Civil 3D. This office-based role supports civil engineering and survey projects with detailed deliverables from concept through completion.

The ideal candidate has Civil 3D proficiency, strong attention to detail, and works with engineers and surveyors to ensure accuracy. Experience in data processing and some AutoCAD Earthworks is preferred; accreditation is a plus.

Qualifications

• CAD design experience and AutoCAD Civil 3D experience.
• At least 1 year of experience in office-based data processing.

Responsibilities

• Draft and refine site, grading, drainage and utility plans using Civil 3D.
• Occasionally perform cut-fill and mass balancing analysis utilizing AutoCAD Earthworks.
• Maintain and update survey point databases, surfaces, data shortcuts, profiles, and cross-sections within Civil 3D.
• Utilize and manage a standardized field code library, ensuring consistent layering and linework across projects.
• Perform quality control checks on outgoing CAD deliverables for accuracy and completeness.
• Draft and refine topographic maps, ALTA surveys, construction staking plans, boundary plats, and as-built drawings using Civil 3D.

Skills

CAD design

AutoCAD Civil 3D

Data processing

Education

Associate’s degree

Tools

AutoCAD Earthworks

Job description

Brief Description

LJB Inc. is a fast-growing national engineering firm specializing in civil and structural engineering and geospatial, safety, health, and environmental services. The firm has a 50+ year history of leveraging new technologies to drive innovation and bring unique and sustainable value to our clients.

Brief Description

LJB Inc. is a fast-growing national engineering firm specializing in civil and structural engineering and geospatial, safety, health, and environmental services. The firm has a 50+ year history of leveraging new technologies to drive innovation and bring unique and sustainable value to our clients.

We are seeking candidates to fill the position of CAD Designer to join our team in South Portland, Maine. The CAD Designer is responsible for preparing and drafting accurate, high-quality CAD deliverables. This is an office-based position requiring a foundation in plan and graphics production, combined with a proficiency in CAD drafting and data processing. This position will include drafting efforts to support other practices and groups within LJB.

As a CAD Designer, you will support civil engineering and survey projects by producing accurate, high-quality design drawings and technical deliverables. This role is ideal for someone with strong Civil 3D skills who enjoys detail-oriented work, cross-functional collaboration, and contributing to projects from concept through completion.

Hourly Pay Range

$20 – $36 /hr based upon experience, certifications, and regional market standards.

Benefits: View our 2026 Benefits Summary

Cad Designer Essential Functions

CAD Drafting & Deliverables

• Draft and refine site, grading, drainage and utility plans, along with plan/profiles and detail sheets using Civil 3D.
• Occasionally perform cut-fill and mass balancing analysis utilizing AutoCAD Earthworks
• Maintain and update survey point databases, surfaces, data shortcuts, profiles, and cross-sections within Civil 3D.
• Utilize and manage a standardized field code library, ensuring consistent layering, symbology, and linework across all projects.
• Perform quality control checks on outgoing CAD deliverables to ensure accuracy and completeness.
• In supporting our survey department, occasionally Draft and refine topographic maps, ALTA surveys, construction staking plans, boundary plats, and as-built drawings using Civil 3D.

Communication & Coordination

• Work closely with licensed engineers, project surveyors, and design/production staff, to ensure project deliverables meet applicable standards.
• Maintain organized project records, metadata, and archive structures.
• Participate in cross-office coordination meetings to align data formats, templates, and workflows.
• Desire to innovate and solve difficult problems from inception to final deliverable
• Other Duties as assigned

Required Qualifications

CAD DESIGNER ESSENTIAL CREDENTIALS

• CAD design experience and AutoCAD Civil 3D experience.
• At least 1 year of experience in office-based data processing.

Preferred Qualifications

• Associate’s degree
• CAD production experience
• Microsoft Excel experience with advanced data manipulation and file conversion.

Core Skills

• Quality control and attention to detail
• Cross-functional communication and coordination
• Organization and project record management

Why Join LJB?

At LJB, you’ll have the opportunity to contribute to meaningful civil engineering and survey projects while growing your skills in a collaborative, supportive environment. Join a company known for diverse opportunities, strong core values, and a commitment to improving quality of life through engineering excellence.

LJB Inc. is an equal opportunity employer and prohibits discrimination and harassment of any kind. We are committed to creating a diverse and inclusive workplace where all employees are valued, respected, and have the opportunity to succeed. Employment decisions are based on qualifications, merit, and business needs, without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, genetic information, marital status, or any other protected status under applicable law. If you are a self-starting individual who wishes to join an established team that believes in excellence in the workplace, this opportunity is for you.

Keywords:

CAD Designer, Drafter, Civil Engineering, Land Development, Maine