Civil Estimator & 3D Machine Control Modeler

Thompson Construction Group, Inc.; Sumter (SC); On-site; USD 85,000 - 110,000; Full time

Benefits offered by this job

Medical, dental, vision

401(k)

Career development

Job summary

Thompson Turner Construction, a division of Thompson Construction Group, Inc., is seeking a Civil Estimator/ Machine Control Modeler in Sumter, SC. You will prepare detailed quantity takeoffs, estimates for site development, and 3D machine control models to support preconstruction and field operations.

The ideal candidate has 3+ years of civil estimating experience, proficiency in AutoCAD Civil 3D and AGTEK, and the ability to coordinate with project teams, assess risks, and drive value

Qualifications

• Bachelor’s or associate degree in a related field or higher preferred.
• 3+ years civil estimating or earthwork experience.
• Proficiency with Civil 3D and estimating software.

Responsibilities

• Prepare detailed quantity takeoffs and cost estimates for site development and civil construction projects.
• Analyze project plans, specifications, geotechnical reports, and bid documents.
• Develop estimates for earthwork, grading, site utilities, storm drainage, paving, erosion control, and other civil scopes.
• Identify project risks, opportunities, and value engineering options.
• Assist with bid preparation, proposal development, and bid reviews.
• Maintain estimating databases, production rates, and historical cost information.
• 3D Modeling & Machine Control: Create and maintain accurate 3D construction models using Civil 3D and AGTEK. Generate machine control files and surfaces for field deployment through Topcon systems.
• Develop grading, excavation, utility, and paving models from construction plans.
• Perform model quality control and validation against design documents.
• Coordinate with field personnel to troubleshoot model and machine control issues.
• Update models based on plan revisions, RFIs, and field changes.
• Support GPS‑guided equipment operations and site calibration efforts.
• Project Support: Collaborate with project managers, superintendents, and site personnel during preconstruction and construction phases.
• Assist with earthwork balancing, haul analyses, and constructability reviews.
• Provide quantity tracking and progress measurement support throughout project execution.
• Participate in jobsite visits as needed to verify project conditions and support field operations.

Skills

Civil estimating

Earthwork modeling

Surveying

Reading construction drawings

Communication

Education

Associate's or Bachelor's degree in Civil Engineering/Construction Management/Surveying

Tools

AutoCAD Civil 3D

AGTEK

HCSS Heavybid

Topcon machine control

Microsoft Office

Job description

Thompson Turner Construction, a division of Thompson Construction Group, Inc., is seeking a Civil Estimator/ Machine Control Modeler in Sumter, SC. You will prepare detailed quantity takeoffs, estimates for site development, and 3D machine control models to support preconstruction and field operations.

The ideal candidate has 3+ years of civil estimating experience, proficiency in AutoCAD Civil 3D and AGTEK, and the ability to coordinate with project teams, assess risks, and drive value