Mechanical BIM Modeler

Job Title: Mechanical BIM Modeler Department: Engineering
- Design Reports To: BIM Manager

Location:
Qiddiya
- Saudi Arabia Availability: Immediately (Only) UNIMAC is seeking an experienced Mechanical BIM Modeler to join our Digital Delivery / BIM team. We are looking for a technically skilled BIM professional with strong expertise in mechanical and hydraulic systems modelling, infrastructure utilities, advanced Revit family creation, Civil 3D, and Dynamo automation. The successful candidate will play a key role in delivering accurate LOD 500 As-Built BIM Models, coordinated drawings and structured asset information in accordance with project requirements and international BIM standards.

Key Responsibilities
• Develop and maintain detailed 3D BIM models for mechanical, hydraulic, irrigation, water supply, fire protection and wastewater networks.
• Produce accurate LOD 500 As-Built models reflecting actual site installation, verified survey information and approved material submittals.
• Develop mechanical equipment, piping, valve and pump families using Autodesk Revit.
• Prepare as-built drawings, sections, schematics, schedules and quantity take-offs.
• Manage mechanical and hydraulic BIM coordination, including clash detection and resolution across multidisciplinary models.
• Develop and maintain Civil 3D pressure and gravity pipe networks, custom parts, fittings and project content catalogs.
• Create and maintain Dynamo scripts to automate modelling, parameter population, quantity extraction and model quality checks.
• Ensure accurate asset information, equipment tagging, COBie data and Asset Register deliverables.
• Coordinate with engineering, construction, survey, QA/QC and document control teams to ensure model accuracy and timely submissions.
• Ensure compliance with project BIM Execution Plans (BEP), ISO 19650, EIR, AIR and client digital delivery standards.
• Manage model submissions and information exchanges through Autodesk Construction Cloud (ACC) and Aconex. Technical Requirements Candidates should demonstrate strong practical knowledge of:
• Autodesk Revit: Mechanical systems, piping networks, advanced family creation and shared parameters.
• Autodesk Civil 3D: Pressure and gravity pipe networks, fittings, parts lists and data shortcuts.
• Dynamo: Workflow automation, Python/CPython3 scripting and data management.
• LOD 500: As-built modelling, survey coordination and asset information management.
• COBie & Asset Register: Asset data population, validation and handover.
• Navisworks / Revizto: Model federation, clash detection and coordination.
• ISO 19650: BIM information management and Common Data Environment (CDE) workflows.
• Autodesk Construction Cloud (ACC) / Aconex: Model publishing and document management. Qualifications & Experience
• Diploma or Bachelor's degree in Mechanical Engineering or a relevant technical discipline.
• Minimum 5 years of relevant BIM modelling experience, preferably within infrastructure, utilities or large-scale construction projects.
• At least 3 years of hands-on experience in external wet utilities, irrigation or infrastructure projects.
• Proven experience delivering LOD 500 As-Built BIM models.
• Strong practical experience in Revit, Civil 3D and Dynamo.
• Experience in COBie, Asset Registers and BIM handover documentation.
• Good understanding of multidisciplinary BIM coordination and construction requirements.
• Excellent communication, analytical and problem-solving skills. Preferred Qualifications
• Previous experience working on major infrastructure or giga-projects in Saudi Arabia.
• Experience with Qiddiya, NEOM, Red Sea Global, Diriyah or other large-scale developments.
• Autodesk professional certifications in Revit or Civil 3D.
• Knowledge of Autodesk Inventor and advanced Dynamo/Python automation.
• ISO 19650 certification or relevant BIM training.