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. Show more Show less