Senior Process Optimization (RTO/ROMeo) & Digital Twin (PST) Engineer - Relocate to Saudi Arabia, Permanent Expat Relocation Package

About the role

We are seeking an experienced Process Simulation Twin (PST) and Optimization Engineer to join our Reliability Solutions Department (RSD) within our Global Manufacturing Excellence Center.

Global Manufacturing Excellence (GME) is the recognized Center of Excellence driving value across Saudi Aramco’s Downstream Global manufacturing portfolio.

Key Responsibilities

• Lead the development, deployment, and sustainment of PST that integrate real-time process data with rigorous equation-oriented or sequential simulation engines in alignment with corporate objectives.
• Configure and troubleshoot the connectivity between plant historians, laboratory information systems, and simulation software to ensure seamless data ingestion and reconciliation.
• Utilize PST to perform automated monitoring of facility health, detecting deviations between ideal performance and actual plant operations to identify opportunity gaps.
• Develop and maintain thermodynamic models and mathematical equations that accurately represent the behavior of various processes ensuring the PST accurately reflects the current state of the facility (including heat exchanger fouling, catalyst decay, etc.).
• Perform offline engineering studies using PST to analyze complex operational problems, debottleneck constraints, and conduct "what-if" scenarios based on current operating conditions.
• Act as the technical liaison between data teams and Operations/Process Engineering teams, leading technical sessions on model architecture, data quality, and commissioning.
• Lead process optimization sessions to de-bottleneck key process units such as CDU/VDU, Hydrocrackers, Catalytic crackers, Diesel Hydrotreaters, Isomerization.
• Benchmark process optimization KPIs with 15+ operating facilities and provide development of programs, processes, guidelines and best practices.
• Provide subject matter expertise to operating facilities Operations, Maintenance, and Engineering teams by consulting, providing awareness sessions, and participating and leading technical exchanges and conferences.

Minimum Requirements

• You must hold a Bachelor’s degree in Chemical Engineering.
• You will have a minimum of 15 years of experience in Process Simulations, Online Modeling, or Real-Time Optimization (preferably ROMeo). 20 years of experience is preferred.
• You will be able to Demonstrate expertise in process engineering and flowsheet-based processes simulation. Preferred Equation Oriented simulation.
• You will have comprehensive understanding of refinery facilities, feedstock/product movements, margins, giveaways, process yields, and mass and energy balances.
• Demonstrated experience connecting simulations to live data sources (Data Historians, OPC, etc.).
• Strong understanding of data reconciliation, model tuning, and dealing with gross errors in industrial data is also required.

Work Location and Work Schedule

Work location: Within Saudi Arabia – To be specified in Job offer

Work schedule: Full Time - To be specified in Job offer

Job Posting Duration

Job posting start date: 02/16/2026

Job posting end date: 12/31/2026