Senior Process Engineer

Jobtailor; Irvine (CA); On-site; USD 150,000 - 230,000; Full time

Job summary

Jobtailor is seeking a senior process engineer to lead the design and validation of skid-mounted and modular process packages in an EPC environment. You will develop design bases, integrate across mechanical, I&C, and package disciplines, and drive simulation-based deliverables using Aspen HYSYS, Aspen Plus, and UniSim.

You will coordinate with multiple teams, perform HAZOPs, and support FAT, commissioning, and operation.

Qualifications

• Bachelor’s degree in Chemical Engineering.
• 10–15+ years of oil & gas, LNG, cryogenic, or EPC experience.
• Advanced proficiency in process simulation tools including Aspen HYSYS, Aspen Plus, and UniSim.
• Strong experience linking simulation outputs to engineering deliverables.
• Experience with skid-mounted systems and modular design.
• Strong understanding of engineering workflows.
• Experience with dynamic simulation and control validation preferred.
• Experience with cryogenic or industrial gas processes preferred.
• Background in packaged equipment or modular systems desired.
• Ability to work overtime, including weekends, nights, and holidays, as workload dictates.

Responsibilities

• Lead process system design and technical definition for skid-mounted and modular packages.
• Develop and validate the design basis ensuring operability across mechanical, I&C, and package design.
• Develop and maintain process simulation models using Aspen HYSYS.
• Validate simulation models against design basis, vendor data, and operating conditions.
• Coordinate with Mechanical, I&C, and Design teams on sizing, control philosophy, layout, operability, and maintainability.
• Participate in HAZOPs, design reviews, and interdisciplinary coordination.
• Define process requirements for vendor packages and review vendor design, calculations, guarantees, and data.
• Support FAT, commissioning, startup, troubleshooting, fabrication, and operation.
• Resolve process-related issues during fabrication and operation.
• Ensure compliance with industry standards and client specifications.

Skills

Process Simulation

Dynamic Simulation

Control Validation

Equipment Duty Calculations

Process Datasheets

Control Narratives

Cause-and-Effect Inputs

Process Calculations

Sensitivity Studies

Optimization Analyses

Education

Bachelor’s degree in Chemical Engineering

Tools

Aspen HYSYS

Aspen Plus

UniSim

Job description

• Lead process system design and technical definition for skid-mounted and modular process packages in an EPC execution environment
• Develop and validate the process design basis, ensuring system operability and integration across mechanical, I&C, and package design
• Develop and maintain steady-state and dynamic process simulation models using Aspen HYSYS
• Validate simulation models against design basis, vendor data, and operating conditions
• Perform sensitivity studies and optimization analyses
• Generate stream tables, equipment duty calculations, and control strategy inputs
• Develop and review process datasheets, control narratives, cause-and-effect inputs, process calculations, and reports
• Coordinate with Mechanical, I&C, and Design teams on equipment sizing, control philosophy, layout, operability, and maintainability
• Participate in HAZOPs, design reviews, and interdisciplinary coordination
• Define process requirements for vendor packages and review vendor design, calculations, guarantees, and data
• Support FAT, commissioning, startup, troubleshooting, fabrication, and operation
• Resolve process-related issues during fabrication and operation
• Ensure compliance with industry standards and client specifications
• Support safety, operability, and reliability reviews

Requirements

• Bachelor’s degree in Chemical Engineering
• 10–15+ years of experience in oil & gas, LNG, cryogenic, or EPC industries
• Advanced proficiency in process simulation tools including Aspen HYSYS, Aspen Plus, and UniSim
• Strong experience linking simulation outputs to engineering deliverables
• Experience with skid-mounted systems and modular design
• Strong understanding of engineering workflows
• Experience with dynamic simulation and control validation preferred
• Experience with cryogenic or industrial gas processes preferred
• Background in packaged equipment or modular systems desired
• Ability to perform required physical activities, including standing, walking, sitting, reaching, climbing or balancing, stooping or kneeling, talking and hearing, and using fingers and hands to feel objects, tools, or controls
• Ability to work overtime, including weekdays, weekends, nights, and/or holidays, as workload dictates
• Equivalent combination of education and/or experience may be accepted

Core Competencies

Demonstrates expertise in process system design and technical definition for skid-mounted and modular process packages, with advanced proficiency in process simulation tools such as Aspen HYSYS and Aspen Plus. Capable of ensuring system operability and integration across mechanical, I&C, and package design while adhering to industry standards.

Highest-signal resume keywords

• Process System Design
• Aspen HYSYS
• Process Simulation
• EPC Execution
• Oil & Gas Industry Experience

ATS Optimization Keywords

Hard Skills

• Process Simulation
• Dynamic Simulation
• Control Validation
• Equipment Duty Calculations
• Process Datasheets
• Control Narratives
• Cause-and-Effect Inputs
• Process Calculations
• Sensitivity Studies
• Optimization Analyses

Soft Skills

• Interdisciplinary Coordination
• Problem Solving
• Communication

Industry Keywords

• Cryogenic Processes
• Modular Design
• Skid-Mounted Systems
• HAZOP
• EPC Industries

Tools & Technologies

• Aspen Plus
• UniSim