Senior Process Engineer

Nikkiso Clean Energy & Industrial Gases

Senior Process Engineer designing cryogenic and industrial gas process packages for Nikkiso, a manufacturer of pumps, heat exchangers, and process systems. Owning simulation models and EPC engineering deliverables.

Posted 8/13/2026full-timeIrvine • California • 🇺🇸 United StatesSenior💰 $85,000 - $120,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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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 DesignAspen HYSYSProcess SimulationEPC ExecutionOil & Gas Industry Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Process SimulationDynamic SimulationControl ValidationEquipment Duty CalculationsProcess DatasheetsControl NarrativesCause-and-Effect InputsProcess CalculationsSensitivity StudiesOptimization Analyses

Soft Skills

Interdisciplinary CoordinationProblem SolvingCommunication

Tools & Technologies

Aspen PlusUniSim

Industry Keywords

Cryogenic ProcessesModular DesignSkid-Mounted SystemsHAZOPEPC Industries

About the role

Key responsibilities & impact

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

What you’ll need

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

Benefits

Comp & perks

Equal opportunity employer committed to diversity and inclusion
Overtime may be available as workload dictates