Senior Process Engineer, LNG & Cryogenic Skid Packages

Nikkiso Clean Energy & Industrial Gases; Irvine (CA); On-site; USD 85,000 - 120,000; Full time

Job summary

The Senior Process Engineer at Nikkiso Clean Energy & Industrial Gases leads process system design and simulation for skid-mounted and modular packages within an EPC environment. You will develop the design basis, PFDs, P&IDs, and heat/mass balances, ensuring operability and alignment with vendor data and operating philosophy.

You will own steady-state and dynamic process models using Aspen HYSYS, validate against design basis and conditions, and coordinate with mechanical, I&C, and design teams

Qualifications

• Bachelor’s degree in Chemical Engineering.
• 10–15+ years in oil & gas, LNG, cryogenic, or EPC.
• Advanced proficiency in Aspen HYSYS, Aspen Plus, UniSim.
• Experience with skid-mounted systems and modular design.
• Strong understanding of engineering workflows.

Responsibilities

• Develop and lead Process Design Basis, PFDs, P&IDs, and heat and material balances.
• Define operating philosophy including startup, shutdown, and upset conditions.
• Develop, own, and maintain process simulation models using Aspen HYSYS.
• Coordinate with Mechanical, I&C, and Design teams to align outputs.
• Support FAT, commissioning, startup, and troubleshooting.

Skills

Strong system-level thinking

Execution-focused mindset

Coordination & communication

Translate simulation into design

Education

Bachelor’s degree in Chemical Engineering

Tools

Aspen HYSYS

Aspen Plus

UniSim

Job description

The Senior Process Engineer at Nikkiso Clean Energy & Industrial Gases leads process system design and simulation for skid-mounted and modular packages within an EPC environment. You will develop the design basis, PFDs, P&IDs, and heat/mass balances, ensuring operability and alignment with vendor data and operating philosophy.

You will own steady-state and dynamic process models using Aspen HYSYS, validate against design basis and conditions, and coordinate with mechanical, I&C, and design teams