Mechanical System Engineer Jobs in Riverside, CA

Nikkiso Clean Energy & Industrial Gases is a leading provider of cryogenic pumps, heat exchangers, process systems, services, and solutions for the LNG and industrial gases industry. We are a subsidiary of Nikkiso Company Ltd, a leading industrial manufacturer headquartered in Tokyo, Japan, with over $1.5 B in annual revenue, 8000 + employees worldwide, and publicly traded on the Tokyo Stock Exchange.

The Turbomachinery Auxiliary Systems Engineer is responsible for the design, specification, integration, and commissioning support of auxiliary systems for turboexpanders, compressors, turbines, and other rotating equipment used in energy, industrial gas, cryogenic, geothermal, and process industries. The engineer develops complete system solutions including lubrication systems, seal gas systems, cooling systems, instrumentation, controls, piping, and skid-mounted process equipment while ensuring compliance with applicable industry standards and customer specifications. 

System Design & Engineering

• Design and develop auxiliary systems for turboexpanders, compressors, turbines, pumps, and rotating equipment.
• Prepare process flow diagrams (PFDs), piping and instrumentation diagrams (P&IDs), equipment layouts, and system architecture drawings.
• Specify and size auxiliary equipment including:
• API lubrication oil systems
• Seal gas systems
• Coolers and heat exchangers
• Pumps and filtration systems
• Pressure vessels and accumulators
• Control valves and instrumentation
• Interconnecting piping systems
• Perform process calculations for flow, pressure drop, heat transfer, and equipment sizing.

Equipment Specification 

• Develop technical specifications, datasheets, bills of materials, and procurement packages.
• Select equipment in accordance with customer requirements and industry standards.
• Evaluate vendor quotations and review supplier engineering documentation.
• Ensure compatibility and integration of mechanical, process, electrical, and control systems.

Project Execution 

• Support projects from proposal through commissioning.
• Participate in design reviews, HAZOPs, customer meetings, and bid clarification meetings.
• Coordinate engineering deliverables across multiple disciplines.
• Manage technical interfaces with customers, EPC contractors, and equipment suppliers.
• Provide technical support during manufacturing, assembly, factory acceptance testing (FAT), and startup activities.

Controls & Instrumentation 

• Define instrumentation requirements and control philosophies for turbomachinery packages.
• Develop control narratives and cause-and-effect documentation.
• Support PLC/DCS interface requirements.
• Review control logic for process and machinery protection systems.

Compliance & Standards 

• Ensure designs comply with applicable standards, including:
• API 614
• API 617
• API 661
• API 670
• ASME Section VIII
• ASME B31.1 and B31.3
• ISA standards
• Customer specifications and project requirements
• Participate in design verification and quality reviews.

Commissioning & Field Support 

• Support installation, commissioning, troubleshooting, and performance testing.
• Investigate field issues and develop engineering solutions.
• Provide aftermarket support for operating equipment.
• Support root-cause analyses and reliability improvement initiatives.

• Bachelor's degree in Mechanical Engineering, Chemical Engineering, Petroleum Engineering, or related engineering discipline.
• 3-5 years' experience working as an instrument and control engineer especially in turbo machinery.
• Knowledge of the National Electric Code (NEC), UL, International Electrical Standards (IEC) , CE Directives, ATEX, etc., ISA Standards, Hazardous codes, CSA electrical panel safety codes and SIS
• Application of the above standards to cryogenic pumps and turboexpander control systems.
• Demonstrate an excellence interpersonal skills including communication, be a self-starter, have a positive make-happen attitude, to be able to handle multiple tasks, and be a team player.
• Demonstrate the ability to self-improvement.

Work Environment

This job operates in both a professional office environment and a manufacturing/production environment. Commitment to safety is essential. This role routinely uses standard office equipment such as laptop computers, photocopiers, and smartphones.

Physical Demands

While performing the duties of this job, the employee is regularly required to talk or hear. Specific vision abilities required by this job include close vision and ability to adjust focus. This would require the ability to lift files, open filing cabinets and bend or stand on a stool as necessary. 

Other Duties

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities, and activities may change at any time with or without notice.

Nikkiso CE&IG is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.