Senior Water Treatment Systems Engineer (RO & Desalination)

W3Global; Huntington Beach (CA); On-site; USD 110,000 - 160,000; Full time

Job summary

W3Global is seeking an experienced Senior Mechanical/Process Engineer to design and support custom reverse osmosis and water treatment systems for marine, municipal, industrial, and commercial applications. The role spans the full project lifecycle from process design to field commissioning.

Responsibilities include equipment sizing, P&ID development, and collaborating with production, suppliers, and customers. Travel for commissioning and service is expected as needed.

Qualifications

• Bachelor's degree in Mechanical, Chemical, Environmental, or related engineering.
• 7+ years of relevant engineering experience preferred.
• Experience with reverse osmosis, desalination, industrial water treatment, process equipment, packaged systems, or similar equipment preferred.
• Strong understanding of pumps, piping, valves, pressure vessels, instrumentation, and process equipment.
• Ability to read and develop P&IDs and engineering drawings.
• Experience taking engineered equipment from design through fabrication and commissioning.
• Strong troubleshooting and problem-solving abilities.
• Willingness to travel periodically for commissioning, service, and customer support.

Responsibilities

• Design reverse osmosis, desalination, filtration, and packaged water treatment systems.
• Develop and review P&IDs, process calculations, equipment specifications, and bills of material.
• Size and select pumps, membranes, pressure vessels, filters, valves, instrumentation, piping, and related equipment.
• Review customer specifications and develop compliant technical solutions.
• Support preparation of technical proposals and customer clarification responses.
• Work directly with production personnel during system fabrication and testing.
• Develop FAT procedures and participate in or lead factory acceptance testing.
• Support installation, startup, commissioning, and troubleshooting at customer sites.
• Work directly with customers, suppliers, contractors, and internal teams to resolve technical issues.
• Maintain and improve engineering standards, calculations, documentation, and design practices.
• Document legacy systems and support continued development of standardized designs.
• Provide technical support for field service and existing equipment.

Skills

Troubleshooting

Problem-solving

Communication

Documentation

Project management

Education

Bachelor's degree in Mechanical, Chemical, Environmental, or related engineering

Tools

AutoCAD

Job description

W3Global is seeking an experienced Senior Mechanical/Process Engineer to design and support custom reverse osmosis and water treatment systems for marine, municipal, industrial, and commercial applications. The role spans the full project lifecycle from process design to field commissioning.

Responsibilities include equipment sizing, P&ID development, and collaborating with production, suppliers, and customers. Travel for commissioning and service is expected as needed.