Assistant Process Engineer Jobs in Pasadena, CA (NOW HIRING)

Company: Worley

USA-CA-Long Beach

Process

Full-time

Employment Type: Employee

Sep 4, 2026

Oct 4, 2026

Reporting Manager Title: Senior Specialist Process Engineering

Worley is a global company of energy, chemicals and resources experts headquartered in Australia. We partner with our customers to deliver projects and create value across the life of their assets. We specialize in consulting, engineering, procurement and construction across the project lifecycle, with services extending through to operations and decommissioning. Leveraging extensive experience and AI-enabled delivery, we support customers in navigating complexity as they meet today's needs and transition to more sustainable solutions.

Worley is seeking a Principal Process Engineer for the Monrovia, CA office location. In a lead position you will apply advanced engineering techniques and analysis and may serve as a technical consultant in an area of specialty. You may provide discipline supervision for one larger or one or more smaller projects.

• Generation, review, and approval of the Process deliverables: H&MB, PFD’s, P&IDs, equipment specifications, hydraulics calculation, contingency analysis & process instrument data in their assigned area.
• Conducting Process studies as needed.
• Mentoring junior Process Engineers.
• Reviewing requisitions, technical bid evaluations and providing support to other disciplines.
• Proactively resolving any discrepancies between Worley and its Customer's requirements.
• Manage process engineering services that meet Worley', its customers' and applicable statutory and regulatory specifications, on time and within budget.
• Manage process engineering project requirements.
• Manage process engineering services such as:
  • participate in relevant meetings, prepare progress reports and comply with required checking procedures.
  • ensure the project scope is clear and that changes comply with project change management processes.
  • provide advice during procurement, construction and commissioning activities. For example, oversee requisitions, technical bid evaluations and purchase order preparation.
• Act as the process engineering Lead on specific projects.
• If responsible for a team:
  • outline project requirements including actively promoting workshare, where appropriate, assign tasks and supervise progress; and
  • ensure the required services meet Worley, its customers and applicable statutory and regulatory requirements, on time and within budget.
• Proactively resolve any discrepancies between Worley and its Customer's requirements.
• Keep up to date with the latest developments and technical innovations in process engineering.
• If required, assist and support junior personnel within the process engineering team.
• Communicate effectively with the process engineering team and project stakeholders, including the Customer.
• Identify issues and problems, develop appropriate solutions, and ask for assistance when required.

Technical/Industry Experience and Qualifications Requirements:

• Experience leading and managing medium/large process teams.
• Excellent front-end design capability with expertise in conceptual design and process simulation.
• Excellent technical and practical engineering skills and ability to consistently deliver quality, accurate and timely work to Worley and its clients.
• Excellent knowledge of the fundamental requirements of process engineering, and the basic requirements of other engineering fields.
• Excellent knowledge of applicable local and international standards and statutory and regulatory specifications.
• Competent use of relevant software such as MS Office Suite and process engineering specific software.
• Extensive technical and practical experience in process engineering in the same or similar industry including experience in working in multi-disciplinary projects and teams.
• Excellent technical and practical engineering skills and ability to consistently deliver quality, accurate and timely work to Worley and its clients.
• Excellent knowledge of the fundamental requirements of the process engineering, and the basic requirements of other engineering fields.
• Excellent knowledge of applicable local and international standards and statutory and regulatory specifications.
• Competent use of relevant software such as MS Office Suite and process engineering specific software.
• Extensive technical and practical experience in process engineering in the same or similar industry including experience in working in multi-disciplinary projects and teams.
• Typically, 12 years plus process industry experience.
• Refinery experience.
• Oil and Gas experience.
• Experience leading and managing medium/large process teams.

• This position is in California.
• Salary Range $156,000-$229,500

• A recognized and relevant engineering degree or relevant postgraduate qualifications in engineering; management, project management or supervisory qualifications or equivalent.

• Chartered Professional Engineer (CPEng) status.

We will consider for employment all qualified Applicants, including those with Criminal Histories, in a manner consistent with the requirements of applicable state and local laws, including the City of Los Angeles' Fair Chance Initiative for Hiring Ordinance.” #LI-AC1

We want our people to be energized and empowered to drive sustainable impact. So, our focus is on a values-inspired culture that unlocks brilliance through belonging, connection and innovation. We're building a diverse, inclusive and respectful workplace. Creating a space where everyone feels they belong, can be themselves, and are heard.

And we're not just talking about it; we're doing it. We're reskilling our people, leveraging transferable skills, and supporting the transition of our workforce to become experts in today's low carbon energy infrastructure and technology. Whatever your ambition, there's a path for you here.

And there's no barrier to your potential career success. Join us to broaden your horizons, explore diverse opportunities, and be part of delivering sustainable change.