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Principal Mechanical Engineer

Worley Group, Inc
Monrovia, CA Full Time
POSTED ON 4/9/2026
AVAILABLE BEFORE 5/9/2026
Building on our past. Ready for the future

Worley is a global professional services company of energy, chemicals and resources experts. We partner with customers to deliver projects and create value over the life of their assets. We're bridging two worlds, moving towards more sustainable energy sources, while helping to provide the energy, chemicals and resources needed now.

Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia.

Right now, we're bridging two worlds as we accelerate to more sustainable energy sources, while helping our customers provide the energy, chemicals and resources that society needs now.

We partner with our customers to deliver projects and create value over the life of their portfolio of assets. We solve complex problems by finding integrated data-centric solutions from the first stages of consulting and engineering to installation and commissioning, to the last stages of decommissioning and remediation. Join us and help drive innovation and sustainability in our projects.

Purpose:

Join Worley's Monrovia office as a Principal Process Engineer within the Rotating Engineering Group, where you'll provide technical and leadership excellence across multidisciplinary projects. In this role, you'll lead project execution and discipline deliverables, ensuring alignment with company and client procedures while driving continuous improvement in work processes. You'll develop innovative technical solutions to complex engineering challenges, oversee and mentor a team of engineers, and support the successful delivery of safe, efficient, and high-quality project outcomes.
Responsibilities:

  • The candidate will work within a team framework of other disciplines and will have an understanding of the broad organizational implications of the work being performed.
  • Will be updating schedules and progress reports.
  • May be asked to generate budgets for new work.
  • Will be interfacing with Project Management and the Customers regularly.
  • Will be required to develop/check specifications, data sheets, technical bids, purchase orders, resolve technical queries from vendorson various Compressor and Pump equipment, able to coordinate project requirements with other disciplines, project staff and clients.
  • Will be required to maintain quality deliverables throughout the procurement of the equipment.
  • Will be required to support work share activities with overseas offices onRotating Equipmentdeliverables.
  • Will be required to develop/support hour estimation, TIC estimates, deliverable requirements and personnel loading for theRotating Engineeringscope of the project.
  • Able to support or fill in for the Mechanical lead as requested.

Qualifications

What you will bring

Technical/Industry Experience and Qualifications Requirements:

  • Thorough knowledge of applicable theories, practices, and accepted office procedures.
  • Typically, minimum of8 years of Rotating (Compressor and Pump) Engineering experience in Petroleum-Chemical Industry.
  • 5 years in other Mechanical equipment or packaged equipment.
  • Excellent written and verbal communication skills in English.
  • Emphasis on reciprocating compressor experience, with working knowledge of API 617, 614, 670 and 671.

Preferred Qualifications

  • Knowledge of API, ANSI, NEMA, ASTM specifications.

Additional Information:

  • Positions located in in Monrovia, CA, Worley office location and not eligible to support remotely.
  • May berequired to travel to the vendors facilities.
  • Salary Range $142,508-$209,571 commensurate with experience and level of position.
  • Benefits: Eligible for PTO, 401k, medical, vision, dental, etc.

Education - Qualifications, Accreditation, Training:

Required:

  • BS or MS in Mechanical Engineering or equivalent.

Preferred:

  • Relevant professional registration preferred.

San Francisco

Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

Los Angeles

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

Moving forward together

We're committed to building a diverse, inclusive and respectful workplace where everyone feels they belong, can bring themselves, and are heard. We provide equal employment opportunities to all qualified applicants and employees without regard to age, race, creed, color, religion, sex, national origin, ancestry, disability status, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, citizenship status or any other basis as protected by law.

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.

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.

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Worley is an equal opportunity employer and we create a working culture that embraces diversity and promotes inclusion and flexibility.

 

Salary.com Estimation for Principal Mechanical Engineer in Monrovia, CA
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