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510 plant process engineer jobs found

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Onsite plant process engineer California
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AE
Dec 25, 2025
Full time
Senior Plant Engineer, Mechanical & Process
Antora Energy San Jose, CA
Antora builds and deploys thermal batteries to power always-on industrial operations with low-cost energy. Factory-built in the United States, Antora's modular thermal batteries deliver reliable heat and power, enabling industrial facilities of any size to decarbonize predictably and profitably. Antora is electrifying global industry while supporting U.S. manufacturing jobs, lowering costs for energy consumers, and enhancing the competitiveness of American industry. We are growing our company with people who put team and mission first, value connection through laughter and joy, and build with humility and openness. We are committed to continue building a diverse, passionate, and creative team dedicated to a future where every industrial facility, everywhere on earth, is powered by abundant, clean, low-cost energy. Position Summary We are seeking a self-driven, passionate Mechanical/Process Engineer to help deliver zero-carbon industrial heat and power through our novel...
NB
Apr 26, 2026
Full time
Systems Engineer I
Niagara Bottling, LLC Diamond Bar, CA
At Niagara, we're looking for Team Members who want to be part of achieving our mission to provide our customers the highest quality most affordable bottled water. Consider applying here, if you want to: Work in an entrepreneurial and dynamic environment with a chance to make an impact. Develop lasting relationships with great people. Have the opportunity to build a satisfying career. We offer competitive compensation and benefits packages for our Team Members. Systems Engineer I Systems engineering is an interdisciplinary of engineering that focuses on how to design and manage complex engineering systems over their life cycles. Issues such as reliability, logistics, coordination of different teams, evaluation measurements, and other disciplines that becomes more difficult when dealing with large or complex projects. Systems engineering deals with work-processes, optimization methods, and risk management tools in such projects. It overlaps technical and human-centered...
BM
Apr 26, 2026
Full time
Process Engineer
Beyond Meat El Segundo, CA
Beyond Meat, Inc., otherwise known as Beyond The Plant Protein Company™, is a plant protein company offering a portfolio of plant-based products made from simple ingredients without GMOs, no added hormones or antibiotics, and 0mg of cholesterol per serving. Founded in 2009, Beyond Meat's core products are designed to have the same taste and texture as animal-based meat while being better for people and the planet. The Company's brand promise, Eat What You Love®, represents a strong belief that there is a better way to feed our future and that the positive choices we all make, no matter how small, can have a great impact on our personal health and the health of our planet. By shifting from animal-based protein to plant-based protein, we can positively impact four growing global issues: human health, climate change, constraints on natural resources and animal welfare. Job Description The Process Engineer will report to the Head of Commercialization and work closely in a...
PC
Apr 26, 2026
Full time
Supervising Structural Engineer - Wastewater
$149,500 - $190,200 yearly
Parsons Corporation Del Rey, CA
In a world of possibilities, pursue one with endless opportunities. Imagine Next! At Parsons, you can imagine a career where you thrive, work with exceptional people, and be yourself. Guided by our leadership vision of valuing people, embracing agility, and fostering growth, we cultivate an innovative culture that empowers you to achieve your full potential. Unleash your talent and redefine what's possible. Job Description: Position Overview: Parsons is now hiring a Supervising Structural Engineer to join our water/wastewater group in the Los Angeles area, having responsible experience in providing structural engineering design and construction support services on wastewater treatment plant facilities in Los Angeles, CA. The Supervising Structural Engineer must be a licensed civil or structural engineer able to provide structural engineering design services at a Client's office located in Playa Del Rey, CA, adjacent to the Los Angeles International Airport (LAX)....
JE
Apr 25, 2026
Full time
Process Mechanical Engineer
Jedson Engineering Oxnard, CA
About the Role Jedson Engineering is seeking an experienced Process Mechanical Engineer to support projects within the Consumer Products manufacturing sector, with a specific emphasis in the papermaking industry. This role is ideal for a hands-on engineering professional who thrives in both design and field environments and enjoys working closely with production and operations. This will be a remote role to support client projects in the Oxnard and greater California area. Key Responsibilities Develop process and mechanical engineering designs for Consumer Products manufacturing systems, equipment, and facilities. Conduct on-site assessments at manufacturing plants as needed to gather data, validate designs, troubleshoot issues, and support installation or commissioning activities. Prepare detailed engineering calculations, equipment specifications, P&IDs, layouts, and technical documentation. Collaborate with cross-disciplinary engineers, project managers, and...
CE
Apr 25, 2026
Full time
Senior Systems Engineer, Mechanical Design
$140,000 - $200,000 yearly
Critical Energy Systems Hawthorne, CA
Company Description: Critical Energy is an innovative, early-stage, venture-backed cleantech company on a mission to accelerate the global energy transition through abundant, low-cost clean energy. Founded by an ex-SpaceX engineer, Critical Energy designs and manufactures factory-built, modular power plants. These rapidly deployable systems convert heat into electricity using a closed-loop thermodynamic cycle and can be installed in just weeks. Critical Energy's technology delivers high-efficiency, 24/7 power for geothermal applications and waste heat recovery (including from data center gas turbines), making clean energy practical and cost-effective for demanding sectors like AI hyperscalers and data centers. Backed by top climate and technology investors, Critical Energy is scaling rapidly. Our Mission: To build an abundant, low-cost, 100% clean energy future through groundbreaking geothermal innovation. We are a team of passionate engineers, designers, and visionaries...
EN
Apr 25, 2026
Full time
Retro Commissioning Engineer II
$111,771 - $149,204 yearly
ENFRA LLC Los Angeles, CA
About Us At ENFRA, we blend a rich history with a forward-looking vision. With over 100 years of experience, we are a pillar of stability in the energy infrastructure industry and a leader in innovative energy solutions. Our commitment to leveraging emerging technologies ensures that we remain at the forefront of the Energy-as-a-Service sector. We believe in growth-not just for our business, but for our people. Our team members have the opportunity to advance their careers in a supportive environment that values continuous learning and development. We embrace innovation and encourage creative problem solving to tackle the energy infrastructure and energy challenges of tomorrow. Inclusion is at the heart of our culture. We strive to create a workplace where every voice is heard and valued, fostering a collaborative environment where diverse perspectives drive our success. Join us to be part of a legacy of excellence and a future of groundbreaking advancements. At ENFRA,...
NB
Apr 22, 2026
Full time
Systems Engineer I
$71,314 - $103,406 yearly
Niagara Bottling, LLC Diamond Bar, CA
At Niagara, we're looking for Team Members who want to be part of achieving our mission to provide our customers the highest quality most affordable bottled water. Consider applying here, if you want to: Work in an entrepreneurial and dynamic environment with a chance to make an impact. Develop lasting relationships with great people. Have the opportunity to build a satisfying career. We offer competitive compensation and benefits packages for our Team Members. Systems Engineer I Systems engineering is an interdisciplinary of engineering that focuses on how to design and manage complex engineering systems over their life cycles. Issues such as reliability, logistics, coordination of different teams, evaluation measurements, and other disciplines that becomes more difficult when dealing with large or complex projects. Systems engineering deals with work-processes, optimization methods, and risk management tools in such projects. It overlaps technical and human-centered...
OW
Apr 22, 2026
Full time
Associate Civil Engineer or Sr Civil Engineer
Otay Water District San Diego, CA
Salary : $135,702.78 - $187,014.55 Annually Location : San Diego, CA Job Type: Full-Time Regular Job Number: 00321 Department: Engineering Opening Date: 04/20/2026 General Duties Ideal Candidate Are you a Civil Engineer who can design water/wastewater infrastructures in a time sensitive manner? Do you possess exceptional problem-solving skills? If so, we would like to hear from you. The ideal candidate will administer and evaluate consultant proposals and bids and assist in drafting and finalizing proposals and contract documents for bidding and award. Did your military service involve planning infrastructure projects, managing construction efforts, analyzing technical data, or coordinating complex operations? We're looking for individuals with strong problem-solving skills, attention to detail, and the ability to manage projects from planning through completion, capabilities often developed through military service. If you served in roles such as a Navy Civil...
AS
Apr 21, 2026
Contractor
Temporary Electrical Engineer (3.26)
$106,219 - $148,707 yearly
American States Water Company San Dimas, CA
Golden State Water Company is one of the largest investor-owned water utilities in the United States. We deliver quality, reliable water to more than 1 million people in over 80 communities throughout California. Golden State Water has been in business for more than 90 years because we put customers first. Job Summary: The Electrical Engineer is responsible for self-performing, and/or managing consultants in the preparation of electrical design services including power, process control, and telemetry for the operation and control of potable water facilities. Coordinates with electrical utilities representatives for new or upsized electrical services to water plants. Prepares process control narratives for use by SCADA integrators. Provides electrical engineering support to Company electricians. Reviews equipment and material submittals to ensure compliance with project objectives and Company standards. ESSENTIAL DUTIES AND RESPONSIBILITIES: • Performs and manages multiple...
BW
Apr 20, 2026
Full time
Electrical Engineer
$85,000 - $120,000 yearly
Barry-Wehmiller Pasadena, CA
About Us: BW Design Group is a fully integrated architecture, engineering, construction, system integration, and consulting firm committed to helping our clients realize their most critical goals from Strategy to Commercialization. As the only firm born from a manufacturing technology company to become an independent and fully integrated firm, we combine deep domain expertise in the manufacturing environment with an approach that is built to serve the dynamic needs of our clients. Rooted in our distinct culture of Truly Human Leadership, we cultivate the leaders who will define tomorrow and partner with our clients in the food & beverage, life sciences, industrial, and advanced technology industries to build the future of manufacturing and technology. Barry-Wehmiller is a diversified global supplier of engineering consulting and manufacturing technology for the packaging, corrugating, sheeting and paper-converting industries. By blending people-centric leadership with...
AE
Apr 19, 2026
Full time
Lead Plumbing Engineer
ACCO Engineered Systems Pasadena, CA
Job Description General Job Description: This position is responsible for independently delivering engineering services, from conceptual design through construction completion. Essential Duties & Responsibilities Complete project planning, coordination, and execution with some oversight Independently complete conceptual design through construction drawing development for multiple small and medium sized standard projects simultaneously Create conceptual designs certified to Building Codes, Energy Codes, and LEED standards Responsible for plumbing calculations, design and layout of equipment, plumbing systems on assigned projects Solid understanding of commercial plumbing applications such as gas piping, waste and vent, domestic water distribution, and kitchen plumbing design Appropriate engagement of engineering applications and/or managers in project decisions Proactively communicate and coordinate project designs with Project Management, Construction and...
AE
Apr 19, 2026
Full time
Lead Mechanical Engineer
ACCO Engineered Systems Pasadena, CA
Job Description General Job Description: This position is responsible for independently delivering engineering services, from conceptual design through construction completion. Essential Duties & Responsibilities Complete project planning, coordination, and execution with some oversight Independently complete conceptual design through construction drawing development for multiple small and medium sized standard projects simultaneously Create conceptual designs certified to Building Codes, Energy Codes, and LEED standards Responsible for HVAC calculations, design and layout of equipment, duct and piping systems on assigned projects Solid understanding of applications engineering such as psychrometrics, refrigeration, acoustics, and controls systems Appropriate engagement of engineering applications and/or managers in project decisions Proactively communicate and coordinate project designs with Project Management, Construction and Service departments, Controls,...
AE
Apr 19, 2026
Full time
Senior Mechanical Engineer
ACCO Engineered Systems Pasadena, CA
Job Description General Job Description: This position is responsible for independently delivering engineering services, from conceptual design through construction completion. Essential Duties & Responsibilities Expert in project planning, coordination, and execution Independently complete conceptual design through construction drawing development for large complex project or multiple projects simultaneously Create conceptual designs certified to Building Codes, Energy Codes, and LEED standards Responsible for calculations, design and layout of equipment, duct and piping systems on assigned projects Appropriate engagement of engineering applications and/or managers in project decisions Extensive experience in applications engineering including psychrometrics, refrigeration, acoustics, and controls systems Proactively communicate and coordinate project designs with Project Management, Construction and Service departments, Controls, and other trade partners...
AE
Apr 18, 2026
Full time
Senior Structural Engineer
$56.00 - $89.00 hourly
ACCO Engineered Systems Pleasanton, CA
Job Description General Job Description: This position is responsible for independently delivering structural engineering services in support of mechanical, HVAC, and piping systems within ACCO's Design-Build project environment. The Senior Structural Engineer will support projects from conceptual design through construction completion, ensuring structural integrity, code compliance, and constructability of mechanical system installations. This role works closely with project management, construction teams, and other engineering disciplines to develop practical structural solutions that support installation of equipment, ductwork, piping, and related mechanical infrastructure. The position also provides technical leadership and mentorship to engineering staff while contributing to the continued growth of structural engineering capabilities within the organization. Essential Duties & Responsibilities Expert in project planning, coordination, and execution of...
Ri
Apr 17, 2026
Full time
Sr. Exterior Trim Mechanical Design & Release Engineer
Rivian Irvine, CA
About Rivian Rivian is on a mission to keep the world adventurous forever. This goes for the emissions-free Electric Adventure Vehicles we build, and the curious, courageous souls we seek to attract. As a company, we constantly challenge what's possible, never simply accepting what has always been done. We reframe old problems, seek new solutions and operate comfortably in areas that are unknown. Our backgrounds are diverse, but our team shares a love of the outdoors and a desire to protect it for future generations. Role Summary As a Senior Mechanical Engineer - Exterior Trim you will own the design, development, and release of exterior trim systems and components (e.g., fascias, flares, claddings, rockers, underbody shields, MIC trims, appliques) across current and future Rivian programs. You will be accountable for delivering robust designs that meet cost, mass, quality, and timing targets while leading cross-functional alignment with Studio, Manufacturing, Quality,...
CI
Apr 15, 2026
Full time
Senior Electrical Engineer
Construction Innovations, LLC Mather, CA
ABOUT CONSTRUCTION INNOVATIONS: At Construction Innovations, we're all about good energy - we create solutions that make electrical installations faster, safer, and cost-effective. Our products energize hundreds of projects across the U.S. in a variety of markets including solar, battery storage, substation, and transmission and distribution. Our commitment to simplifying traditional installation methods drives us to deliver all-in-one product kits that can be installed by anyone, in a fraction of the time. Our philosophy is at the core of everything we do: Innovate to Simplify®. OVERVIEW: The Senior Electrical Engineer is responsible for the engineering of complex, standard, and non-standard transmission and distribution substations. The Senior Electrical Engineer plays a crucial role in the development of cutting-edge electrical engineering solutions; they're a technical leader and mentor who will serve as an advanced-level resource. The ideal candidate will work both...
Da
Apr 05, 2026
Full time
Manufacturing Engineer
Danaher Lodi, CA
Bring more to life. Are you ready to accelerate your potential and make a real difference within life sciences, diagnostics and biotechnology? At Cepheid, one of Danaher's 15+ operating companies, our work saves lives-and we're all united by a shared commitment to innovate for tangible impact. You'll thrive in a culture of belonging where you and your unique viewpoint matter. And by harnessing Danaher's system of continuous improvement, you help turn ideas into impact - innovating at the speed of life. At Cepheid, we are passionate about improving health care through fast, accurate, molecular diagnostic systems and tests. As a member of our team, you'll get to make an immediate, measurable impact on a global scale, within an environment that fosters career growth and development. Our mission drives us to develop groundbreaking solutions for the world's most complex health challenges. Together, we bring MORE change to the world. Learn about the Danaher Business System which...
PJ
Apr 03, 2026
Full time
Plant Engineer
Pressed Juicery, Inc. Dinuba, CA
Pressed Juicery is growing! Join our purpose-driven community and help us make an impact. About Pressed Juicery Pressed Juicery is a modern wellness brand built with the mission to empower your wellness journey. Founded in 2010 by three friends, Pressed began as a small space with a big idea: real, nourishing food should be accessible and fit into everyday life. What started in a tiny Los Angeles juice bar has grown into a dynamic omnichannel brand, with products available through thousands of retailers nationwide, alongside our company-owned stores and direct-to-consumer channel. At Pressed Juicery, we operate as one community bringing high-quality, better-for-you products to market. Guided by passion and purpose, we're building what's next in wellness. Our Mission Pressed Juicery's mission is to empower your wellness journey. Our Workplace Culture We embrace diversity, equity, inclusion, and belongingness! We speak up with radically candid communication. We...
II
Apr 02, 2026
Full time
Staff Facilities Engineer
Illumina, Inc. San Diego, CA
What if the work you did every day could impact the lives of people you know? Or all of humanity? At Illumina, we are expanding access to genomic technology to realize health equity for billions of people around the world. Our efforts enable life-changing discoveries that are transforming human health through the early detection and diagnosis of diseases and new treatment options for patients. Working at Illumina means being part of something bigger than yourself. Every person, in every role, has the opportunity to make a difference. Surrounded by extraordinary people, inspiring leaders, and world changing projects, you will do more and become more than you ever thought possible. Staff Facilities Engineer - US1 Summary The Staff Facilities Engineer will be part of the San Diego Facilities Engineering team. This role will be responsible for providing technical expertise as related to mechanical, electrical and plumbing systems within facilities equipment engineering, support...
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