142 Results for

Chemical Engineering Jobs in Walnut, CA

Jobs

New!

Tustin, CA5 days ago

$95,000–$128,000 Per Year

4+ years of experience in application engineering and proposal development for custom industrial water and wastewater treatment systems, including aeration, clarification, disinfection, media and membrane filtration (NF, RO, UF), water softening, ion exchange, and systems for raw water, boiler water, cooling water, oily water, process water, produced water, ultrapure water, and wastewater treatment. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

New!

Pasadena, CA5 days ago

$110,000–$150,000 Per Hour

Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal. For 60+ years, we’ve built a reputation for delivering precision-engineered components with minimal rejection rates, ensuring customer satisfaction and on-time delivery in a highly competitive aerospace market.

New!

Brea, CA4 days ago

$33–$33 Per Hour

Gather, maintain, format, and analyze technical data including laboratory and material test results . • Create engineering documentation such as reports, flow charts, block diagrams, and schematics .

New!

Rancho Cucamonga, CA2 days ago

Analyze production data to identify inefficiencies and lead continuous improvement initiatives using Lean, Six Sigma, and root cause problem solving tools. Equipment & TechnologySpecify, validate, and maintain elastomer processing equipment, including mixers, extruders, molding presses, curing ovens, and inspection tools.

Wilmington, CA30+ days ago

Past projects/duties include: analyze refinery process flow data and compare to recommended optimum levels, this will help in identifying equipment failures which cause variances in capacity from the optimum levels; update information on gasoline blends and tank samples in preparation for an annual blender waiver audit; develop applications to better present process data for refinery operating decisions. Past projects/duties include: perform process calculations for the Risk Management Plan, including taking physical surveys of refinery process units; work on various process engineering projects within a Wastewater Treatment Plant; participate in inspections and/or testing that is conducted by federal, state, or local officials.

Wilmington, CA30+ days ago

$90,700–$136,100 Per Year

Duties may include the following: analyze refinery process flow data and compare to recommended optimum levels, this will help in identifying equipment failures which cause variances in capacity from the optimum levels; update information on gasoline blends and tank samples in preparation for an annual blender waiver audit; develop applications to better present process data for refinery operating decisions. Duties may include the following: perform process calculations for the Risk Management Plan, including taking physical surveys of refinery process units; work on various process engineering projects within a Wastewater Treatment Plant; participate in inspections and/or testing that is conducted by federal, state, or local officials.

Los Angeles, CA30+ days ago

Full-time

Any of the following certifications: CSP (Certified Safety Professional), CHMM (Certified Hazardous Materials Manager), CEM (Certified Environmental Manager), HAZWOPER 40-hour certification, ISO 14001 and/or ISO 45001 auditor training, DOT Hazardous Materials Transportation certification. As the Senior Manager Environmental Health and Safety - Hazardous Chemicals Logistics Operations you will lead sustainability, safety, and Environmental, Social and Governance (ESG) strategy and actions across multiple facilities to ensure sites are changing with the pace of customer demand.

Newport Beach, CA30+ days ago

$185,000–$208,000 Per Year

This is a critical leadership position responsible for sustaining process control, improving yield and quality, supporting capacity expansion, leading process development and technology transfers, and executing cost-reduction strategies. We are seeking an experienced Wet Etch Process Engineering Manager to lead and develop a high-performing team within our semiconductor manufacturing facility.

Tustin, California11 days ago

$77,800–$97,300 Per Year

New!

Tustin, California5 days ago

$176,200–$220,300 Per Year

Irvine, California30+ days ago

Remote

$115,100–$171,900 Per Year
Full-time

Demonstrated extensive knowledge of the PTC Windchill platform, including context management, user management, access control rules (ACL), object types, lifecycle management, report creation, and workflow administration. Additionally, the Engineering Applications Analyst will leverage business acumen, technical expertise, and knowledge of available software to deploy and enhance the PTC Windchill platform, particularly PDMLink.

Los Angeles, CA18 days ago

A bachelor's or higher degree in Electrical Engineering, Computer Science, Physics, Chemical Engineering, Mechanical Engineering or equivalent is preferred. Our sole focus on intellectual property enables us to more deeply understand our clients' technical needs, and our candidates' individual talents and career interests.

Tustin, CA11 days ago

Temporary

You will perform dimensional, mechanical or visual inspection of sub-assemblies or incoming parts to ensure conformance to blueprints, engineering specifications and customer requirements; collect and maintain results according to procedure; prepare part approval documentation in accordance with company and customer procedure; collect and analyze data in support of short-term projects, support the development of verification, and other instructions with graphics and text. Vertically integrated from R&D to final assembly and testing, we offer a unique combination of electrical, chemical, and mechanical product development for weapons and CBRN systems with CNC machining, injection molding, robotic welding, assembly, design, testing, and engineering capabilities.

Irvine, CA30+ days ago

We provide career opportunities that span a variety of disciplines and geographic locations, with projects that our employees plan, design, build and operate as diverse as the needs of our clients. Students with an Environmental or Civil Engineering background will work with a diverse network of senior engineers to peer interns, and across multi-discipline project teams.

Irvine, CA30+ days ago

Full-time

In North America alone, ERM has more than 300 dedicated air quality professionals assisting clients with projects as diverse as developing strategic approaches at the corporate level to upcoming regulatory drivers, to leading complex capital projects through the many hurdles associated with the New Source Review (NSR) permitting program. Advanced expertise in other environmental compliance-related areas for example: air dispersion modeling, stormwater, Spill Preventions, Control, and Countermeasure Plans, waste, water resources, Risk Management Planning, California Environmental Quality Act permitting, multi-media auditing, etc.

Brea, CA30+ days ago

Contractor

Requirements: Minimum Requirement: Minimum education requirement is high school diploma, experience in a lab environment (corporate or school) or technician experience in a regulated environment for a minimum of 6 years, experience following written procedures and working collaboratively with a team. and its 75,000 employees have a passion and commitment to help improve patient outcomes, improve the safety and efficiency of clinicians care delivery process, enable laboratory scientists to better diagnose disease and advance researchers capabilities to develop the next generation of diagnostics and therapeutics.

Brea, CA30+ days ago

Contractor

Minimum Requirement: Minimum education requirement is high school diploma, experience in a lab environment (corporate or school) or technician experience in a regulated environment for a minimum of 8 years, experience following written procedures and working collaboratively with a team. and its 75,000 employees have a passion and commitment to help improve patient outcomes, improve the safety and efficiency of clinicians care delivery process, enable laboratory scientists to better diagnose disease and advance researchers capabilities to develop the next generation of diagnostics and therapeutics.

Brea, CA30+ days ago

Contractor

Minimum education requirement is high school diploma, experience in a lab environment (corporate or school) or technician experience in a regulated environment for a minimum of 4- 6 years, experience following written procedures and working collaboratively with a team. Bachelor of Science in a technical area and at least 1-2 year of experience in a laboratory/R&D setting following written procedures and working collaboratively with a team.

Brea, CA19 days ago

Requirements: Minimum Requirement: Minimum education requirement is high school diploma, experience in a lab environment (corporate or school) or technician experience in a regulated environment for a minimum of 4-6 years, experience following written procedures and working collaboratively with a team. Client and its 75, 000 employees have a passion and commitment to help improve patient outcomes, improve the safety and efficiency of clinicians’care delivery process, enable laboratory scientists to better diagnose disease and advance researchers’capabilities to develop the next generation of diagnostics and therapeutics.

Los Angeles, CA14 days ago

$120,000–$150,000 Per Year

We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world. **ReqID:** J10150956 **Business Line:** Environment **Business Group:** DCS **Strategic Business Unit:** West **Career Area:** Engineering **Work Location Model:** Hybrid **Compensation:** USD 120000 - USD 150000 - yearly

Brea, CA30+ days ago

Requirements: Minimum Requirement: Minimum education requirement is high school diploma, experience in a lab environment (corporate or school) or technician experience in a regulated environment for a minimum of 4- 6 years, experience following written procedures and working collaboratively with a team. Client and its 75,000 employees have a passion and commitment to help improve patient outcomes, improve the safety and efficiency of clinicians' care delivery process, enable laboratory scientists to better diagnose disease and advance researchers' capabilities to develop the next generation of diagnostics and therapeutics.

Brea, CA30+ days ago

Requirements: Minimum Requirement: Minimum education requirement is high school diploma, experience in a lab environment (corporate or school) or technician experience in a regulated environment for a minimum of 6 years, experience following written procedures and working collaboratively with a team. Client and its 75,000 employees have a passion and commitment to help improve patient outcomes, improve the safety and efficiency of clinicians' care delivery process, enable laboratory scientists to better diagnose disease and advance researchers' capabilities to develop the next generation of diagnostics and therapeutics.

Brea, CA30+ days ago

Requirements: Minimum Requirement: Minimum education requirement is high school diploma, experience in a lab environment (corporate or school) or technician experience in a regulated environment for a minimum of 8 years, experience following written procedures and working collaboratively with a team. Client and its 75,000 employees have a passion and commitment to help improve patient outcomes, improve the safety and efficiency of clinicians' care delivery process, enable laboratory scientists to better diagnose disease and advance researchers' capabilities to develop the next generation of diagnostics and therapeutics.

Long Beach, CA30+ days ago

$88,000–$94,500 Per Year

Share this job with a friend (https://careers-kimley-horn.icims.com/jobs/20272/civil-engineering-analyst/job?mode=apply&apply=yes&in_iframe=1&hashed=-1834442239). We take pride in how our employee retention, robust benefits package, and company values have led to Kimley-Horn’s placement on the Fortune “100 Best Companies to Work” list for 18 years!

Long Beach, CA30+ days ago

$28–$31 Per Hour

Interns will learn one or more software programs specific to their disciplines: AutoCAD, Revit, Civil 3D, Excel, Microstation, VISSIM, Open Roads, Synchro and/or GIS. Share this job with a friend (https://careers-kimley-horn.icims.com/jobs/20276/civil-engineering-intern/job?mode=apply&apply=yes&in_iframe=1&hashed=-1834442239).

Long Beach, California30+ days ago

The process engineer will be expected to perform process engineering duties, including, but not limited to, maintaining/updating/creating P&IDs, process flow diagrams, interlocks, and control schemes; developing process design calculations to support process optimization, process hazard analysis, and capital projects; and supporting process optimization, process hazard analysis, and capital projects. Overview: SNF is a specialty chemical group whose products, water-soluble polymers, contribute to treating, recycling, preserving water, saving energy, and reducing carbon footprint.

Irvine, California10 days ago

$80,000–$180,000 Per Year

Use processes such as physical/chemical primary treatment, conventional activated sludge, biological nutrient removal, fixed-film processes, membrane bio-reactors (MBR), sidestream treatment, tertiary filtration, auxiliary wet-weather treatment, and disinfection. In this role you will lead and support design of wastewater treatment through evaluation of existing processes and facilities; treatment assessments; design of improvements, expansions, and new facilities; permitting; and construction administration.

Los Angeles, CA30+ days ago

Reporting to the Director of Process Engineering, this role will also play a key part in developing, commissioning, and operating Mote’s Advanced Testing Center (ATC), where new process innovations and control strategies are validated at pilot scale. Mote is developing a first-of-a-kind technology for woody waste biomass that removes CO2 from the air and produces clean hydrogen to help the world meet climate goals, improve air quality, and reduce wildfires.

Los Angeles, CA30+ days ago

Mote is developing a first-of-a-kind technology for woody waste biomass that removes CO2 from the air and produces clean hydrogen to help the world meet climate goals, improve air quality, and reduce wildfires. Identify and evaluate creative design solutions that optimize Mote’s process, project capital/operating costs, equipment reliability/availability, or project schedule.

New!

Lake Forest, California5 days ago

Process Engineer, Quality Technical Services, is responsible for leading the design, optimization and scale-up for manufacturing processes for various Herbalife products across multiple categories (food, dietary supplements, and acidified foods). Lead advanced data analytics to implement cost models and perform Return on Investment (ROI) calculations to prioritize departmental focus on high value return projects (i.e yield, efficiency and margin improvement).

Los Angeles, California30+ days ago

$150,000–$200,000 Per Year

As part of our team, you will work on: Projects related to municipal water and wastewater treatment plants, including but not limited to major treatment plant expansions, and critical water reuse projects that will create sustainable and resilient water supplies for the world. Preferred Qualifications: 15+ years of wastewater and reuse design experience in the field of environmental consulting engineering with an emphasis in hydraulics, physical, chemical, and biological treatment processes and treatment plant design for water, wastewater, and/or reuse.

Los Angeles, California19 days ago

$70,000–$90,000 Per Year

About the Organization: E2 Consulting Engineers, Inc. (E2) is a professional services firm established in 1988 specializing in a full spectrum of engineering services including, project engineering and design, federal base operations and infrastructure support services, gas pipeline construction and inspection services, environmental consulting and remediation, and information technology services. Overview: The Project Engineer I will join the Project Execution Team in major natural gas pipeline integrity, retrofits, pipeline replacement, and pipeline hydrotest transmission projects.

New!

Redondo Beach, CA1 day ago

$105,000–$165,000 Per Year

To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State. As a SpacecraftIntegration Engineer at Impulse, you will own all aspects of the spacecraft build from vehicle assembly through checkouts and launch site integration.

Redondo Beach, CA30+ days ago

$110,000–$150,000 Per Year

This position requires applicants to be either U.S. Persons (i.e., U.S. citizen, U.S. national, lawful permanent U.S. resident (green card holder), an individual granted asylum in the U.S., or an individual admitted in U.S. refugee status) or persons eligible to obtain an export license from the U.S. Departments of State, Commerce, or other applicable U.S. government agencies. You will work hands-on with technicians, manufacturing engineers, and supporting teams to prevent defects before they occur, rapidly diagnose failures, and continuously improve hardware reliability across spacecraft builds.

Los Angeles, California30+ days ago

The Engineer is an experienced technical leader who coordinates multidisciplinary teams, supports the start-up and integration of new treatment systems, and leads the analysis, interpretation, and documentation of complex data to develop operational strategies and design criteria essential to the successful delivery of a future full-scale Advanced Water Treatment (AWT) facility. Education and Experience: Bachelor’s degree from an accredited college or university in a related field and six years of relevant experience, of which two years must have been at the Associate Engineer level; OR Master’s degree from an accredited college or university in a related field and four years of relevant experience, of which two years must have been at the Associate Engineer level.

Carson, CA, CA30+ days ago

$70–$100 Per Hour

The ideal candidate has a strong background in medical device manufacturing, process engineering, and process validation, preferably within GMP, ISO 9001, or ISO 13485 environments. Author and maintain engineering documentation including user requirement specification (URS), drawings, test protocols, change controls, and technical reports.

New!

Hawthorne, CA1 day ago

$95,000–$115,000 Per Year

Knowledge of quality tools such as lean principles, measurement systems analysis, design of experiments, statistical process control, root cause analysis and corrective action, advanced product quality planning (APQP), metrology, process failure mode and effects analysis (PFMEA), control plans, and various problem-solving approaches. You may also be eligible for long-term incentives, in the form of company stock, stock options, or long-term cash awards, as well as potential discretionary bonuses and the ability to purchase additional stock at a discount through an Employee Stock Purchase Plan.

Irvine, California15 days ago

$95,800–$142,800 Per Year
Full-time

Fostering Teamwork & Diversity; specifically, through proactively soliciting all facts and opinions from team members, creating a constructive and open environment for sharing data. Essential Responsibilities: Work directly with the customer to understand and mitigate Quality concerns and provide appropriate timely responses for actions of containment, root cause analysis, corrective action, and effectiveness reviews.

Irvine, California22 days ago

$115,100–$171,900 Per Year
Full-time

Position Summary: The NPI Mold Design Engineer is responsible for designing, developing, and implementing new injection molds, tooling, and manufacturing processes that support the launch of new Mil/Aero interconnect products at ITT Cannon. The engineer plays a key role in cross‑functional NPI teams and supports concept development, DFM/DFA, mold flow simulation, tooling validation, and production readiness activities.

Los Angeles, CA30+ days ago

$156,000–$216,000

Reinventing how footwear is made at scale requires breakthrough materials science that can survive the brutal realities of production, scale across thousands of autonomous robotic cells, and deliver world-class product quality. Design formulations, run material production trials, test materials in our production cells, build process windows for foaming, deposition, and bonding inside the production cells.

Irvine, California30+ days ago

$96,700–$120,900 Per Year

City of Industry, CA9 days ago

$100,000–$150,000 Per Year

Consolidated Precision Products (CPP) is an industry-leading manufacturer of highly engineered components and sub-assemblies, supplying the commercial aerospace, military and industrial markets with small-to-large “function critical” products. In this role, you’ll help bring complex, high-performance aerospace components from concept to production—working alongside talented teams across engineering, tooling, machining, quality, and operations.

Lake Forest, California30+ days ago

$71,000–$80,000 Per Year

Alhambra, CA30+ days ago

Full-time

HieFo will continue to pursue the most innovative and disruptive high-power, high-efficiency, high-linearity, narrow-linewidth lasers and coherent optical communication solutions to serve the telecom, data center, optical sensing and artificial intelligence sectors. Through our recent acquisition of EMCORE's optical core assets, including the North-American based world-class indium phosphide wafer fab, HieFo Corporation has inherited more than 40 years of EMCORE's innovation in the field of optoelectronic devices.

New!

Hawthorne, CA1 day ago

$135,000–$195,000 Per Year

You may also be eligible for long-term incentives, in the form of company stock, stock options, or long-term cash awards, as well as potential discretionary bonuses and the ability to purchase additional stock at a discount through an Employee Stock Purchase Plan. While Starlink is designed for consumer and commercial use, Starshield is designed for government use, with an initial focus on earth observation, communications, and hosted payloads.

SANTA ANA, California30+ days ago

$85,000–$120,000 Per Year

Los Angeles, California30+ days ago

The successful candidate will lead the development of experimental reactor systems that enable selective metal deposition from ores, while integrating specialized flow paths, solid-handling systems, and HER-suppressing architectures. ICM translates pioneering carbon management solutions from the (laboratory) bench-scale to pre-commercial/commercial-scale devices, prototypes, and (software) solutions.

Los Angeles, California30+ days ago

Costa Mesa, CA30+ days ago

$54,567.26–$66,560 Per Year

Recognized as a technology leader, Sanmina Corporation provides end-to-end manufacturing solutions, delivering superior quality and support to Original Equipment Manufacturers (OEMs) primarily in the communications networks, defense and aerospace, industrial and semiconductor systems, medical, multimedia, computing and storage, automotive and clean technology sectors. The total rewards package also includes a variety of benefits, including health insurance coverage, life and disability insurance, savings plan, Company paid holidays and paid time off (PTO) for vacation and/or personal business and, depending on the role, may include eligibility for restricted stock unit awards and participation in a discretionary bonus program.

Costa Mesa, CA30+ days ago

$54,567.26–$66,560 Per Year

Resume Resources

Free Resume Templates Free Resume Builder

Get noticed by top employers!

Upload your resume to let employers know you're open to Chemical Engineering job opportunities. Plus, receive relevant job recommendations in your inbox.

Chemical Engineering Jobs in Walnut, CA

Jobs

Manufacturing Applications Engineer – Water & Wastewater Industrial EquipmentJobot

Quality EngineerJobot

Mechanical Engineering Technician II in Brea, CA {169357}A-Line Staffing Solutions LLC

Manufacturing EngineerIconma

Refining Chemical Engineering Intern/Co-op Summer 2026Marathon Petroleum Corporation

Refining Engineer 1 - Chemical Engineer - Intern to Full-Time ConversionMarathon Petroleum Corporation

Senior Manager Environmental Health and Safety - Hazardous Chemicals Logistics OperationsGXO Warehouse Company, Inc.

Processing Engineering ManagerProsum

Electrical Engineering Failure Analysis EngineerRivian

Sr. Manager, Battery Cell EngineeringRivian

Engineering Applications Analyst (Windchill)ITT Inc. - English US

Intellectual Property Associate - Technical/Engineering Focus #21078 Los AngelesVanguard-IP

Quality Engineering InternDesign West Technologies, Inc.

Environmental Engineering Intern (Summer 2026!)CDM Smith

Principal Consultant, Air Quality - Engineering / ScientistEnvironmental Resources Management, Inc.

Tech 1, Mechanical EngineeringApidel Technologies

Tech 3, Mechanical EngineeringApidel Technologies

Tech 2, Mechanical EngineeringApidel Technologies

Mechanical Engineering Tech 2Lancesoft

Environmental Engineering Supervisor - LeaderAECOM

Tech 2, Mechanical EngineeringTechDigital Corporation

Tech 1, Mechanical EngineeringTechDigital Corporation

Tech 3, Mechanical EngineeringTechDigital Corporation

Civil Engineering AnalystKimley-Horn

Civil Engineering InternKimley-Horn

Process EngineerSNF Holding Company

Wastewater Treatment Process EngineerGFT.

Process Controls EngineerMote, Inc.

Process EngineerMote, Inc.

Sr. Process EngineerHerbalife

Principal EngineerCarollo Engineers Inc.

Project Engineer IE2 Consulting Engineers, Inc.

Spacecraft Integration EngineerImpulse Space

Build Reliability Engineer (Composites)Impulse Space

Engineer (Water Reuse)The Metropolitan Water District of Southern California

Senior Process Engineer (Contract - 12 Months)Connexion Systems + Engineering

Process Safety Engineer (Raptor/Starship)Spacex

Quality EngineerITT Inc. - English US

NPI Mold Design EngineerITT Inc. - English US

Senior Materials Engineer, Polymer Additive ManufacturingElastium

Corrosion EngineerRivian

Product Engineer - Manufacturing / AerospaceConsolidated Precision Products

Process EngineerApplied Medical

Process Engineer, MOCVDHiefo Corporation

Sr. PCB Reliability Engineer (Starshield)Spacex

Application Engineer IINikkiso Cryogenic Industries

RSCH AND DEV ENGR 2 TXThe Regents of the University of California on behalf of their Los Angeles Campus

RSCH AND DEV ENGR 3 TXThe Regents of the University of California on behalf of their Los Angeles Campus

Manufacturing Engineer - (102563)Sanmina

Manufacturing Engineer - (102564)Sanmina

Resume Resources