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Chemical Engineering Startup Jobs in California (NOW HIRING)

Engineer I

Thousand Oaks, CA · On-site

$60 - $80/hr

Apply process engineering principles to support the design, specification, installation, startup ... Bachelors degree in Chemical Engineering, Mechanical Engineering, or Bioengineering preferred

Principal Controls Engineer

Petaluma, CA · On-site

$96K - $124K/yr

Support system startup, commissioning, and field troubleshooting. * Develop and maintain PLC and ... Bachelor's degree or higher in Electrical, Mechanical, Chemical Engineering, or a related field.

BA in Chemical Engineering or a closely related field with 4+ years of experience * Demonstrated hands‑on problem solving in a startup, or similarly fast‑paced environment. * Ability to perform ...

Pilot Plant Operator

Alameda, CA · On-site

$90K - $120K/yr

Support commissioning and startup of new production lines and equipment as the facility scales ... Coursework or training in metallurgy, materials science, chemical engineering, or a related field.

Sr. Combustion Engineer

El Segundo, CA · On-site

$150K - $175K/yr

Bachelor's degree in Mechanical, Aerospace, Chemical engineering, or related field * 7+ years of ... Background in startup environments or agile hardware development cycles Benefits & Compensation

Sr. Combustion Engineer

El Segundo, CA · On-site

$150K - $175K/yr

Bachelor's degree in Mechanical, Aerospace, Chemical engineering, or related field * 7+ years of ... Background in startup environments or agile hardware development cycles Benefits & Compensation

Process Engineering Intern: Contributed to the startup activities of a new chemical process, including updating procedures, redlining P&IDs, and creating Gantt charts to enhance process efficiency

Engineer I

Thousand Oaks, CA · On-site

$88 - $119/hr

Apply process engineering principles to support the design, specification, installation, startup ... Bachelor's degree in Chemical Engineering, Mechanical Engineering, or Bioengineering preferred ...

New

Apply process engineering principles to support the design, specification, installation, startup ... Bachelor's degree in Chemical Engineering, Mechanical Engineering, or Bioengineering preferred

Apply process engineering principles to support the design, specification, installation, startup ... Bachelor's degree in Chemical Engineering, Mechanical Engineering, or Bioengineering preferred

Showing results 41-60

Chemical Engineering Startup information

See California salary details

$39.5K

$86.3K

$138.2K

How much do chemical engineering startup jobs pay per year?

As of Sep 5, 2026, the average yearly pay for chemical engineering startup in California is $86,341.00, according to ZipRecruiter salary data. Most workers in this role earn between $66,600.00 and $105,100.00 per year, depending on experience, location, and employer.

What is a chemical engineering startup?

A chemical engineering startup is a new company founded to develop and commercialize innovative products, processes, or technologies in the field of chemical engineering. These startups often focus on areas such as sustainable materials, clean energy, pharmaceuticals, or advanced manufacturing solutions. They typically combine scientific research with engineering principles to address industry challenges or create new market opportunities. Success in this field often requires strong technical expertise, business acumen, and the ability to navigate regulatory requirements.

What are some typical challenges faced when working in a chemical engineering startup, and how can new hires prepare for them?

In a chemical engineering startup, employees often encounter challenges such as working with limited resources, rapidly shifting priorities, and the need to wear multiple hats beyond their core technical role. New hires should be prepared for a fast-paced, dynamic environment where adaptability and problem-solving are essential. Strong communication skills and a willingness to collaborate across disciplines—such as R&D, production, and business development—are highly valued. Being proactive in learning and seeking mentorship from more experienced colleagues can help you succeed and contribute meaningfully to the company's growth.

What are the key skills and qualifications needed to thrive in a chemical engineering startup, and why are they important?

To excel in a Chemical Engineering Startup, you need a solid background in chemical process design, problem-solving, and project management, typically supported by a degree in chemical engineering or a related field. Familiarity with simulation software (such as Aspen Plus or CHEMCAD), laboratory instrumentation, and potentially certifications like EIT or PE is highly valuable. Strong entrepreneurial mindset, adaptability, and effective communication are crucial soft skills for navigating the dynamic startup environment. These skills and qualifications are vital for rapidly developing innovative products, solving technical challenges, and successfully scaling early-stage ventures.

What is the difference between Chemical Engineering Startup vs Chemical Engineer?

AspectChemical Engineering StartupChemical Engineer
Required CredentialsBachelor's degree in chemical engineering or related field; startup experience beneficialBachelor's degree in chemical engineering; licensure optional
Work EnvironmentFast-paced, innovative, often small teams, flexible hoursIndustrial plants, manufacturing facilities, corporate offices; structured environment
Employer & Industry UsageStartups, R&D firms, small to medium manufacturing companiesLarge corporations, manufacturing plants, consulting firms

While both roles require a chemical engineering background, a Chemical Engineering Startup typically involves working in a dynamic, entrepreneurial environment focused on developing new processes or products. In contrast, a Chemical Engineer often works within established companies on ongoing operations, process optimization, and safety compliance.

What are the most commonly searched types of Chemical Engineering Startup jobs in California?

The most popular types of Chemical Engineering Startup jobs in California are:

What cities in California are hiring for Chemical Engineering Startup jobs?

Cities in California with the most Chemical Engineering Startup job openings:

Infographic showing various Chemical Engineering Startup job openings in California as of August 2026, with employment types broken down into 94% Full Time, 3% Part Time, 2% Contract, and 1% Nights. Highlights an 85% Physical, 5% Hybrid, and 10% Remote job distribution, with an average salary of $86,341 per year, or $41.5 per hour.

Senior Process Equipment Engineer - Fuel Recycling

Oklo

Santa Clara, CA • On-site, Remote

$122K - $158K/yr

Full-time

Medical, Retirement

Posted 15 days ago


Key responsibilities

  • Lead the engineering development of process equipment and integrated process systems supporting the fuel recycling facility.

  • Develop equipment specifications, data sheets, and procurement documentation, and support equipment sizing and interfaces.

  • Support process startup, commissioning activities, and develop acceptance testing procedures.


Job description

Thanks for your interest in Oklo!  We are searching for a Senior Process Equipment Engineer to join our Fuel Recycling engineering team. 

Position Description

The person in this role will lead the engineering development of process equipment and integrated process systems supporting Oklo's advanced fuel recycling facility. This role bridges process engineering, mechanical design, equipment vendors, pilot testing, and facility integration as the project advances from conceptual design through preliminary engineering and into detailed design.

The engineer will work closely with subsystem technical leads responsible for off-gas treatment, pyroprocessing, waste management, process safety, and facility engineering to mature first-of-a-kind process equipment into construction-ready designs.

This individual will become the responsible engineer for equipment realization rather than process invention.

Specific responsibilities may include:

  • Lead development of process equipment from conceptual design through IFC packages
  • Develop equipment specifications, data sheets, and procurement documentation
  • Own equipment sizing and mechanical/process interfaces for vessels, heat exchangers, filters, adsorption systems, blowers, compressors, pumps, piping systems, and specialty process equipmentPerform process calculations supporting equipment selection
  • Develop utility requirements and equipment operating envelopes
  • Work with equipment vendors to develop custom first-of-a-kind equipment
  • Evaluate vendor proposals and participate in technical bid evaluations
  • Support PFD, P&ID, process narrative, equipment list, line list, and instrument list development
  • Develop process design criteria and engineering calculations
  • Support HAZOPs, design reviews, and safety analyses
  • Support process startup planning and commissioning activities
  • Develop acceptance testing procedures (FAT/SAT)
  • Coordinate closely with facility engineering, mechanical engineering, I&C, nuclear safety, and licensing teams
  • Participate in pilot plant planning and interpretation of pilot data
  • Travel periodically to vendors, national laboratories, pilot facilities, and project partners

Minimum Qualifications:

  • Degree in chemical engineering, mechanical engineering or related field

  • 8+ years of process engineering experience

  • Experience developing process equipment

  • Experience producing engineering calculations

  • Experience with Aspen Plus, HYSYS, ChemCAD, or similar

  • Experience with industrial gas processing, chemical processing, or separations

Bonus Qualifications:

  • Experience deploying or working on pilot plants and scaling from demonstration to industrial scale at brown/green field sites

  • Commercial or nuclear industry experiences

  • Experience in adsorption systems, heat exchanger design, pressure vessel specification, compressor and blower selection

  • EPC experience, process equipment procurement and vendor management

  • FOAK technology commercialization

Competencies

We are looking for a Senior Process Equipment Engineer who is

  • Works effectively across multiple engineering disciplines and enjoys partnering with vendors, national laboratories, EPC contractors, and internal engineering teams

  • Comfortable developing engineering solutions where industry standards may not yet exist and enjoys applying first-principles engineering to novel problems

  • Passionate about clean energy 

  • An optimist at heart

  • Passionate about making advanced fission a reality

  • Willing and able to learn quickly

  • Willing to think differently and do things in new ways 

  • Comfortable in a fast-paced, highly iterative startup environment

  • Excited to think creatively, critically, and reflectively about the problems they are solving while not leaning only on what has been done before 

  • Willing to propose novel and creative solutions to technical problems

  • An excellent writer who can write in a modern active voice, so make your cover letter compelling and write it well!

  • Able to communicate technical content and results verbally

Who you are:

A startup person: You aren't driven by titles or hierarchy, and prefer efficiency to excess process. You don't need or expect to have a lot of guidance but you enjoy working in a fast-paced team. If you prefer the culture and feel of a large organization, that is great, but you likely won't enjoy working with us! There is plenty of important work and plenty of good opportunities with organizations like that.

Motivated: You are self-motivated. You bring an enthusiasm to the team, and imbue a sense of passion that goes beyond clocking in and clocking out. This isn't about a fake or arbitrary "pieces of flair" mentality or lack of work-life balance! It is about being a part of the vision and feeling a part of reaching team goals.

A team-player: Oklo genuinely is a team. We aren't about taking credit for ourselves, and we aren't about pushing blame to others. We do incredible things because we work as a team.

An excellent communicator: We need a person who is not only technically competent but also a clear and upbeat communicator.

Creative: Being creative means that when things fall outside clear scopes or processes or problems arise without clear solutions, you are able to identify it as well as invent ways to solve a problem or fill a need without micromanagement. The successful person in this job will not only be creative, but also enjoy being creative and solving open-ended problems which may change day-by-day.

Detail-oriented: This focus is a big part of excellence, consistency, and quality. Excellent grammar and spelling matter for both good communication as well as the image of the company that we put forward.

About Oklo travel requirements:

Oklo requires remote employees to travel to headquarters (Santa Clara, CA) twice a quarter annually, based on business or team needs, including attendance at team meetings, off-sites, and other company events or gatherings. For the first two weeks of onboarding, employees are required to be in person at headquarters in Santa Clara, CA.

About Oklo compensation:

Salary: $120,000-$180,000

Oklo offers flexible time off, equity, bonuses, competitive pay, 401(k), health insurance (with employer contribution), HSA, FSA, flexible work hours, wellness credits, and other benefits.

This position may involve access to information subject to U.S. export control laws. Only applicants who meet the definition of a U.S. person under applicable laws may be eligible.


About Oklo Inc.: Oklo Inc. is developing fast fission power plants to deliver clean, reliable, and affordable energy at scale; establishing a domestic supply chain for critical radioisotopes; and advancing nuclear fuel recycling to convert nuclear waste into clean energy. Oklo was the first to receive a site use permit from the U.S. Department of Energy for a commercial advanced fission plant, was awarded fuel material from Idaho National Laboratory, and submitted the first custom combined license application for an advanced reactor to the U.S. Nuclear Regulatory Commission. Oklo is also developing advanced fuel recycling technologies in collaboration with the U.S. Department of Energy and U.S. National Laboratories.

#CHOP: Oklo's Values
Collaboration: We go further, together. We bring diverse perspectives, listen actively, and build trust through transparency and respect. We work across disciplines, sharing ownership to turn complex challenges into shared successes.
Humility: We are team players who act for the good of the company and for the world. We are focused on our mission, not personal recognition.
Ownership: We take pride in what we do and how we do it. We are proactive in finding solutions and see tasks through  to completion. We are committed to delivering on our promises to provide clean, reliable, and affordable energy.
Pathfinding: We chart new ground where no path exists by approaching challenges with curiosity, courage, and creativity while navigating ambiguity.