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Senior Process Engineer Jobs in Simi Valley, CA (NOW HIRING)

Company Description We are seeking a hands-on Process Engineer to take technical ownership of aerospace electroplating and metal-finishing processes. This is a high-impact opportunity for an engineer ...

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The position of Process Engineer is responsible for optimizing and improving manufacturing and industrial processes to enhance efficiency, quality, and cost-effectiveness. They work with various ...

The position of Process Engineer is responsible for optimizing and improving manufacturing and industrial processes to enhance efficiency, quality, and cost-effectiveness. They work with various ...

The position of Process Engineer is responsible for optimizing and improving manufacturing and industrial processes to enhance efficiency, quality, and cost-effectiveness. They work with various ...

The position of Process Engineer is responsible for optimizing and improving manufacturing and industrial processes to enhance efficiency, quality, and cost-effectiveness. They work with various ...

Process Engineer (Experienced) Company: Spectrolab, Inc. Spectrolab, Inc., a wholly owned subsidiary of The Boeing Company, seeks a Process Engineer (Experienced) to join our Process Engineering ...

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Showing results 21-40

Senior Process Engineer information

See Simi Valley, CA salary details

$77.4K

$125K

$176K

How much do senior process engineer jobs pay per year?

As of Sep 12, 2026, the average yearly pay for senior process engineer in Simi Valley, CA is $125,028.00, according to ZipRecruiter salary data. Most workers in this role earn between $107,400.00 and $138,800.00 per year, depending on experience, location, and employer.

What does a senior process engineer do?

A Senior Process Engineer is responsible for designing, optimizing, and overseeing processes within manufacturing or production environments. They analyze workflows, troubleshoot issues, and implement improvements to increase efficiency, safety, and product quality. Senior Process Engineers often lead projects, mentor junior engineers, and collaborate with cross-functional teams to ensure operational excellence. Their expertise is vital in industries like chemicals, pharmaceuticals, oil and gas, and food processing.

What are the key skills and qualifications needed to thrive as a senior process engineer?

To thrive as a Senior Process Engineer, you need a strong background in chemical or process engineering, problem-solving skills, and typically a bachelor's or master's degree in a relevant field. Expertise in process simulation software (such as Aspen Plus or HYSYS), Six Sigma or Lean certifications, and familiarity with process control systems are highly valued. Outstanding analytical abilities, leadership, and effective communication set top performers apart in this role. These skills and qualifications are crucial for optimizing processes, ensuring safety and compliance, and leading teams to achieve operational excellence.

What are some common challenges senior process engineers face when working on cross-functional teams?

Senior Process Engineers often collaborate with professionals from various departments, such as operations, quality, and maintenance. A common challenge is aligning diverse priorities and communication styles to achieve shared project goals. Successfully managing these differences requires strong interpersonal and project management skills, as well as the ability to translate technical concepts for non-engineering colleagues. Regular meetings and clear documentation can help ensure everyone stays informed and engaged throughout the process.

What is the difference between Senior Process Engineer vs Process Engineer?

AspectSenior Process EngineerProcess Engineer
QualificationsBachelor's or Master's in Engineering, often with 5+ years experienceBachelor's degree in Engineering or related field, typically 1-3 years experience
ResponsibilitiesLeading process improvements, mentoring, project managementSupporting process development, data analysis, assisting senior staff
Work EnvironmentDesign teams, manufacturing plants, R&D departmentsManufacturing facilities, engineering teams, operational support

Senior Process Engineers typically have more experience, leadership duties, and oversee complex projects, while Process Engineers focus on supporting process development and implementation. Both roles are essential in manufacturing and engineering industries, but the senior role involves greater responsibility and strategic planning.

How much does a senior process engineer earn?

A senior process engineer typically earns between $80,000 and $130,000 annually, depending on experience, industry, and location. They often have specialized skills in process optimization, project management, and may hold certifications like Six Sigma or PE licensure.

What are popular job titles related to Senior Process Engineer jobs in Simi Valley, CA?

For Senior Process Engineer jobs in Simi Valley, CA, the most frequently searched job titles are:

What cities near Simi Valley, CA are hiring for Senior Process Engineer jobs?

Cities near Simi Valley, CA with the most Senior Process Engineer job openings:

Infographic showing various Senior Process Engineer job openings in Simi Valley, CA as of August 2026, with employment types broken down into 1% As Needed, 76% Full Time, 17% Part Time, 1% Temporary, 4% Contract, and 1% Nights. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution, with an average salary of $125,028 per year, or $60.1 per hour.

Senior Process Mechanical Design Engineer

Los Angeles, CA • On-site

Arcadis
Engineering Professional Services • 10K+ employees

$97K - $133K/yr

Full-time, Part-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 8 days ago


Arcadis rating

8.7

Company rating: 8.7 out of 10

Based on 22 frontline employees who took The Breakroom Quiz


Job description

Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets. We are more than 34,000 people, in over 30 countries, dedicated to improving quality of life. Everyone has an important role to play.

With the power of many curious minds, together we can solve the world's most complex challenges and deliver more impact together. Role description: Our growing team in California is seeking an experienced Senior Process Mechanical Design Engineer to join our California Water Business. As part of this role, you will collaborate within a strong and supportive team environment to deliver innovative solutions for our clients.

Arcadis serves a variety of municipal and private sector clients in many market sectors. We combine technical expertise, a passion to serve, and a willingness to be adaptable in every project to serve our clients. You will bring your expertise to a variety of project types ranging from large municipal water/wastewater treatment facility upgrades projects to local system upgrades and feasibility studies.

This role sits within our global Resilience global business area. Role accountabilities: As a Senior Process Mechanical Design Engineer specializing in water and wastewater projects, you will play a pivotal role in leading innovative mechanical design and process integration for cutting-edge treatment facilities, reservoirs, and pumping or lift stations. You will drive the development of comprehensive construction documents and detailed specifications for critical systems, including pumps, valves, gates, and other mechanical components.

Your expertise will be central to establishing the basis of design, completing in-depth calculations, and delivering robust solutions tailored to each project's unique challenges. You'll perform thorough assessments, meticulously size and select equipment, develop and evaluate design options with accurate cost estimates, and prepare technical memoranda to clearly document your rationale and recommendations. By leading seamless coordination among various engineering disciplines, you'll ensure every project benefits from a fully integrated design approach.

You'll develop process flow narratives, conduct hydraulic analyses, and play an active role in project management activities such as budget and schedule tracking. Beyond engineering, you'll support business development efforts, contribute to compelling proposals, and inspire the next generation by mentoring junior engineers and ensuring rigorous quality control reviews. This is an opportunity to make a lasting impact on vital water infrastructure projects while advancing your career in a collaborative, forward-thinking environment.

Key Skills and Attributes: Proficient in mechanical design standards and experience in design bid-build or alternative delivery projects. Strong working knowledge of CAD and BIM and be proficient with Microsoft Office (Word, Excel, PowerPoint) and interpersonal, verbal, and written communication skills, strong work ethic and ability to multi-task, prioritize, and take direction. Qualifications & experience: Required Qualifications B.S

in Civil or Mechanical Engineering (or related field) 8 years of relevant experience in process mechanical engineering for water and wastewater facilities. Licensed Professional Engineer (P.E.) in the state of California. Preferred Qualifications: Mechanical or Civil P.E

preferred. 12+ years of relevant experience in process mechanical engineering for water and wastewater facilities. Why Arcadis.

We can only achieve our goals when everyone is empowered to be their best. We believe everyone's contribution matters. It's why we are pioneering a skills-based approach, where you can harness your unique experience and expertise to carve your career path and maximize the impact we can make together.

You'll do meaningful work, and no matter what role, you'll be helping to deliver sustainable solutions for a more prosperous planet. Make your mark, on your career, your colleagues, your clients, your life and the world around you. Together, we can create a lasting legacy.

Join Arcadis. Create a Legacy. Our Commitment to Equality, Diversity, Inclusion & Belonging We want you to be able to bring your best self to work every day.

Our ambition is to be an employer of choice and provide a great place to work for all our people. We are an equal opportunity employer. We are dedicated to a policy of non-discrimination in employment on any basis including race, creed, color, religion, national origin, sex, age, disability, marital status, sexual orientation, gender identity, citizenship status, disability, veteran status, or any other basis prohibited by law.

Arcadis offers benefits for full time and part time positions. These benefits include medical, dental, and vision, EAP, 401K, STD, LTD, AD&D, life insurance, paid parental leave, reward & recognition program and optional benefits including wellbeing benefits, adoption assistance and tuition reimbursement. We offer nine paid holidays and 20 days PTO that accrue per year.

The salary range for this position is $121,651 - $194,304/year. Actual salaries will vary and are based on several factors, such as experience, education, budget, internal equity, project and location. #Resilience-ANA #Water-ANA #LI-CB2.


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About Arcadis

Sourced by ZipRecruiter

Our work with clients has a direct impact on people's lives and on the planet. We make moving, living and belonging in cities safer, more resilient and more sustainable. By partnering with our clients as responsible custodians of our earth's resources, we can create a sustainable planet. We continue to think of new ways to make positive impacts and create better experiences for people; data driven and digital solutions have become part of the Arcadis DNA. Working together with clients and using techniques like design thinking, we can get to the heart of our clients' most pressing challenges and work together to solve them.

Industry

Engineering professional services

Company size

10,000+ Employees

Headquarters location

Highlands Ranch, CO, US