Top 339 Mechanical engineers Jobs in Laguna Hills, Ca

Mechanical Engineer — Product Development
Water Illumination INC —Lake Forest, CA
- $70,000 a year
- Full-time
- Mid-level
- Bachelor's degree
- US work authorization
- Health insurance
- Dental insurance
Quick Apply
1d
Mechanical Engineer
Chroma ATE, Inc. —Irvine, CA
- $90,000 - $130,000 a year
- Full-time
- Mid-level
- Analysis skills
- Travel
- Health savings account
- Health insurance
Quick Apply
2026 Early Career Mechanical Engineer
Anduril Industries —Costa Mesa, CA
- $100,000 - $110,000 a year
- Email
- Laboratory experience
- Master's degree
- Entry level
Mechanical Engineer
code-in-motion —San Clemente, CA
- Research
- Mid-level
- Organizational skills
Mechanical Engineer II - Automation
Prismatik —Irvine, CA
- $76,759.04 - $93,052.22 a year
- Full-time
- Engineering
- Mid-level
- Experience equivalent to degree accepted
8d
Mechanical Engineer
Bi-Search International inc. —Irvine, CA
- $70,000 - $75,000 a year
- Full-time
- Microsoft Outlook
- In-person
- Associate's degree
- Health insurance
- Dental insurance
Quick Apply
14d
Mechanical Engineer I (ECS) - Defense Systems Division
Parker Hannifin Corporation —Irvine, CA
- $70,890 - $117,300 a year
- Extended hours
- Microsoft Outlook
- Computer literacy
- Assembly
- Paid parental leave
- Paid holidays
12d
Entry Level Mechanical Engineer (Lake Forest, CA)
GMEP Engineers —Lake Forest, CA
- $28 - $32 an hour
- Full-time
- Office
- In-person
- Construction Management
- Health insurance
- Dental insurance
Quick Apply
8d
Entry-Level Mechanical Engineer
QED —Santa Ana, CA
- $75,000 a year
- Full-time
- Spanish
- No experience needed
- English
- Health insurance
- Dental insurance
Quick Apply
Mechanical Design Engineer
Adapt Automation —Santa Ana, CA
- Computer literacy
- Mid-level
Mechanical Engineer - Senior
JWC Environmental —Santa Ana, CA
- $110,000 - $130,000 a year
- Full-time
- Bachelor of Science
- English
- Master's degree
- Health savings account
- Health insurance
Quick Apply
Engineer II, Development
Mobis Parts America, LLC. —Fountain Valley, CA
- $57,898.31 - $85,978.99 a year
- Monday to Friday
- Engineering
- Mid-level
- Office
- Paid holidays
- Health insurance
Quick Apply
Contract Thermal Engineer
Advantest —Lake Forest, CA
- $71,792.56 - $100,000.00 a year
- Temporary
- Customer service
- Mid-level
- 3 years
Quick Apply
Mechanical Design Engineer - AI Trainer
DataAnnotation —Irvine, CA
- From $60 an hour
- Part-time
- Remote
- English
- Mid-level
- Bachelor's degree
Quick Apply
Mechanical Engineer - AI Trainer
DataAnnotation —Irvine, CA
- From $60 an hour
- Part-time
- Remote
- English
- Mid-level
- Bachelor's degree
Quick Apply
Junior Mechanical Engineer - AI Trainer
DataAnnotation —Costa Mesa, CA
- From $60 an hour
- Part-time
- Remote
- English
- Mid-level
- Bachelor's degree
Quick Apply
Mechanical/Mechatronics Engineer
Kelly Services —Irvine, CA
- $50 an hour
- Full-time
- Bachelor of Science
- Mid-level
- US work authorization
- Paid holidays
- Disability insurance
Quick Apply
8d
Thermal Test Engineer (Contract)
recruitAbility —Lake Forest, CA
- Contract
- 5 years
- Analysis skills
- In-person
Junior Mechanical Engineer - AI Trainer
DataAnnotation —Anaheim, CA
- From $60 an hour
- Part-time
- Remote
- English
- Mid-level
- Bachelor's degree
Quick Apply
Electromechanical Engineer II
Belcan —Irvine, CA
- $40 - $55 an hour
- Contract
- Bachelor of Science
- Mid-level
- 3 years
- Disability insurance
- Health insurance
Quick Apply

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Mechanical Engineer — Product Development

Water Illumination INC
Lake Forest, CA

Quick Apply

Job Details

Full-time
$70,000 a year
1 day ago

Benefits

Health insurance
Dental insurance
Paid time off
Vision insurance
Professional development assistance

Qualifications

Bachelor's degree in mechanical engineering
Teamwork
Mechanical Engineering
Mechanical drawings
Bachelor's degree
Design engineering
Fusion 360
Research & development
Mechanical troubleshooting

Full Job Description

Location: Lake Forest, California

Employment Type: Full-Time

Company: Water Illumination Inc.

About the Role

We are looking for a hands-on Mechanical Engineer to join an early-stage water treatment startup developing a new physical product from the ground up. This role will be deeply involved in the full product development process—from early concepts and prototypes through detailed mechanical design, fabrication, testing, iteration, and ultimately full-scale production.

This role is well suited for an engineer who enjoys building real hardware and solving practical engineering problems. You will work on mechanical systems and assemblies with a strong focus on fluid handling, structural design, material selection, machining, tolerances, sealing, assembly, serviceability, and manufacturability.

We are looking for someone with strong mechanical intuition who understands how design decisions translate from CAD to the machine shop and ultimately to reliable equipment in the field. You should be comfortable moving quickly between design, fabrication, assembly, troubleshooting, and testing, and using what you learn from hardware to improve the next design iteration.

Because we are an early-stage team, you will have significant ownership over mechanical architecture and design decisions. You will work closely with other engineers and company leadership, move quickly from ideas to physical prototypes, test your own designs, and directly influence the product as it evolves toward production and manufacturing scale-up.

Responsibilities

Design mechanical components, assemblies, and systems for a new water treatment product.
Design systems involving fluid handling, piping, pumps, valves, pressure vessels/housings, structural components, and related equipment.
Take designs from initial concept through CAD, prototyping, fabrication, assembly, testing, and iteration.
Develop detailed 3D CAD models, engineering drawings, and specifications for custom mechanical components and assemblies.
Apply appropriate fits, tolerances, and tolerance stack-up analysis to ensure reliable manufacturing and assembly.
Select materials, fasteners, seals, bearings, tubing, fittings, and other mechanical components based on performance and operating requirements.
Design for pressure, loading, vibration, corrosion, sealing, thermal effects, serviceability, and environmental conditions.
Design components with practical manufacturing processes in mind, including CNC machining, milling, turning, sheet metal, and other fabrication methods.
Work directly with machinists, fabrication shops, vendors, and suppliers to turn designs into physical hardware.
Build and evaluate prototypes, troubleshoot mechanical issues, and rapidly iterate based on testing and real-world performance.
Create and maintain engineering drawings, bills of materials, specifications, and other technical documentation.
Collaborate with electrical, controls, process, environmental, and manufacturing engineers as the product evolves.
Help transition successful prototypes into reliable, manufacturable, serviceable, and scalable products.

Qualifications

Bachelor’s degree in Mechanical Engineering.
Strong foundation in mechanical engineering fundamentals, including mechanics, materials, fluid systems, machine design, and manufacturing.
Experience designing and building physical products, machinery, equipment, or complex mechanical assemblies.
Strong proficiency with a modern 3D CAD platform such as SolidWorks, Fusion 360, Onshape, Inventor, Creo, or similar.
Experience creating manufacturing drawings and specifying dimensions, tolerances, fits, and critical design requirements.
Experience designing machined components with manufacturability and assembly in mind.
Experience taking mechanical designs through multiple rounds of prototyping, testing, and iteration.
Ability to independently troubleshoot mechanical problems, identify root causes, and develop practical solutions.
Comfortable working hands-on with prototypes, tools, components, and test equipment.
Strong communication and collaboration skills, including working effectively with engineers, machinists, technicians, vendors, and suppliers.
Comfortable discussing, defending, and improving designs through technical review and team feedback.

Preferred Experience

Experience working in a startup, R&D, product development, or other fast-moving engineering environment.
Direct experience working with machine shops and collaborating closely with machinists.
Hands-on machining experience with manual mills, lathes, or CNC equipment.
Experience designing fluid-handling systems involving pumps, valves, piping, tubing, filtration, membranes, seals, or pressure-containing components.
Experience in water treatment, wastewater treatment, industrial equipment, process equipment, chemical processing, or adjacent industries.
Experience selecting materials and designing components for wet, corrosive, chemically aggressive, or high-pressure environments.
Experience sourcing custom components, working with fabrication vendors, and evaluating manufacturing methods and quotations.
Experience developing test fixtures, conducting mechanical testing, and using test results to drive design improvements.
Experience building, commissioning, or field-testing prototype systems in real-world operating environments
3+ years of relevant mechanical design or product development experience

What We’re Looking For

More than anything, we are looking for a strong mechanical problem solver and builder—someone who can look at a mechanical system, understand how the components interact, anticipate likely failure modes, and develop practical, robust solutions.

This role is a good fit for an engineer who enjoys working between the CAD workstation, the machine shop, and the prototype bench. You should care not only about whether a design works on screen, but whether it can be fabricated, assembled, sealed, tested, serviced, and operated reliably in the real world.

We value strong engineering fundamentals, mechanical judgment, and the ability to learn quickly from hardware. You should be comfortable diagnosing problems, making design tradeoffs, and iterating based on test results and hands-on experience.

You do not need to come from the water treatment industry specifically. Experience developing complex physical products, machinery, industrial equipment, robotics, aerospace hardware, automotive systems, energy equipment, or other electromechanical or fluid-handling systems can translate well to this role.

Why Join Us

You will have the opportunity to help define a new water treatment product at a very early stage and have direct influence over how the system is designed and built. Rather than maintaining an existing product, you will be helping create the mechanical architecture, prototypes, and engineering practices that become the foundation of the product as the company grows.

Pay: $70,000.00 per year

Benefits:

Dental insurance
Health insurance
Paid time off
Professional development assistance
Vision insurance

Education:

Bachelor's (Required)

Ability to Commute:

Lake Forest, CA 92630 (Required)

Ability to Relocate:

Lake Forest, CA 92630: Relocate before starting work (Required)

Work Location: In person

Quick Apply

Refine Your Search

mechanical engineers jobs in laguna hills, ca

Mechanical Engineer — Product Development

Mechanical Engineer

2026 Early Career Mechanical Engineer

Mechanical Engineer

Mechanical Engineer II - Automation

Mechanical Engineer

Mechanical Engineer I (ECS) - Defense Systems Division

Entry Level Mechanical Engineer (Lake Forest, CA)

Entry-Level Mechanical Engineer

Mechanical Design Engineer

Mechanical Engineer - Senior

Engineer II, Development

Contract Thermal Engineer

Mechanical Design Engineer - AI Trainer

Mechanical Engineer - AI Trainer

Junior Mechanical Engineer - AI Trainer

Mechanical/Mechatronics Engineer

Thermal Test Engineer (Contract)

Junior Mechanical Engineer - AI Trainer

Electromechanical Engineer II

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