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Intern Jobs in Montclair, CA

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Administrative Intern Orange County Yes Usa

Irvine, California

You will assist with the daily operations of our intense but incredibly rewarding program, counsel, and supervise international teenagers and young adults by supporting the academic team, the excursion team, and our clients (students and chaperones). Excursion/Activity Support: Confirm existing bookings or assist in placing new orders to book tickets to excursion sites.

30+ days ago

Mechanical Engineering Intern Fortive Corporation

Irvine, CA

$20–$40 / hour

We're a force for progress, working alongside our customers and partners to solve challenges on a global scale, from workplace safety in the most demanding conditions to advanced technologies that help providers focus on exceptional patient care. Interns gain hands-on experience, build professional skills, and develop an understanding of ASP’s products, culture, and the Fortive Business System (FBS), our proven approach to continuous improvement and growth.

Today

Electrical Engineering Intern Summer 2027 Rocket Lab Corp

Pasadena, CA

Important information: FOR CANDIDATES SEEKING TO WORK IN US OFFICES ONLY: To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR), Rocket Lab Employees must be a U.S. citizen, lawful U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum, or be eligible to obtain the required authorizations from the U.S. Department of State and/or the U.S. Department of Commerce, as applicable. As an Electrical Engineering Intern based at Rocket Lab's site in Pasadena, California, you will have the opportunity to support the team by assisting with hardware bring-up, laboratory testing, prototype assembly, embedded firmware validation, data collection and analysis, and troubleshooting of motor control systems.

30+ days ago

Systems Engineering Intern Summer 2027 Rocket Lab Corp

Pasadena, CA

As a Systems Engineering Intern based at Rocket Lab's site in Pasadena, California, you will have the opportunity to support hands-on integration and testing which includes setting up test hardware, operating robotic systems, executing test procedures, collecting and analyzing data, troubleshooting issues, documenting results, and helping prepare verification and customer deliverable This Systems Engineering team supports the development, integration, and verification of robotic and motion-control systems for active customer programs. Important information: FOR CANDIDATES SEEKING TO WORK IN US OFFICES ONLY: To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR), Rocket Lab Employees must be a U.S. citizen, lawful U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum, or be eligible to obtain the required authorizations from the U.S. Department of State and/or the U.S. Department of Commerce, as applicable.

30+ days ago

civilstructural-engineering-intern-transmission-distribution-transmission-brea Burns & McDonnell

Brea, CA

$19.50–$37 / hour

The Transmission & Distribution group is responsible for the planning and design of electrical transmission projects in power delivery, including overhead transmission, underground transmission, distribution systems, substation design, telecommunication & network engineering, pipelines, renewable power integration, security, grid modernization and more. Pursuit of a bachelor's degree in Civil Engineering, Structural Engineering or a related field from a recognized, accredited program required.

30+ days ago

Engineering Intern TS Conductor Corp

Huntington Beach, CA

Basic understanding of total quality management systems and tools, such as systematic problem-solving, root cause analysis, process design, demand flow, bills of material structure, process plans, routings, and Value Stream Mapping. The intern will help implement operating procedures and improvement projects that support production, safety, quality, throughput, productivity, first-pass yield, cost reduction, and on-time performance objectives.

24 days ago

Engineering Intern, EHS Howmet Aerospace

Brea, CA

$25–$28 / hour

We are seeking a highly motivated and energetic student to join our plant in Brea, CA as team as Engineering Intern focusing on Environmental Health and Safety initiatives. Preferred Qualifications: Currently enrolled in a Bachelor's degree program in Engineering (Mechanical, Aerospace, etc) from an accredited institution.

25 days ago

Rail Vehicle Engineering Intern - Summer 2027 AtkinsRealis Group Inc

Los Angeles, CA

$25–$31 / hour

As an Intern, you will participate in Explore, our intern development initiative, and will enjoy a host of benefits including: Competitive salary Hands-on experience with industry leaders Support and mentorship from various professionals throughout the business Career and educational exploration opportunities such as Client Site Visits, Weekly Lunch & Learns, & various virtual and/or in-person activities. Note to staffing and direct hire agencies: In the event a recruiter or agency who is not on our preferred supplier list submits a resume/candidate to anyone in the company, AtkinsRéalis family of companies, we explicitly reserve the right to recruit and hire the candidate(s) at our discretion and without any financial obligation to the recruiter or agency.

4 days ago

Civil Engineering Intern Kimley-Horn

Riverside, California

$30–$31 / 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. 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 19 years!

5 days ago

Manufacturing Engineering Intern (Summer 2027) ITT Inc. - English US

Irvine, California

$22.69–$33.85 / hour
Full time

Our leading brands include the iconic Goulds Pumps (with more than 175 years of history), Anhydro, APV, Bornemann, Bran+Luebbe, C’treat, Engineered Valves, Gerstenberg Schröder, Habonim, Johnson Pump, Lightnin, Philadelphia, Plenty, PRO Cast, Rheinhütte, Seital Separation, Stelzer, Svanehøj, Tigerholm, Uutechnic, VIDAR, Waukesha Cherry-Burrell. Through operational execution, innovation, and disciplined capital deployment, including strategic acquisitions such as SPX FLOW, ITT partners with its customers to deliver enduring solutions to the key industries that underpin our modern way of life.

17 days ago

Flight Software Engineering Intern (Simulation/Hardware-In-The-Loop) - Spring & Summer 2027 Hermeus Corp

Los Angeles, CA

$25–$33 / hour

Currently pursuing a graduate degree (MS or PhD) in Electrical Engineering, Computer Engineering, Computer Science, Software Engineering, Aerospace Engineering, or a related technical field. Required Qualifications: Currently pursuing a degree in Electrical Engineering, Computer Engineering, Computer Science, Software Engineering, Aerospace Engineering, or a related field.

19 days ago

electrical-engineering-intern-transmission-distribution-network-integration-automation-brea Burns & McDonnell

Brea, CA

$21.50–$41 / hour

The Transmission & Distribution group is responsible for the planning and design of electrical transmission projects in power delivery, including overhead transmission, underground transmission, distribution systems, substation design, telecommunication & network engineering, pipelines, renewable power integration, security, grid modernization and more. Basic knowledge and experience in Microsoft Office programs, including, Word, Excel, PowerPoint and Outlook.

30+ days ago

Robotics Engineering Intern: Systems & Applications GrayMatter Robotics

Los Angeles, CA

In order to comply with the export regulations of the United States Government, it is required that the applicant must fall under one of the following categories: (i) U.S. citizen or national, (ii) U.S. lawful permanent resident (i.e. current green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158. Work on our Government Projects team with other cross-functional teams on designing, implementing, and testing systems associated with robotic grinding applications.

30+ days ago

Civil Engineering Intern Mead & Hunt

Ontario, California

$19–$25 / hour

If you have strong communication and organizational skills, are self-motivated, and can work well both independently and as part of a team, complete the online application process for this job posting at www.meadhunt.com/careers . From architecture, aviation, food/beverage processing, and federal to transportation, water infrastructure and more, our unique methodologies deliver innovative, cost-effective solutions that elevate clients and communities.

30+ days ago

electrical-engineering-intern-transmission-distribution-substation-brea Burns & McDonnell

Brea, CA

$21.50–$41 / hour

The Transmission & Distribution group is responsible for the planning and design of electrical transmission projects in power delivery, including overhead transmission, underground transmission, distribution systems, substation design, telecommunication & network engineering, pipelines, renewable power integration, security, grid modernization and more. Basic knowledge and experience in Microsoft Office programs, including, Word, Excel, PowerPoint and Outlook.

30+ days ago

Water Engineering Intern - Summer 2027 AtkinsRealis Group Inc

Costa Mesa, CA

$25–$31 / hour

6 days ago

mechanical-engineering-intern-global-facilities-brea Burns & McDonnell

Brea, CA

$20–$37 / hour

This includes work across diverse industries, including aerospace, space and defense, food and beverage, life sciences and technology, consumer products, healthcare and advanced manufacturing, guiding projects from site selection through startup. The Global Facilities group is responsible for the planning and design of manufacturing facilities, district energy systems, data centers and mission-critical facilities.

30+ days ago

Manufacturing Engineering Intern - Spring/Summer/Fall 2027 Hermeus Corp

Los Angeles, CA

$25–$33 / hour

About The Role: Hermeus is seeking talented students to join our Manufacture Engineering team in Los Angeles to support improvement initiatives to expand in-house manufacturing capabilities and contribute to the design, build, and testing of flight and critical ground support hardware. Hermeus is a venture-backed defense aviation company reclaiming the lost art of rapid iterative prototyping to build the fastest aircraft in the world today.

30+ days ago

Mechanical Engineering Intern - Spring/Summer 2027 Hermeus Corp

Los Angeles, CA

$25–$33 / hour

The team is responsible for the design and integration of hydraulic systems, fuel systems, propulsion, avionics and their supporting structural components for cutting-edge supersonic aircrafts. Hermeus is a venture-backed defense aviation company reclaiming the lost art of rapid iterative prototyping to build the fastest aircraft in the world today.

30+ days ago

fire-protection-engineering-intern-aviation-federal-brea Burns & McDonnell

Brea, CA

$20.50–$39 / hour

The Aviation & Federal group is responsible for program management, master planning, facility design commissioning, and operational systems design of commercial aviation and Federal & Military projects, including buildings, infrastructure, hangars, passenger terminals, fueling & ramp services, runways, and aviation support facilities. The final agreed upon compensation is based on a number of factors, including but not limited to: individual education, qualifications, prior work experience and work location.

30+ days ago

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Intern Jobs in Montclair, CA

Administrative Intern Orange County Yes Usa

Mechanical Engineering Intern Fortive Corporation

Electrical Engineering Intern Summer 2027 Rocket Lab Corp

Systems Engineering Intern Summer 2027 Rocket Lab Corp

civilstructural-engineering-intern-transmission-distribution-transmission-brea Burns & McDonnell

Engineering Intern TS Conductor Corp

Engineering Intern, EHS Howmet Aerospace

Rail Vehicle Engineering Intern - Summer 2027 AtkinsRealis Group Inc

Civil Engineering Intern Kimley-Horn

Manufacturing Engineering Intern (Summer 2027) ITT Inc. - English US

Flight Software Engineering Intern (Simulation/Hardware-In-The-Loop) - Spring & Summer 2027 Hermeus Corp

electrical-engineering-intern-transmission-distribution-network-integration-automation-brea Burns & McDonnell

Robotics Engineering Intern: Systems & Applications GrayMatter Robotics

Civil Engineering Intern Mead & Hunt

electrical-engineering-intern-transmission-distribution-substation-brea Burns & McDonnell

Water Engineering Intern - Summer 2027 AtkinsRealis Group Inc

mechanical-engineering-intern-global-facilities-brea Burns & McDonnell

Manufacturing Engineering Intern - Spring/Summer/Fall 2027 Hermeus Corp

Mechanical Engineering Intern - Spring/Summer 2027 Hermeus Corp

fire-protection-engineering-intern-aviation-federal-brea Burns & McDonnell

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