Internships in Plainfield, New Jersey, United States

38 jobs available

Discover Internships opportunities in Plainfield, New Jersey, United States. Find your perfect role from leading companies across the region.

Showing 20 of 38 jobs

A

Lab Engineer (Intern)

ANS

South Plainfield,NJ,USA Internship On-site USD18 - USD22 / hour

Geotechnical Lab at ANS supports the company's soil testing initiatives. The Lab Engineer Intern prepares soil and rock samples, conducts ASTM/AASHTO tests, records data, and maintains equipment in a hands‑on lab environment.

Last seen Jul 24, 2026
View details Apply
A

AI/ML App Development Engineer Intern

Advantest

South Plainfield, New Jersey, United States Internship On-site

Advantest America Inc., a leading semiconductor test and measurement company, invites a self‑driven intern to join the ACS US (Advantest Cloud Solutions) team. The role focuses on AI/ML application development within containerized production environments, leveraging cloud, AI, and data analytics to integrate test and measurement solutions across the semiconductor value chain.

Last seen Jul 21, 2026
View details Apply
F

Corporate Internship Program - Project Management (Berkeley Heights, NJ)

Fiserv

Berkeley Heights, New Jersey, United States of America Internship On-site USD45,900 - USD62,100 / year

Fiserv, a global fintech leader, invites students to join its Corporate Internship Program in Project Management. Interns will gain hands‑on experience in planning, executing, and monitoring business projects while collaborating with senior project managers and stakeholders.

Last seen Jul 22, 2026
View details Apply
H

2026 Internship: Integrated Business Planning (12 weeks, June 2026 start)

Haleon

Warren, NJ, United States of America Internship Hybrid USD24 - USD24 / hour

Join Haleon as an Integrated Business Planning Intern for a 12‑week summer program starting June 1, 2026. In this hybrid role based in Warren, NJ, you’ll support the IBP cycle across demand, supply, finance, marketing, and logistics, preparing data, updating templates, and assisting with pre‑reads and action logs.

Last seen Jul 22, 2026
View details Apply
B

Student CMO (Campus Marketing Officer – Marketing Intern)

Barnes & Noble Education

Union, NJ, USA Internship On-site

Kean University Bookstore’s Student CMO builds the campus brand through creative social media, events, and experiential marketing. The role designs Instagram, Facebook, and LinkedIn content, plans student‑focused campaigns, and supports author visits and giveaways to boost engagement.

Last seen Jul 24, 2026
View details Apply
N

Unpaid Intern

New Jersey Courts

Somerset/Hunterdon/Warren Vicinage, NJ, US Internship On-site

Unpaid Intern position with New Jersey Courts. Interns will perform clerical, administrative, and customer service tasks in court settings, including data entry, filing, photocopying, and support duties.

Last seen Jul 24, 2026
View details Apply
H

2026 Intern: Supply Chain Operations (June Start, 12 weeks)

Haleon

Warren, NJ, United States Internship Hybrid USD24 - USD24 / hour

Network Operations at Haleon seeks a Summer Intern to build a standardized Cost of Goods methodology across global manufacturing sites. The role involves data analysis, documentation, and cross‑site collaboration to drive consistency and efficiency.

Last seen Jul 22, 2026
View details Apply
H

2026 MBA Internship: US Marketing

Haleon

Warren, New Jersey, United States Internship On-site USD46 - USD46 / hour

Welcome to Haleon. We’re a purpose-driven, world-class consumer company putting everyday health in the hands of millions. In just three years since our launch, we’ve grown, evolved and are now entering an exciting new chapter – one filled with bold ambitions and enormous opportunity.

Last seen Jul 22, 2026
View details Apply
H

Intern

Highmark Health and Allegheny Health Network

NJ, Working at Home - New Jersey Internship Remote

Allegheny Health Network’s Intern Program supports day‑to‑day operations by engaging in projects, research, and reporting to improve unit performance. Interns collaborate with colleagues and clients, receive mentorship, and contribute to planning and implementation of initiatives across the organization.

Last seen Jul 22, 2026
View details Apply
M

2026 Future Talent Program – Global Regulatory Affairs - Oncology - Co-op

Merck

Rahway, New Jersey, USA Internship Hybrid USD39,600 - USD105,500 / year

The Future Talent Program offers a 6‑month Co‑op in Global Regulatory Affairs – Oncology at Merck. Students in life sciences, medicine, pharmacology or related fields will gain insight into drug development and regulatory processes.

Last seen Jul 22, 2026
View details Apply
M

2026 Future Talent Program - Image Data Analytics Intern

Merck

Rahway, NJ, USA Internship Hybrid USD39,600 - USD105,500 / year

Internship focused on developing quantitative image analysis techniques to identify biomarkers for drug development using machine learning and deep learning.

Last seen Jul 22, 2026
View details Apply
M

2026 Future Talent Program - Finance MBA - Intern (Hybrid)

Merck

Rahway, New Jersey, United States Internship Hybrid USD39,600 - USD105,500 / year

Merck’s Finance department offers a 10‑week 2026 Future Talent Program – Finance MBA Intern (Hybrid) designed to develop future finance leaders. Interns gain hands‑on experience in forecasting, reporting, operating results analysis, operational risk management, process improvement consulting, capital structure and currency risk management, business strategy and capital investment analysis, and cross‑functional finance functions.

Last seen Jul 22, 2026
View details Apply
M

2026 Future Talent Program - Discovery Chemistry Modeling & Informatics - Intern

Merck

Rahway, NJ, USA Internship On-site USD39,600 - USD105,500 / year

Merck’s 2026 Future Talent Program offers a 10‑12 week paid internship in Discovery Chemistry Modeling & Informatics across five U.S. labs. Candidates pursue a BS/BA or Master’s/Ph.D. in chemistry, biochemistry, biophysics, informatics, computer science, or applied mathematics and must have strong academic performance.

Last seen Jul 22, 2026
View details Apply
M

2026 Future Talent Program - Global Supplier Management Group Direct Material Procurement - Co-op

Merck

Rahway, New Jersey, United States Internship Hybrid USD39,600 - USD105,500 / year

Co-op program in Global Supplier Management Group. Supports strategic procurement, market intelligence, cost modeling, risk assessment, and supplier performance.

Last seen Jul 22, 2026
View details Apply
G

IT Support Intern

GenScript/ProBio

Piscataway,NJ,United States Internship On-site USD22 - USD23 / hour

IT Operations at GenScript/ProBio supports enterprise IT services for the Piscataway campus. The IT Support Intern provides on‑site technical assistance, troubleshoots hardware, software and network issues, and assists with inventory and documentation while learning IT service management processes.

Last seen Jul 24, 2026
View details Apply
M

2026 Future Talent Program - Corporate Transactions Summer - Intern

Merck

Rahway, New Jersey, USA Internship Hybrid USD39,600 - USD105,500 / year

The Future Talent Program offers up to 12‑week internships in Merck’s Corporate Transactions Legal Team. Interns, current 1L law students, will work on agreements for asset and product acquisitions, employee benefits, procurement, real‑estate, and corporate transactions across divisions.

Last seen Jul 22, 2026
View details Apply
M

2026 Future Talent Program – Global Safety Environment – Intern

Merck

Rahway, New Jersey, United States Internship Hybrid USD39,600 - USD105,500 / year

The Global Safety & Environment Intern will provide EHS compliance and technical support to local site business partners on programs such as General Occupational Safety, High‑Risk Work, Industrial Hygiene, and Air/Water/Waste Environmental initiatives. This internship lasts up to 12 weeks and is part of Merck’s Global Support Functions Division.

Last seen Jul 22, 2026
View details Apply
E

Summer Internship Program 2026

Eos Energy Storage

Edison, NJ, United States of America Internship On-site

Eos Energy Storage is offering a Summer 2026 Internship Program across three U.S. locations—Edison, NJ; East Pittsburgh, PA; and Turtle Creek, PA. The program spans 10 weeks, fully onsite, paid, and focuses on hands‑on projects in corporate functions, operations, and science & technology. Interns will work on business problem solving, data analysis, and efficiency maximization, with opportunities to network with industry leaders and present final projects in August.

Last seen Jul 22, 2026
View details Apply
C

Cyber Security Intern- Summer 2026

C&S Wholesale Grocers

Edison, NJ Internship Hybrid

Internship at C&S Wholesale Grocers offering hands-on experience in cyber security. Work on real projects involving SSO, MFA, Active Directory, and security tools.

Last seen Jul 22, 2026
View details Apply
N

Alterations & Tailor Shop - Apprentice - The Mall at Short Hills

Nordstrom

Short Hills, NJ, United States of America Internship On-site USD18 - USD30 / hour

Nordstrom’s Alterations & Tailor Shop Apprentice program offers hands‑on training for aspiring tailors. Apprentices learn sewing techniques, garment alterations, and quality standards while working alongside experienced tailors.

Last seen Jul 22, 2026
View details Apply

Internships in Plainfield: FAQ

How many Internships in Plainfield are open right now?

38 Internships in Plainfield are live on NextGig, all seen active within the last 45 days. The list refreshes daily as new roles are posted and filled ones drop off.

Which companies are hiring for Internships in Plainfield?

Employers with current openings include ANS, Advantest, Fiserv, Haleon, Barnes & Noble Education, New Jersey Courts, and others. Every listing links straight to the employer's application page.

What do Internships in Plainfield pay?

14 of the 20 newest listings disclose pay, for example USD18 - USD22 / hour at ANS, USD45,900 - USD62,100 / year at Fiserv, USD24 - USD24 / hour at Haleon. Open a listing for the full compensation details.

Are any of these roles remote?

Of the 20 newest listings on this page, 1 is remote and 9 are hybrid. The work model is shown on each job card.