Engine Aftertreatment Verification Intern

Global PACCAR Powertrain organization is seeking a motivated Engine Aftertreatment Verification Intern to support testing, verification, and system integration activities for PACCAR’s advanced engine aftertreatment systems.

What to Expect

• In-person internships, 40 hours a week, minimum of 12 weeks

• Location: Mount Vernon, WA

• Start Dates: May 18, 2026 or June 22, 2026

• Visa Sponsorship: Not available for this position (H-1B, TN, OPT, etc.)

About PACCAR

PACCAR Inc, founded in 1905, is a Fortune 500 global technology leader in the design, manufacture, and customer support of premium light-, medium-, and heavy-duty trucks under the Kenworth, Peterbilt, and DAF brands. PACCAR also provides advanced diesel engines, financial services, information technology, and aftermarket support that power its global operations.

Your next career move starts here—whether you’re passionate about transportation technology, engineering innovation, or supporting a world-class organization. Join the PACCAR team and help shape the future of commercial vehicle solutions.

About Global PACCAR Powertrain

Global PACCAR Powertrain designs and develops integrated, high‑efficiency engines, automated transmissions, and axle systems for Kenworth, Peterbilt, and DAF trucks—supported by essential functions such as testing, validation, and aftersales service. Through advanced engineering, vertically integrated manufacturing, and robust aftermarket support, the organization delivers powertrain solutions optimized for performance, durability, fuel efficiency, and sustainability. Our portfolio includes PACCAR’s MX‑13 and MX‑11 engines, TX‑12 and TX‑18 automated transmissions, and advanced axle technologies—engineered to operate as a fully integrated system that enhances drivability, reduces lifecycle cost, and ensures consistent reliability across PACCAR’s global brands.

As part of this team, you will collaborate with a global, cross‑functional group focused on delivering innovative engineering solutions that maximize customer uptime and drive operational excellence.

Job Responsibilities

• Collaborate with industry professionals on diesel engine aftertreatment verification and integration projects.

• Execute testing in vehicles and engine test cells to validate aftertreatment system performance.

• Analyze test data, refine analysis tools, and draw meaningful technical conclusions.

• Support continuous improvement efforts through test procedure enhancements and documentation updates.

• Provide recommendations based on test findings to drive next-step decisions.