Senior System Performance Verification Engineer PACCAR flexible benefit account, paid holidays, sick time, tuition reimbursement, 401(k) United States, Washington, Mount Vernon Aug 28, 2026 PACCAR Global Powertrain organization is seeking a motivated Senior System Performance Verification Engineer to support integration, verification, and optimization of aftertreatment thermal management including 48V electric systems. The engineer will work closely with calibration, controls, electrical, mechanical, and vehicle engineering teams to deliver robust powertrain solutions and advanced engine aftertreatment systems that meet performance, durability, fuel economy, and emissions requirements. This position is located at PACCAR Technical Center, Mount Vernon, WA. Job Responsibilities Develop and execute validation plans at component, subsystem, powertrain, and vehicle levels to identify system integration issues
Define and execute testing activities to support engine aftertreatment development in the test cell environment to evaluate fuel economy improvements, system efficiency, thermal performance and emissions
Collaboration with Engine Integration, OBD calibration and Vehicle Integration teams to successfully integrate aftertreatment functions
Recommend, develop, and execute continuous process improvement to improve product quality, reliability, and durability of the PACCAR engine aftertreatment system
Stay aware of new and upcoming aftertreatment technologies and testing methods
Complete reports and presentations to communicate findings, draw conclusions and give recommendations on next steps
Mentor and help develop less experienced engineers
Maintain positive working relationship with other groups at the PACCAR Technical Center and other PACCAR divisions
Qualifications & Skills 5+ years of relevant engineering work experience in the automotive industry
B.S. in Electrical, Computer, Mechanical, Engineering or related discipline (MS preferred)
Strong understanding of internal combustion engine operation and powertrain systems
Understanding of modern vehicle architectures and trade offs
Familiarity with CAN communication protocols and vehicle networks
Experience working with OEMs, Tier-1 suppliers, or powertrain development organizations
Understanding of heavy-duty diesel emissions regulatory requirements including diagnostics
Understanding of current diesel exhaust aftertreatment technology (DOC, DPF, SCR & DEF)
Knowledge of engine control system strategies and how they pertain to diesel engine and aftertreatment systems
Scripting and data analysis experience desired
Experience with engine test cell/vehicle data collection, analysis and test planning is preferred
Proficient with engine calibration, data collection tools (ATI Vision/Vector Canape, Cummins Calterm/ETAS INCA & Vector CANalyzer) and engine control systems
Must be self-directed; possess excellent analysis, communication, and presentation skills; must be organized and take a rigorous approach to engineering projects
Ability to work well independently and as part of a team
Must be able to manage personal workload and have the willingness, flexibility, and initiative to respond to shifting time and project demands
Ability to travel up to 15%, including international travel
About PACCAR PACCAR, Inc. is a Fortune 500 company established in 1905 and is recognized as a global leader in the commercial vehicle, financial, and customer service fields. PACCAR is a global technology leader in the design, manufacture, and customer support of high-quality light-, medium- and heavy-duty trucks. PACCAR Benefits 401k with up to a 5% company match
Fully funded pension plan that provides monthly benefits after retirement
Comprehensive PTO - minimum of 10 paid vacation days (additional days are provided with additional seniority/years of service), 12 paid holidays, and sick time
Tuition reimbursement for continued education
Medical, dental, and vision plans for you and your family
Flexible spending account (FSA) and health account (HSA)
Paid short-and-long-term disability programs
Life and accidental death and dismemberment insurance
EAP services include wellness plans, estate planning, financial counseling and more
Additional Job Board Information PACCAR is an Equal Opportunity Employer/Protected Veteran/Disability. At PACCAR, we value talent and promote growth and development. We carefully consider numerous compensation factors, including your education, training, or experience. Applicants and employees for this position will not be sponsored for work authorization, including, but not limited to H-1B visas, now or in the future. The salary range for the Senior System Performance Verification Engineer is $104,100 - $162,900 annually. Additionally, this role is eligible for a full range of benefit options listed above. This position is also eligible for a holiday gift. #LI-DT1