Diesel Calibrator

Job#: 3021604

Job Description:
If interested, please email your resume to Connor Stone ()

Job Summary

We are seeking a Diesel Calibration Engineer to support diesel engine aftertreatment development with a strong focus on DPF aftertreatment systems, engine dynamometer emissions testing, and regulatory certification activities. This role is hands-on and lab-focused, supporting lean, regeneration (regen), and OBD emissions processes, with daily responsibility for dyno testing, data collection, and analysis.

This position does not require full calibrator ownership, and is well-suited for a technologist, engineer, or technician-level professional with strong diesel development experience and familiarity with calibration and data acquisition tools.
Key Responsibilities
Aftertreatment & Calibration Support

• Support Diesel Particulate Filter (DPF) aftertreatment systems, including installation, testing, removal, and troubleshooting
• Execute aftertreatment calibration updates and monitor system response
• Track and document calibration changes, test results, and configuration updates
• Support diesel engine and aftertreatment calibration, test methods, and validation activities

Emissions & Dyno Testing

• Perform engine dynamometer certification emissions testing for:
  • Lean operation
  • Regeneration (active and passive)
  • On-Board Diagnostics (OBD)
• Maintain daily responsibility for engine dyno operation, test execution, and data quality
• Support EPA 10-65 certification protocols, including familiarity with key test cycles
• Assist with emissions certification readiness and documentation

Data Collection & Analysis

• Collect, analyze, and share dyno and emissions data across engineering teams
• Utilize ETAS calibration and data acquisition tools for:
  • Dyno data collection
  • Calibration tracking
  • Data sharing and reporting
• Ensure data integrity and traceability for certification and development activities

Cross-Functional Support

• Act as a technical "floater", supporting multiple programs or test activities as priorities shift
• Collaborate with calibration engineers, emissions teams, and regulatory compliance groups
• Support troubleshooting and root-cause analysis for aftertreatment or emissions issues

Required Qualifications

• Experience with diesel engine development, testing, or aftertreatment systems
• Hands-on experience with engine dynamometer testing
• Familiarity with DPF aftertreatment systems and diesel emissions processes
• Knowledge of lean, regen, and OBD emissions strategies
• Experience using ETAS tools (INCA, MDA, or similar) for calibration and data collection
• Understanding of EPA 10-65 emissions certification protocols and key drive cycles
• Strong attention to detail and documentation skills

Preferred Qualifications

• Bachelor's degree in Mechanical Engineering, Automotive Engineering, or related field (or equivalent hands-on experience)
• Prior experience supporting emissions certification testing
• Background in diesel aftertreatment calibration or validation
• Experience working in a regulated emissions or certification environment

EEO Employer

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at or .

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click for more details.

Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our 'Welcome Packet' as well, which an Apex team member can provide.