{"id":3875425,"url":"https://alion.io/job/diversified-services-network-aftertreatment-systems-development-engineer","title":"Aftertreatment Systems Development Engineer","company":{"id":4416159,"name":"Diversified Services Network","domain":"dsnworldwide.com","url":"https://alion.io/company/dsnworldwide","size_band":null,"is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":{"grade":"A","score":86,"open_postings":8,"ghost_share":0,"stale_share":0.75,"repost_share":0,"time_to_fill_p50_days":6,"computed_at":"2026-11-08T05:47:12Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Mossville, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-11-06T16:08:05Z","employer_posted_date":"2026-11-06","last_verified_at":"2026-11-08T20:40:05Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Aftertreatment Systems Development Engineer\nMossville, IL\nDiversified Services Network, Inc. (DSN) is seeking a full-time Aftertreatment Systems Development Engineer to join our team in Mossville, IL. We offer full benefits, PTO, 401k, and more! If you're looking to grow your career within an extremely reputable, stable Fortune 100 company - let's talk!\nPosition Overview\nThe Aftertreatment Systems Development Engineer advances the development and application of aftertreatment systems for diesel engine programs. This role combines catalyst simulation, system analysis, and validation testing to guide product development decisions.\n\nKey Responsibilities\nPerform catalyst performance modeling and sizing for aftertreatment applications\nEvaluate catalyst sizing alternatives and aftertreatment capability across a range of operating conditions\nAnalyze test-cell andfield data to assess aftertreatment performance\nCombine simulation results with experimental data to identify performance gaps and recommend technical solutions\nSupport catalyst and aftertreatment system selection, sizing, and application decisions\nCommunicate results and issues to team members, suppliers, and engine system development partners\nRequirements\nQualifications\nRequired\nBachelor's degree in Engineering, Materials Science, Chemistry, or a related field from an accredited program, and 2-4 years of engineering experience\nExperience with engine or aftertreatment testing\nKnowledge of catalyst technology\nBackground in product design and development\nStrong analytical thinking and problem-solving skills\nExcellent verbal and written communication skills, including the ability to convey technical information to team members, other departments, customers, and suppliers\nAbility to manage multiple priorities and adapt to changing demands\nQuick learner\nPreferred\nProficiency with data analysis tools\nExperience with engine and/or aftertreatment performance data reduction and analysis\nStrong understanding of engine and aftertreatment systems\nAbility to draw conclusions from analysis and make sound technical decisions\nExcellent interpersonal and collaboration skills\nSelf-starter with strong technical leadership skills\nBenefits\n401(k)\nDental insurance\nVision Insurance\nDisability insurance\nEmployee assistance program\nHealth insurance\nHealth savings account\nLife insurance\nPaid time off\nPaid Holidays\nPlease follow the link to our website for a list of job openings in Engineering, IT, Project Management, and more! 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