{"id":1013601,"url":"https://alion.io/job/nextgen-federal-systems-simulation-engineer","title":"Simulation Engineer","company":{"id":7117,"name":"NextGen Federal Systems","domain":"nextgenfs.com","url":"https://alion.io/company/nextgenfs","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"A","score":86,"open_postings":16,"ghost_share":0,"stale_share":0.563,"repost_share":0,"time_to_fill_p50_days":54,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Colorado Springs, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":87000,"max_usd":164000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":5578},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-09-17T18:22:23Z","employer_posted_date":"2026-09-17","last_verified_at":"2026-10-16T10:01:24Z","board_verified":true,"closed_at":null,"days_open":28,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":28},"description":"NextGen is seeking an experienced AFSIM Scenario Developer to support North American Aerospace Defense Command (N&NC) mission areas through advanced modeling, simulation, analysis, and scenario development. The ideal candidate will be highly proficient in the AFSIM environment and capable of building high-fidelity operational scenarios that support planning, experimentation, and wargaming activities.\nResponsibilities\n· Build scenarios in the AFSIM software environment that accurately represent N&NC interests and mission areas.\n· Support development of Concept Plan (CONPLAN) materials, Table-Top Exercises (TTX), wargames, and select experimentation projects using AFSIM-based modeling and simulation (M&S) products.\n· Align all scenarios with core mission areas, including representations of Golden Dome and Border missions.\n· Develop realistic representations of space, air, land, and sea platforms, including sensors, communication links, and behavior models.\n· Implement Behavior and Agent Modeling (BAM) techniques and utilize Monte Carlo methods for scenario execution.\n· Save scenarios, platforms, and related objects in a data repository to ensure standardization and future reuse.\n· Develop interfaces for import/export between AFSIM and other software entities\n· Document interface designs and produce user instructions.\n· Run AFSIM simulations in support of N&NC analysis tasks and overall M&S efforts.\n· Build and execute AFSIM scenarios for CONPLAN development, TTXs, wargames, and experimentation projects as tasked.\n· Prepare and deliver data outputs, written reports, and briefing products as required by the Government.\nQualifications\n· BS or equivalent in Computer Science, Engineering, Mathematics, or equivalent technical degree\n· 5+ years’ prior work experience in the aerospace or defense industry, with demonstrated AFSIM experience\n· Must have an active Top-Secret SCI (TS/SCI) security clearance\n· Demonstrated proficiency and experience in the AFSIM development environment.\n· Strong understanding of military operations across space, air, land, and maritime domains.\n· Experience developing behavior models, agent-based simulations, or Monte Carlo 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