{"id":3616473,"url":"https://alion.io/job/respec-senior-scientific-software-engineer-fed-gov","title":"Senior Scientific Software Engineer (Fed Gov)","company":{"id":690693,"name":"RESPEC","domain":"respec.com","url":"https://alion.io/company/respec","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"B","score":78,"open_postings":32,"ghost_share":0,"stale_share":0.875,"repost_share":0,"time_to_fill_p50_days":27,"computed_at":"2026-11-04T06:34:25Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Albuquerque, United States"],"countries":["US"],"hiring_countries":["US"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ASME NQA-1","optional":false},{"name":"Bash","optional":false},{"name":"C++","optional":false},{"name":"Doxygen","optional":false},{"name":"Fortran","optional":false},{"name":"Git","optional":false},{"name":"HPC","optional":false},{"name":"Linux","optional":false},{"name":"MPI","optional":false},{"name":"Python","optional":false},{"name":"SLURM","optional":false},{"name":"Unix","optional":false},{"name":"Verification & Validation","optional":false},{"name":"C","optional":true}],"status":"live","first_seen_at":"2026-11-02T15:28:20Z","employer_posted_date":"2026-11-02","last_verified_at":"2026-11-04T11:27:53Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Big challenges need bold thinkers.\nIf you’re someone who sees problems as opportunities, you’ll thrive here. RESPEC is 100% employee-owned, which means we take ownership of every challenge. Here, your ideas drive real solutions. Since 1969, we’ve tackled complex challenges in energy transition, infrastructure resilience, digital transformation, and sustainability.\nAt RESPEC, you’ll work alongside clients to take on critical problems. Depending on your expertise, you might design infrastructure in remote locations, develop renewable energy solutions for global projects, or apply data-driven technology to improve mining and water systems.\nWe bring deep technical knowledge, real-world experience, and a commitment to work that matters. If you're looking for a place where your contributions have real impact, you’ll fit right in.\nWe do not accept unsolicited resumes from third-party recruiters.\n RESPEC is seeking a Senior Scientific Software Engineer to support scientific computing work for a large National Laboratory. You’ll help sustain and modernize computational modeling software used in a high-consequence environment, with a focus on reliable, maintainable code and performance on Linux and HPC systems.\nCore Responsibilities\nSustain, analyze, and modernize scientific software, including legacy systems.\nRefactor code to improve portability, efficiency, maintainability, and stability.\nSupport computational modeling across conceptual, process, and numerical models.\nDebug, profile, benchmark, and assess software performance and scalability.\nSupport Linux development, HPC workflows, and job-scheduler use.\nApply software quality practices, testing, and verification and validation.\nDocument source code, technical debt, risks, and software workflows.\nSupport reproducible builds, scientific data workflows, and migration readiness.\nPerform work in accordance with applicable Nuclear Quality Assurance (NQA-1) requirements.\n Required Technical Experience\nMaster’s degree in computer science, engineering, or a related discipline, such as environmental science, mathematics, or physics, and at least 5 years of relevant experience in computational modeling, software development, and documentation; or\nBachelor’s degree in a related discipline and at least 10 years of relevant experience.\nRecent project experience\nAt least one project within the 5 years preceding the response deadline involving both computational modeling and software development in a regulated, safety-critical, high-consequence, or equivalent mission-critical environment.\nAbility to describe the project’s environment, tasks, responsibilities, and deliverables, and explain why the work was high-consequence or mission-critical.\nTechnical skills\nScientific programming with Fortran, Python, and C and/or C++.\nGNU/Linux or equivalent development environments, including build, compilation, and debugging toolchains.\nHPC systems and job schedulers such as Slurm or equivalent.\nBash or equivalent Unix/Linux shell scripting.\nSoftware quality practices, testing, and scientific data formats and workflows.\nDebugging, profiling, performance analysis, and legacy-code modernization.\nGit or equivalent version control and reproducible builds.\nSource-code documentation tools such as Doxygen or equivalent.\nPython 2 and Python 3\nC and C++\nOpenMPI, MPICH, or Intel MPI\nSerial and parallel scientific codes\n Featured benefits:\nFlexible Work Schedules\nPaid Parental Leave\n401(k) & ESOP (with company match up to 4%)\nProfessional Development and Training\nTuition Reimbursement\nEmployee Assistance Program\nMedical/Dental/Vision Insurance Plans\nAll your information will be kept confidential according to EEO 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