{"id":1978421,"url":"https://alion.io/job/l3harris-technologies-lead-information-security-systems-engineer-isse","title":"Lead, Information Security Systems Engineer (ISSE)","company":{"id":177017,"name":"L3Harris Technologies","domain":"l3harris.com","url":"https://alion.io/company/l3harris-technologies","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SuccessFactors","truth_index":{"grade":"A","score":100,"open_postings":26,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":18,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Security","role_family":"Security","seniority":"lead","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Greenville, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":114000,"max_usd":237000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":398},"experience_years_min":13,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Cameo Systems Modeler","optional":false},{"name":"IBM DOORS","optional":false},{"name":"MBSE","optional":false},{"name":"Nessus","optional":false}],"status":"live","first_seen_at":"2026-10-06T22:14:31Z","employer_posted_date":"2026-10-06","last_verified_at":"2026-10-25T21:02:11Z","board_verified":true,"closed_at":null,"days_open":19,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":19},"description":"Job Title: Lead, Information Security Systems Engineer (ISSE)\nJob Code: 45429\nJob Location: Greenville, TX\nJob Schedule: 9/80 - Employees work 9 out of every 14 days - totaling 80 hours worked - and have every other Friday off\nJob Description:\nL3Harris Technologies is seeking an experienced Information Systems Security Engineer (ISSE) to join our Sensor Infrastructure team. The ideal candidate is a subject matter expert with comprehensive knowledge of information security principles and practices, bringing deep expertise in vulnerability scanning, compliance frameworks, secure system design and Authorization to Operate (ATO) documentation.\nEssential Functions:\n10% travel based on business needs.\nAuthor and review security requirements, ensuring alignment with applicable frameworks and policies.\nIdentify and implement significant improvements to security processes, systems, and controls.\nPrepare and deliver technical briefing materials for leadership and stakeholders.\nProvide input into new security products and processes with measurable impact on business and mission outcomes.\nLead system requirements management, decomposition, traceability, verification, and validation.\nDefine, analyze, allocate, and manage system, subsystem, and component requirements.\nEvaluate requirements flow-down, definition quality, and traceability.\nConduct trade studies across hardware, software, and system design alternatives.\nSupport hardware selection for mission systems, processing, networking, sensors, storage, and infrastructure.\nDevelop and review verification plans, test procedures, and test reports.\nResolve complex technical issues and support final platform trade-off decisions with Chief Engineers.\nWork closely with stakeholders inside of IT and within other business functions to enforce the organizational security strategy.\nTranslate complex technical issues into clear, actionable insights for stakeholders.\nContribute to security standards, architectural guidance and policy improvements.\nQualifications:\nActive US TS/SCI security clearance.\nDoD 8140.03 IASAE Level 2 certification.\nBachelor’s Degree and minimum 9 years of prior relevant experience.\nGraduate Degree and a minimum of 7 years of prior related experience.\nIn lieu of a degree, a minimum of 13 years of prior related experience.\nDemonstrated experience authoring and reviewing security requirements.\nDemonstrated experience improving security processes, systems, and controls.\nDemonstrated experience developing and reviewing verification plans, test procedures, and test reports.\nDemonstrated experience with vulnerability scanning tools (e.g., Nessus, Tenable, ACAS).\nDemonstrated experience working with ISR platforms, mission systems, sensors, payload integration, battle management command & control systems.\nDemonstrated experience with technical documentation, interface control, and requirement management tools.\nDemonstrated experience in performing trade studies and supporting technical decision-making for hardware and/or software selection.\nDemonstrated ability to communicate and influence security practices across organizational boundaries.\nPreferred Additional Skills\nProject management experience supporting large-scale, complex security initiatives\nKnowledge of radar, EO/IR, SIGINT, Communications or Networking\nExperience with 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