{"id":2246508,"url":"https://alion.io/job/scytalys-senior-system-engineer","title":"Senior System Engineer","company":{"id":4382604,"name":"SCYTALYS","domain":"scytalys.com","url":"https://alion.io/company/scytalys","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Career site","truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Néo Psychikó, Greece"],"countries":["GR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":30000,"max_usd":67000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":6708},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Linux","optional":false},{"name":"Windows","optional":false}],"status":"live","first_seen_at":"2026-10-11T02:05:50Z","employer_posted_date":"2026-10-11","last_verified_at":"2026-10-12T19:08:33Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"EFA GROUP comprises companies in Aerospace, Security, Defense, and Industrial Cooperation with a solid international presence. EFA GROUP currently employs more than 400 people, the majority of whom are engineers and scientists. Headquartered in Greece, the Group maintains a strong international presence across Europe (Cyprus, Belgium, Switzerland, Estonia, and Germany), Asia (Singapore, Indonesia, and South Korea), the Middle East (UAE), and the United States, serving customers in 34 countries worldwide.\nThe GROUP includes EFA VENTURES (Supply Chain Management and integrated services), AEROSPACE VENTURES (Industrial Participation and related services), SCYTALYS (Systems Integration and Software), ES SYSTEMS (MEMs & IoT Integration), EPICOS (Global Defense B2B Information Platform), UCANDRONE (Unmanned Systems), AETHER AERONAUTICS (Target Drones), STHENOS AI (Intelligence Solutions), THYREOS CYBER (cyber security) , SUPERIOR AIR (aviation services and specialized aerial missions), SSMART (defense hardware - software production and services).\nSCYTALYS is a leading defense software development and systems integration company, founded in Greece in 1993. Serving customers in the Aerospace, Defense, and Security sectors, the company delivers advanced software solutions focused on interoperability, situational awareness, and mission effectiveness. Its expertise spans Tactical Data Links, Command & Control (C2/C4I) Systems, Training, Testing & Simulation, and Surveillance & Reconnaissance solutions.\nThe Role\nSCYTALYS is looking for a skilled and motivated Senior System Engineer to lead the design, integration, and lifecycle management of complex systems and systems-of-systems.\nKey Responsibilities\nAnalyze stakeholder needs and operational requirements to define system and subsystem requirements\nDevelop and maintain system architectures, including functional, logical, and physical views\nApply MBSE principles and manage system models, requirements, interfaces, and lifecycle traceability\nDefine and manage system interfaces and interface control documentation\nPlan and support integration, verification, validation, and acceptance activities\nReview system designs and implementation artifacts to ensure compliance with requirements and architectural objectives\nIdentify technical risks, trade-offs, and performance considerations, proposing mitigation strategies when required\nSupport system deployment, installation, and customer acceptance activities\nMentor and guide engineers in systems engineering methodologies, MBSE practices, and systems thinking\nCollaborate with multidisciplinary teams to ensure successful project execution and system delivery\nRequired Skills and Qualifications\n5+ years of experience in Systems Engineering\nBSc in Computer Science, Electrical/Electronics Engineering, Systems Engineering, or a related field\nExperience across multiple systems engineering disciplines, including Requirements Engineering, System Architecture & Design, MBSE, Integration Planning, and Verification & Validation\nProven experience defining technical specifications, decomposing requirements, and developing system architectures\nAdvanced knowledge of systems engineering methodologies, frameworks, and architectural principles\nExperience applying MBSE practices and working with SysML or similar modeling tools\nKnowledge of system interfaces and structured data formats such as XML and JSON\nUnderstanding of relational and non-relational databases\nFamiliarity with Windows and Linux environments from a system design and deployment perspective\nAdvanced knowledge of computer networking concepts and architectures\nWillingness to travel to customer sites when required\nFluency in English","description_format":"text","description_chars":3716,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-11T02:05:50Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring 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