{"id":3087232,"url":"https://alion.io/job/s-i-systems-senior-linux-engineer-ssh-key-management-security","title":"Senior Linux Engineer – SSH Key Management & Security","company":{"id":3865830,"name":"S.i. Systems","domain":"sisystems.com","url":"https://alion.io/company/sisystems-2","size_band":"1001-5000","is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"ADP","truth_index":null},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":"contractor","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Toronto, Canada"],"countries":["CA"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":61000,"max_usd":114000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":87},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Linux","optional":false},{"name":"OpenSSH","optional":false},{"name":"Unix","optional":false},{"name":"Ansible","optional":true},{"name":"PKI","optional":true},{"name":"Zero Trust","optional":true}],"status":"live","first_seen_at":"2026-10-21T06:40:01Z","employer_posted_date":null,"last_verified_at":"2026-10-21T06:40:01Z","board_verified":false,"closed_at":null,"days_open":13,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":13},"description":"Contract Duration: Through December 2027, with potential extension\nTarget Start: November 2026 preferred; project kickoff January 2027\nWork Arrangement: Hybrid - North Mississauga or South Brampton, approximately 2-4 days onsite per week\n\nPosition Overview:\nOur retail client is looking for an experienced linux Security Engineer to support the implementation of an enterprise SSH key-management solution.\n\nThe organization has completed initial proof-of-concept work and is preparing to roll out the solution across its Linux & Unix environments. The project will involve defining technical requirements, developing deployment approaches and implementing the solution in phases.\n\nThe successful candidate will bring strong hands-on Linux and Unix and SSH security experience, working closely with infrastructure, SRE, network, security and change-management teams to support the implementation.\n\nThis is a hands-on technical delivery role requiring someone who understands SSH key management, can work through complex implementation challenges and help ensure secure, scalable deployments across enterprise environments.\n\nRequired Skills & Experience\nStrong hands-on experience administering, configuring and troubleshooting enterprise Linux and Unix environments and OpenSSH.\nDeep understanding of SSH authentication, public-private keys, authorized keys, trust relationships, SSH configurations and key lifecycle management.\nExperience implementing or supporting SSH security, SSH key management or access-management solutions in enterprise environments.\nExperience translating technical requirements and solution designs into deployment patterns, implementation procedures and production-ready solutions.\nStrong understanding of Linux-Unix security configurations, authentication mechanisms and technical dependencies across different operating systems.\nExperience supporting large-scale infrastructure or security implementations, including phased deployments, testing, troubleshooting, change management and rollback planning.\nAbility to assess technical approaches, identify implementation risks and recommend secure, scalable solutions.\nStrong communication skills and experience working with infrastructure, SRE, network, security and external vendor teams.\n\nKey Responsibilities\nSupport the implementation and phased rollout of an enterprise SSH key-management solution across Linux-Unix environments.\nWork with internal technical teams and vendors to define solution requirements, deployment approaches and implementation plans.\nAssess existing Linux-Unix environments to understand SSH configurations, authentication methods, access patterns and technical dependencies.\nDevelop and validate deployment patterns across different Linux-Unix operating systems and OpenSSH versions.\nSupport SSH key discovery, inventory, lifecycle management and the implementation of security controls.\nWork with infrastructure and SRE teams to define automation requirements and support the deployment of SSH configurations and security controls at scale.\nCoordinate technical testing, troubleshooting, change management and rollback planning to support production deployments.\nIdentify technical risks, compatibility issues and implementation challenges, working with cross-functional teams to resolve them.\nDevelop technical documentation, implementation procedures, test plans and operational runbooks.\n\nNice to Have\nExperience with Ansible or equivalent infrastructure automation and configuration-management tools.\nExperience implementing enterprise SSH key-management platforms.\nKnowledge of SSH certificate-based authentication, PKI, machine identity and cryptographic key management.\nFamiliarity with privileged access management and Zero Trust security concepts.\nExperience supporting large-scale Linux-Unix security modernization initiatives.\nDisclaimer:\nAI may be used in evaluating candidates.\nThis posting is for an existing vacancy.","description_format":"text","description_chars":3939,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-22T13:46:40Z"}],"visa":[],"liveness":{"score":54,"band":"ok","label":"Likely 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