Linux Systems Engineer

Job Posting

Job#: 3013991

Linux Systems Engineer at Apex Systems

Location: 100% Remote

Length: 1‑year+ contract with potential to extend

Contact: Nicole – View email address on click.appcast.io

Job Description

A successful candidate will lead the design, implementation, and lifecycle management of mission‑critical OT platforms across Windows and Linux environments. This includes partnering with IT, cybersecurity, and operations teams to deliver secure, scalable, and automated infrastructure solutions. The role demands a strategic mindset and deep technical expertise in enterprise systems, identity security, and cloud integration, ensuring platforms are resilient, compliant, and aligned with industry best practices.

Key Responsibilities

• Design, implement, and maintain enterprise‑grade systems across Windows Server and Linux platforms, ensuring high availability, security, and compliance in OT environments.
• Architect and optimize Linux systems for performance and scalability, including advanced security hardening (SELinux, firewalls, SSH) and lifecycle management using automation tools (Ansible, Puppet).
• Lead identity integration across Active Directory and Linux directory services, ensuring seamless authentication and authorization.
• Develop and enforce IAM strategies, including IGA and PAM solutions, while collaborating with cybersecurity teams to implement zero‑trust principles.
• Drive automation of provisioning, configuration, and patching through advanced scripting (PowerShell, Bash, Python) and orchestration frameworks.
• Oversee software deployment and configuration management using SCCM, Intune, and Linux‑native tools.
• Integrate and secure hybrid cloud platforms (Azure, AWS), ensuring regulatory compliance and operational resilience.
• Troubleshoot complex system issues across Windows and Linux, including kernel, networking, and storage, and lead root‑cause analysis and remediation.
• Configure and maintain core Linux services (DNS, DHCP, NTP, syslog) and support containerization/orchestration initiatives (Docker, Kubernetes).
• Monitor and optimize system performance, implementing proactive measures for disaster recovery and business continuity.
• Produce and maintain architectural documentation, operational procedures, and governance frameworks.
• Act as a technical advisor in a Scaled Agile (SAFe) environment, influencing system roadmaps and enterprise architecture decisions.
• Mentor junior engineers and foster knowledge‑sharing across teams.

Required Qualifications

• Expertise in Linux system administration, including performance tuning and advanced troubleshooting.
• Strong knowledge of Linux security frameworks and compliance standards.
• Hands‑on experience with Linux automation and configuration management tools (e.g., Ansible, Puppet, Chef).
• Familiarity with Linux networking concepts and tools (iptables, netfilter, tcpdump).
• Extensive experience in enterprise systems engineering, with proven leadership in designing and managing large‑scale Windows and Linux environments.
• Advanced knowledge of Windows Server (2016/2019/2022) and Linux distributions (RHEL, Debian, Ubuntu).
• Deep understanding of Active Directory architecture and Linux identity management (LDAP, Kerberos, SSSD).
• Proficiency in IAM, IGA, and PAM technologies (e.g., SailPoint, CyberArk).
• Strong scripting and automation skills across PowerShell, Bash, and Python.
• Expertise in SCCM, Intune, and Linux‑native configuration management tools.
• Hands‑on experience with cloud platforms (Azure, AWS) and hybrid integration strategies.

Preferred Qualifications

• Proven track record of leading enterprise migrations and modernization initiatives.
• Experience implementing zero‑trust architectures and advanced security frameworks.
• Familiarity with containerization and orchestration (Docker, Kubernetes) in OT contexts.
• Knowledge of virtualization technologies (VMware, Hyper‑V) and disaster recovery planning.

Soft Skills

• Strategic thinker with strong problem‑solving and analytical capabilities.
• Exceptional communication and documentation skills for technical and executive audiences.
• Ability to lead cross‑functional teams and influence architectural decisions.
• Commitment to continuous learning and innovation.

Benefits Overview

Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401(k) program with company match after 12 months of tenure. Other benefits include an HSA (Health Savings Account), a SupportLinc Employee Assistance Program (EAP) with up to eight free counseling sessions, corporate discount savings program, and professional development opportunities such as on‑demand training, certification prep, and discounted association memberships.

Equal Opportunity Employer Statement

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at View email address on click.appcast.io or View phone number on click.appcast.io. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine‑Readable Files on behalf of Apex Systems.