Systems Administrator

Join a dynamic systems administration team supporting enterprise UNIX environments in a role focused on stability, automation, and continuous improvement. This onsite opportunity offers the chance to work with advanced AIX technologies, collaborate across technical teams, and contribute to a highly regulated environment that values precision, initiative, and strong operational excellence. Responsibilities

• Administer and support AIX and related UNIX operating system environments, ensuring reliability and performance.
• Manage operating system lifecycle activities, including installation, configuration, maintenance, and support of system components.
• Configure and maintain clustering, virtualization, and system administration tools across enterprise infrastructure.
• Automate routine tasks and configuration management using tools and scripting such as Ansible, Python, Aria, and UNIX shell scripting.
• Support Power Systems administration activities, including firmware upgrades, LPAR profiles, HMC tasks, and PowerVM-related operations.
• Perform AIX LVM administration, user and group management, and NIM-based OS installation and configuration.
• Maintain and troubleshoot networking and storage-related UNIX services, including VLANs, TCP/IP, vSwitches, SEAs, NFS, SFTP, SSH, SUDO, and LDAP client configuration.
• Monitor system performance, identify issues proactively, and help reduce operational toil through analytics and problem prevention.
• Work collaboratively within Agile environments and support both independent and team-based efforts to resolve issues efficiently.
• Follow the assigned schedule and support transition to alternate workdays as needed.

• 8+ years of professional experience in UNIX operating system technologies.
• Strong hands-on experience with AIX system administration.
• Deep knowledge of AIX LVM, LPAR profile creation, PowerVM administration, and AIX OS installation and configuration.
• Experience with NIM administration and automation.
• Familiarity with Power Systems firmware upgrades and HMC administration.
• Working knowledge of networking concepts and AIX/VIOS network administration.
• Experience with NFS, SUDO, LDAP client administration, SSH, and SFTP server/client support.
• Ability to troubleshoot performance, tuning, and operational issues in UNIX environments.
• Experience using automation and orchestration tools such as Ansible, Python, Aria, or UNIX scripting.
• Ability to work both independently and collaboratively while taking initiative to identify and resolve issues.

Preferred Skills

• Experience supporting networking and storage technologies in a financial services or similarly structured environment.
• Familiarity with Agile practices, including Scrum and Kanban.
• Exposure to analytics-driven or proactive operations support.
• Experience with system administration in highly secure or regulated environments.
• Comfort working onsite and supporting teams across multiple locations.

Horizontal is committed to building an inclusive environment where diverse perspectives are valued and everyone has the opportunity to contribute and succeed. We welcome candidates from all backgrounds and encourage applications from individuals who bring unique experiences, ideas, and approaches.