About the role

Senior IT Infrastructure Administrator at Tantalus Systems, maintaining and upgrading on-premise Linux systems for smart grid solutions. Focus on security posture and cloud transitions in hybrid role.

Responsibilities

Oversee the day-to-day maintenance, support, and optimization of Linux server environments
Plan and execute system upgrades, patching, and lifecycle management for Linux systems
Monitor, maintain, and regularly test backup systems to ensure data integrity and recoverability
Perform physical server and storage system maintenance and upgrades as required
Lead system migrations, including transitions from CentOS to Ubuntu
Upgrade legacy systems to modern platforms or migrate workloads to cloud environments
Implement and maintain Linux automation using tools such as Ansible
Facilitate migrations between different hypervisor platforms
Design and implement network segmentation and isolation strategies
Enhance and maintain internal security controls and best practices
Manage and maintain internal certificate infrastructure
Respond rapidly and effectively to critical infrastructure issues and outages
Ensure high availability, reliability, and performance across all systems
Contribute to strengthening our infrastructure by improving backup strategies, business continuity and disaster recovery plans, and incident response processes and documentation

Bachelor’s degree in computer science, or related field (or equivalent work experience)
5+ years of experience in administering Linux clients and servers, networking, and cybersecurity
5+ years of experience in network management (VLANs, Firewalls, NAT, Segmentation, Proxy’s, Packet Sniffing, etc)
Physical capability to add/remove servers from a rack
Will be required to carry a cell phone for on-call support to respond to critical issues