Linux System Administrator

About Intermedia Are you looking for a company where YOUR VOICE is heard? Where you can MAKE A DIFFERENCE ? Do you THRIVE in a FAST-PACED work environment? Do you wake every morning EXCITED to work with GREAT PEOPLE and create SUCCESS TOGETHER ? Then Intermedia is the place for you. Intermedia has established itself as a leading provider of cloud communications and collaboration technology that enables businesses to connect, communicate, and collaborate more effectively. We have a strong track record of growth, profitability, and fostering an environment where everyone matters. While we move fast and think big, we also invest in our people, encourage innovation, and provide opportunities for long-term career growth. Many of our employees have been with us for 10, 15, and even 20+ years. Our culture is built on teamwork, transparency, and accountability. We support one another, celebrate successes together, and continuously strive to improve. Are you ready to make your mark? About the Team The Linux Systems Administration (LSA) team manages and operates the Linux infrastructure powering Intermedia's production services across multiple on-premises and cloud data centers. Our team is distributed across the US and EMEA, working collaboratively on infrastructure automation, platform lifecycle management, monitoring, and incident response. You'll work alongside experienced Linux Systems Administrators and DevOps Engineers who value automation, Infrastructure as Code, thorough documentation, and continuous improvement. What You'll Do Linux Infrastructure Provision, configure, monitor, and decommission Debian-based virtual machines across Hyper-V, VMware ESXi, and OLVM environments using Cinc (Chef) and Ansible automation. Perform routine Linux system administration, troubleshooting, and maintenance. Participate in operating system upgrades and lifecycle management. Configuration Management Develop, review, and maintain Cinc (Chef) cookbooks, Ansible playbooks, roles, data bags, and environments. Improve infrastructure automation and configuration consistency. Monitoring & Observability Onboard servers into internal monitoring systems and Grafana. Configure SNMP-based monitoring and alerting. Investigate monitoring alerts and assist in resolving operational issues. Participate in production monitoring during scheduled shifts. Platform Operations Assist in operating shared infrastructure services, including: RabbitMQ Elasticsearch Graylog Grafana Postfix mail relay clusters BIND DNS servers Sentry Security & Patch Management Apply operating system and security updates through CI/CD pipelines and unattended upgrades. Maintain firewall configurations (iptables, IP sets, F5 LTM/GTM). Assist with TLS certificate lifecycle management using DigiCert and internal Certificate Authorities. Incident Response Participate in production incident response, disaster recovery activities, and post-incident reviews. Help identify root causes and contribute to long-term operational improvements. Documentation Maintain runbooks, operational documentation, knowledge base articles, and SaaS GRID documentation in Confluence. Infrastructure Projects Participate in infrastructure modernization initiatives, including: Hypervisor migrations (VMware ESXi and Hyper-V to OLVM) Debian major-version upgrades Legacy platform migrations Data center consolidation and decommissioning Skills, Knowledge & Expertise Bachelor's degree in Computer Science, Information Technology, or a related technical field, or equivalent practical experience. 1–4 years of hands-on Linux systems administration experience (Debian or Ubuntu preferred). Solid understanding of Linux fundamentals, including: systemd networking (VLANs, DNS, NTP) filesystems user and group management LDAP authentication Experience with at least one configuration management platform (Ansible or Chef/Cinc). Familiarity with virtualization platforms such as Hyper-V, VMware ESXi, or KVM/OLVM. Basic Bash scripting skills and the ability to understand and modify existing Python scripts. Understanding of web servers and reverse proxies, particularly Nginx. Basic knowledge of TLS/SSL certificate management. Experience using Git for source control and code reviews. Ability to work in production environments while following change management procedures. Good written English skills for documentation and collaboration across distributed teams. Even Better If You Have Experience administering RabbitMQ, Elasticsearch, or Graylog. Familiarity with Postfix mail relay configuration. Experience with F5 LTM/GTM or A10 load balancers. Knowledge of monitoring tools such as Grafana, Telegraf, and SNMP. Exposure to Docker and containerized workloads. Familiarity with Percona MySQL and XtraBackup. Experience with TeamCity or similar CI/CD platforms. Experience with NetBox or other IPAM/DCIM solutions. Knowledge of enterprise backup solutions such as Veeam or NetBackup. Familiarity with Test Kitchen and Dokken for local Chef cookbook testing. Technology Stack Operating System | Debian Virtualization | Hyper-V, VMware ESXi, OLVM Configuration Management | Cinc (Chef), Ansible Web Services | Nginx, Apache Containers | Docker Messaging | RabbitMQ Search & Logging | Elasticsearch, Graylog Monitoring | Grafana, Telegraf, SNMP Mail | Postfix DNS | BIND Load Balancing | F5 LTM/GTM, A10 Security | iptables, IP sets, Qualys, Splunk, Falcon, DigiCert, Internal CA Package Repositories | Sonatype Nexus, Aptly, Artifactory Databases | Percona MySQL, H2 CI/CD | TeamCity, GitLab Collaboration | Confluence, ServiceNow, Redmine