Senior Linux Network Engineer

Itero Group•Annapolis, MD

About The Position

Itero Group is seeking a Senior Linux & Network Engineer with strong hands-on troubleshooting skills across enterprise Linux systems, IP networks, and highly available production infrastructure. This role involves acting as a first technical point of response and primary customer technical contact during production incidents, owning the investigation from initial detection through service restoration and follow-up. The engineer will perform hands-on troubleshooting across the complete service environment, including Linux systems, IP networks, firewalls, Pacemaker/Corosync clusters, Galera database clusters, virtualization, applications, and customer connectivity. Key responsibilities include diagnosing complex Linux and network problems, troubleshooting high availability environments, coordinating with internal teams and external parties, designing, deploying, maintaining, patching, hardening, monitoring, and improving infrastructure, performing root-cause analysis, executing production changes, maintaining documentation, and developing automation scripts.

Requirements

Strong hands-on Linux administration and troubleshooting experience in production environments, preferably Red Hat Enterprise Linux (RHEL).
Comfortable diagnosing services, processes, CPU/memory, storage and filesystems, networking, security, performance, and application-connectivity issues from the command line.
Strong knowledge of TCP/IP, routing, and switching.
Hands-on experience troubleshooting VLANs, routing protocols such as OSPF and BGP, firewalls, NAT, VPNs, TCP/UDP connectivity, packet loss, latency, and routing problems.
Hands-on experience supporting and troubleshooting highly available or clustered production systems, including concepts such as quorum, failover, node communication, fencing, replication, synchronization, and recovery.
Demonstrated ability to investigate complex problems across multiple technology layers using Linux diagnostic tools, logs, monitoring systems, routing information, and packet captures with tcpdump and/or Wireshark.
Experience supporting highly available, business-critical or mission-critical production environments, including incident response, change management, root-cause analysis, and direct technical communication with customers during service-impacting incidents.
Working knowledge of Bash and/or Python for Linux administration, troubleshooting, and operational automation.
Typically have 5+ years of hands-on experience supporting production Linux systems and IP networks, including responsibility for troubleshooting service-impacting incidents.

Nice To Haves

Experience with Juniper and/or Cisco infrastructure is preferred.
Experience with Pacemaker/Corosync and Galera Cluster is strongly preferred.

Responsibilities

Act as a first technical point of response and primary customer technical contact during production incidents, owning the investigation from initial detection through service restoration and follow-up.
Perform hands-on troubleshooting across the complete service environment, including Linux systems, IP networks, firewalls, Pacemaker/Corosync clusters, Galera database clusters, virtualization, applications, and customer connectivity.
Diagnose complex Linux and network problems using command-line tools, logs, monitoring data, routing information, and packet captures using tools such as tcpdump and Wireshark.
Troubleshoot routing, switching, firewall, VPN, TCP/UDP, performance, and connectivity problems, including packet loss, latency, asymmetric routing, and other service-impacting network conditions.
Troubleshoot highly available Linux and database environments, including Pacemaker/Corosync and Galera, with issues involving quorum, failover, cluster communication, replication, synchronization, and recovery.
Coordinate internal engineering teams, customers, network/data-center providers, and other third parties when additional assistance is required while maintaining technical ownership of the incident.
Design, deploy, maintain, patch, harden, monitor, and improve Etherstack's Linux, network, clustering, and cloud infrastructure.
Perform root-cause analysis, execute controlled production changes, maintain technical documentation, and develop Bash/Python automation to improve operations and troubleshooting.