Sr Network Operation Enginner

Senior Network and Systems AdministratorJob SummaryBased at our office in Annapolis Maryland, you will be a core member of our 24/7/365 operations team, responsible forproviding networking and IT administration for the Mission Critical Emergency Communications Service — deliveringmission-critical public safety communications to customers around the clock without interruption. You will serve asa senior technical resource across our operations team, providing escalation-level support, proactively monitoringsystems, executing upgrades, and ensuring Mission Critical's IT infrastructure always operates at peak performance andsecurity.You will design, implement, and maintain network operations across Mission Critical's global offices and clouddeployments, with a strong DevOps mindset — automating workflows, managing infrastructure as code, andbuilding repeatable, resilient processes. You will be responsible for maintaining comprehensive documentation of ITpolicies, procedures, hardware, and software. This role requires availability for on-call duties and scheduled shiftrotations to ensure continuous coverage. Travel to our offices and data centers in the UK, Japan, and USA may berequired periodically.Key Responsibility Areas1. Provide L3 technical support through Mission Critical's 24/7/365 service desk, including on-call rotations andshift-based coverage; respond to, triage, escalate, and resolve incidents in accordance with defined SLAs.2. Proactively monitor all IT systems, networks, and cloud infrastructure using observability tooling; identifyand remediate issues before they impact operations.3. Design, deploy, and maintain Mission Critical's IT networks— including cloud-hosted environments—with a focuson resilience, redundancy, and security; augment infrastructure to support new projects and services.4. Ensure IT systems meet security and compliance standards; plan and execute upgrades, patches, andhardening activities.5. Maintain and administer user accounts, access controls, and application software licenses.6. Conduct regular audits of IT systems and software; maintain an accurate, up-to-date asset register.7. Document policies, procedures, infrastructure, and system configurations to a professional standard.8. Analyze, test, and deploy software patches and updates in a controlled, risk-managed manner.9. Provide technical guidance and mentorship to junior team members; contribute to knowledge base articlesand training materials.Required Qualifications1. Bachelor's degree in a field related to IT, computer science, or telecommunications.2. Juniper Engineer level certification in both Routing and Switching (JNCIP) and NetworkSecurity (JNCIP-SEC).3. Red Hat Certified Engineer (RHCE), and Red Hat Certified Specialist in Security certifications.Required Experience1. At least three years of senior-level experience in systems and network administration, ideally within a 24/7operations or NOC environment, with demonstrable on-call and shift rotation experience in a missioncritical setting.2. ISP/Telecommunications background: Proven experience in an ISP or carrier-grade networking environment.3. Experience deploying and maintaining virtualized Linux servers (on-premises and cloud).4. Experience designing and implementing secure, robust network architectures including VPNs, VLANs, andfirewall configurations; hands-on experience with Cisco, Juniper, and open-source tools such as FRR routing.5. Strong scripting and automation proficiency in Bash, Python, and Ansible.6. Experience with Linux on virtualized platforms (OpenStack, OpenShift, VMware, Microsoft Azure), withstrong expertise in Red Hat Enterprise Linux (RHEL), including Subscriptions, Licensing, IdM Server, andSatellite Server.7. Experience configuring, troubleshooting, and hardening VMs and servers using Intrusion Detection Systems(IDS).8. Hands-on experience with monitoring and observability stacks: Grafana, Prometheus, Loki, or Thanos.Required Skills1. Excellent written and oral English communication skills, including the ability to write clear incident reportsand post-mortems.2. Ability to remain composed and make sound decisions under pressure during critical incidents; strongprofessional relationship skills in a fast-paced, always-on environment.3. Routing & Switching: Deep expertise in IP routing and switching, including MPLS, BGP, OSPF, EIGRP, RIP,Multicast, VLANs, Inter-VLANs, Spanning Tree, BFD, VXLAN, eVPN, IS-IS, and VRRP.4. VPN & Security: Solid experience with IPSec VPNs, SSL VPNs, and advanced firewall configuration.5. Network Troubleshooting: Strong ability to diagnose and resolve complex, time-sensitive networking issuesefficiently.6. Systems Administration: Installation, configuration, hardening, maintenance, and patching of network andserver infrastructure; advanced troubleshooting in disk/storage management including LVM, RAW, XFS,EXT4, and BTRFS.7. Monitoring & Observability: Configuring, troubleshooting, and managing systems including Grafana,Prometheus, Elasticsearch, and related tooling.8. DevOps Practices: Familiarity with Git-based workflows and automated deployment strategies in productionenvironments.Highly Regarded Skills and Attainments1. Cloud certification (Azure, AWS, or Google Cloud) and experience with Terraform or similar IaC tools forcloud provisioning.2. Cybersecurity training and certification (e.g., CompTIA Security+, CISSP)3. Experience contributing to DevOps or SRE frameworks, including CI/CD pipelines, infrastructure-as-code(Terraform, Ansible), and version-controlled configuration management.4. Quality of Service (QoS) configuration on routers, switches, and firewalls.5. Experience with network management tools (e.g., Nagios) and protocols (e.g., SNMP); expertise inauthentication technologies, particularly Active Directory and LDAP.6. Familiarity with ITIL or similar service management frameworks relevant to 24/7 operations.Right to WorkThe nature of this role requires permanent, full-time US working rights. Employment issubject to drug screening, background check, and possible security clearance. Due to the24/7/365 nature of the role, candidates must be willing and able to participate in shiftrotations and on-call schedules as required