Senior Network Engineer

Who we are DigiCert is a global leader in intelligent trust. We protect the digital world by ensuring the security, privacy, and authenticity of every interaction. Our AI-powered DigiCert ONE platform unifies PKI, DNS, and certificate lifecycle management, to secure infrastructure, software, devices, messages, AI content and agents. Learn why more than 100,000 organizations, including 90% of the Fortune 500, choose DigiCert to stop today’s threats and prepare for a quantum-safe future at www.digicert.com Job summary The Network Infrastructure team is responsible for the operation, monitoring, maintenance, and support of DigiCert's global production network. This position serves as a first responder for network incidents and operational requests, providing initial troubleshooting, monitoring, and administration of production network systems. What you will do Network Operations & Monitoring Monitor the health, performance, and availability of global production network infrastructure. Review device logs, alerts, and monitoring systems to identify and respond to operational issues. Perform initial troubleshooting and incident response for network-related events. Troubleshoot network, application, database, DNS, load balancing, and service connectivity issues across data center and cloud environments. Work with Internet service providers, telecommunications carriers, cloud providers, application teams, database administrators, and third-party vendors to diagnose and resolve connectivity, routing, latency, and service-impacting issues. Participate in incident response activities and assist with service restoration efforts during production outages. Escalate complex issues to senior engineers while providing accurate documentation and diagnostics. Participate in root cause analysis activities following service-impacting incidents Implement routine network configuration changes following established procedures. Perform basic firewall policy modifications and access control changes. What you will have Associate's or Bachelor's degree in Information Technology, Computer Science, Engineering, or a related field, or an equivalent combination of education and relevant experience. 5+ years of experience supporting enterprise, service provider, or data center network environments. Understanding of: TCP/IP, DNS, Routing and switching fundamentals, VLANs and network segmentation, Firewall concepts, VPN technologies Understand routing protocols and route troubleshooting concepts. Experience using network monitoring, logging, and observability platforms to identify, investigate, and respond to infrastructure issues. Experience reviewing system and device logs to assist with troubleshooting and incident response activities. Experience responding to operational incidents and working within established incident management processes. Experience troubleshooting network, application, database, DNS, and service connectivity issues in collaboration with service providers, cloud providers, vendors, and internal technical teams. Ability to perform network troubleshooting and isolate issues across routing, switching, firewall, load balancing, and cloud-connected environments. Strong analytical and problem-solving skills. Ability to follow operational procedures in a highly controlled production environment Excellent written and verbal communication skills Ability to participate in on-call support rotation and monthly maintenance. Nice to have Familiarity with Linux-based systems. Exposure to modern data center networking architectures, including Leaf-Spine fabric designs. Familiarity with data center networking technologies such as: Border Gateway Protocol (BGP) Virtual Extensible LAN (VXLAN) Ethernet VPN (EVPN) Understanding of overlay and underlay networking concepts within modern data center environments. Experience supporting Arista EOS-based switching environments. Experience using Arista CloudVision for network management, monitoring, automation, an…