Cyber Security Engineer

Role level: L2
Primary expertise: Infoblox DDI (DNS, DHCP, IP Address Management)

Role summary

Were looking for an L2 Network Support Engineer with strong hands-on Infoblox experience and a solid foundation in routing and switching. The role handles operational support, incident troubleshooting, configuration changes, and escalations across enterprise DNS, DHCP, IPAM, and network services.

Key responsibilities

• Provide L2 support for Infoblox DDI services, including DNS, DHCP, and IPAM.
• Troubleshoot DNS resolution, DHCP lease, IP allocation, and connectivity issues.
• Administer Infoblox appliances and services, including Grid components, members, zones, networks, ranges, and records.
• Monitor service health, investigate alerts, and support incident and problem management.
• Perform approved configuration changes and maintain accurate documentation.
• Troubleshoot network issues involving VLANs, subnets, gateways, routing, and switching.
• Coordinate with L1, L3, security, server, and application teams to resolve incidents.
• Support upgrades, patching, backups, recovery, and maintenance activities as required.
• Follow change-control, incident-management, and operational procedures.

Required skills

• Hands-on experience supporting Infoblox DDI in an enterprise environment.
• Practical knowledge of DNS, including zones, records, forwarders, recursion, and troubleshooting resolution failures.
• Practical knowledge of DHCP, including scopes, leases, reservations, and troubleshooting address assignment.
• Understanding of IPAM, subnet management, IP allocation, and address-plan documentation.
• Working knowledge of routing and switching, including VLANs, subnets, default gateways, and basic route troubleshooting.
• Familiarity with common network tools and methods such as nslookup/dig, ping, traceroute, and packet capture.
• Experience working with ticketing, incident, and change-management processes.
• Clear written and verbal communication, with the ability to document investigation and resolution steps.

Preferred skills

• Infoblox Grid administration and troubleshooting experience.
• Exposure to Infoblox Reporting, NIOS upgrades, backups, or HA/failover operations.
• Familiarity with DNS security concepts such as DNSSEC, RPZ, or external DNS filtering.
• Experience with network vendors such as Cisco, Juniper, or equivalent.
• Basic scripting or automation experience, such as Python, Ansible, or Infoblox APIs.
• Relevant Infoblox or networking certifications.

Candidate profile

A suitable candidate can independently resolve common Infoblox DNS, DHCP, and IPAM incidents, recognize when an issue involves the wider network, and escalate complex cases with clear evidence and troubleshooting notes. Infoblox should be the candidates core area of expertise, with routing and switching providing the network foundation needed to diagnose related issues.