NETWORK ENGINEER - ABUJA

We are seeking an experienced Network Engineer to maintain and support a critical client environment in Abuja in line with agreed service-level agreements (SLAs).

The successful candidate will provide hands-on support across network, security, unified communications, server, virtualisation, backup, and monitoring platforms. The role requires an engineer who can design, implement, administer, optimise, and troubleshoot enterprise infrastructure while safeguarding availability, security, performance, and business continuity.

This is a contract-based, on-site role in Abuja. The engineer will work closely with the client, service delivery teams, vendors, and technology partners, and may be required to support planned maintenance or critical incidents outside standard working hours.

Core Responsibilities

Network Operations

• Manage and support LAN, WAN, WLAN, VPN, and SD-WAN infrastructure.

• Configure and support Aruba network switches, Aruba gateway, and wireless access points, Aruba ClearPass

• Implement and monitor VLANs, routing protocols (OSPF, BGP, EIGRP), and QoS policies.

• Troubleshoot latency, packet loss, and connectivity issues.

• Maintain accurate network diagrams, IP address plans, configuration backups, and standard operating procedures.

• Plan and execute network changes using approved change-control processes, including testing, rollback, and post-implementation validation.

Network Security

• Manage and support Fortigate firewalls, Palo Alto Firewalls, Aruba ClearPass Network Access Control Solution.

• Manage site-to-site VPNs, remote access VPNs, and secure tunneling.

• Monitor logs, IDS/IPS alerts, and ensure compliance with security best practices.

• Apply patches, harden systems, and conduct vulnerability remediation.

• Review firewall rules, access policies, and privileged access regularly to reduce security risk and maintain least-privilege controls.

• Support security investigations by preserving relevant logs, documenting findings, and coordinating remediation with stakeholders.

Voice and Unified Communications

• Maintain enterprise telephony/UC platforms

• Manage SIP trunks, voice gateways, dial plans, and call routing.

• Monitor call quality, availability, and capacity, and troubleshoot signalling, media, codec, and QoS issues.

• Maintain voice configurations, numbering plans, and recovery documentation.

Server, Virtualisation and Business Continuity

• Administer Windows and Linux servers (on-premise and virtualized).

• Manage AD, DNS, DHCP, Group Policy, and file/print services.

• Maintain VMware/Hyper-V clusters and ensure high availability.

• Implement and monitor backup and disaster recovery solutions.

• Monitor server capacity, operating-system health, storage, and core infrastructure services, escalating risks before service degradation occurs.

• Perform scheduled recovery tests and document results, gaps, and corrective actions.

Monitoring, Service Management and Support

• Deploy and manage monitoring tools (CheckMK, SolarWinds, PRTG, etc.).

• Track bandwidth utilization, uptime SLAs, and performance trends.

• Document changes, configurations, and incident resolutions.

• Provide L2/L3 escalation support for critical incidents.

• Conduct periodic preventive maintenance to sustain the optimal performance, availability, and security of the network infrastructure.

• Own incidents through diagnosis, escalation, stakeholder communication, resolution, and root-cause documentation.

• Produce regular service reports covering availability, capacity, recurring incidents, security events, risks, and improvement actions.

• Maintain asset, configuration, support, warranty, and licensing records for supported infrastructure.

• Coordinate technical activities with client stakeholders, vendors, carriers, and service partners.

Key Deliverables and Success Measures

• Meet agreed availability, incident-response, restoration, and change-success targets.

• Reduce recurring incidents through problem management, root-cause analysis, and preventive actions.

• Maintain current, accurate, and audit-ready technical documentation and configuration records.

• Complete approved patching, preventive maintenance, backup checks, and recovery tests within agreed schedules.

• Communicate service risks, outages, remediation plans, and progress clearly and promptly.

Requirements

Requirements

• Education/Experience:

• Bachelor’s degree in Computer Science, IT, or related discipline.

• 4–6 years of hands-on experience managing enterprise IT infrastructure.

• Demonstrable experience supporting business-critical infrastructure in a structured, SLA-driven environment.

• Experience working directly with clients, third-party providers, and distributed support teams.

• Technical Expertise:

• Networking: Cisco/Aruba switches and routers.

• Security: Firewalls, Network Access Control (NAC).

• Voice: VoIP, SIP, RTP, QoS.

• Servers: Windows/Linux, VMware/Hyper-V.

• Cloud exposure (Azure/AWS/M365) is a plus.

• Strong knowledge of TCP/IP, subnetting, routing, switching, DNS, DHCP, VPNs, high availability, and network troubleshooting.

• Practical experience with enterprise monitoring, ticketing, change management, incident management, and technical documentation.

• Working knowledge of backup, disaster recovery, infrastructure security, vulnerability remediation, and access-control principles.

• Certifications:

• Cisco Certified Network Professional (CCNP) certification is mandatory.

• Relevant Fortinet certification and HPE Aruba Networking certification are highly de