Role Overview :
The Network & Infrastructure Administrator will be responsible for maintaining, optimizing, and securing enterprise-grade IT infrastructure across on-premises and cloud environments.
This includes the deployment, configuration, monitoring, and troubleshooting of network systems, servers, virtualization platforms, and core infrastructure applications.
The role demands strong technical acumen, hands-on operational expertise, and the ability to ensure the reliability, performance, and scalability of IT systems supporting business operations.
Key Responsibilities :
1. Infrastructure Operations & Maintenance :
- Manage daily operations of the enterprise infrastructure including servers, storage, virtualization, and network components.
- Perform system upgrades, patching, and performance tuning to ensure stability and security.
- Support IT infrastructure systems such as Active Directory, DNS, DHCP, email systems (Exchange On-Prem and Online), and file servers.
- Ensure adherence to established configuration, backup, and security policies.
- Maintain and troubleshoot network connectivity, hardware failures, and system outages with minimal supervision.
2. Network Administration :
Configure and maintain network devices such as switches, routers, firewalls, load balancers, and VPN appliances.Implement network segmentation, VLANs, routing protocols, and access control lists in line with organizational security standards.Monitor and analyze network performance, capacity, and traffic patterns using tools such as LAN Sweeper, Panorama (Palo Alto), and Aruba Controllers.Collaborate with cybersecurity teams to enforce firewall policies, intrusion detection systems, and endpoint protection measures.3. Virtualization & Cloud Systems :
Manage VMware vSphere, vCenter, and virtual machine lifecycle management across hybrid environments.Support Azure-based cloud services including Azure AD, Intune, and cloud-based storage or compute resources.Implement and maintain split DNS configurations and hybrid connectivity between on-prem and cloud environments.Participate in server provisioning, patch management, and automation efforts using PowerShell, Ansible, or equivalent tools.4. Security & Compliance :
Implement network and system hardening measures in accordance with best practices and audit requirements.Conduct regular infrastructure audits to ensure compliance with security standards, policies, and configuration guidelines.Support identity and access management through tools like CyberArk and LastPass.Assist in security incident response and vulnerability remediation activities using tools like Rapid7, Bitsight, and Security Scorecard.5. Monitoring, Troubleshooting & Documentation
Monitor system health and network performance, identifying and resolving issues proactively.Utilize monitoring tools and dashboards to detect anomalies and perform root-cause analysis.Document system configurations, network topologies, and troubleshooting procedures in Confluence or similar platforms.Participate in on-call rotations for after-hours infrastructure support (approximately every 6 months for 2-week rotations).6. Collaboration & Continuous Improvement
Work closely with cross-functional IT teams to ensure smooth infrastructure operations.Contribute to modernization initiatives such as cloud migrations, automation, and infrastructure-as-code.Provide input for improving operational efficiency, technology adoption, and process optimization.Required Technical Skills :
Core Infrastructure :
Windows Server Administration (2016 / 2019 / 2022)Active Directory, DNS, DHCP, Group Policy, WSUSVirtualization technologies (VMware vSphere, Hyper-V)Storage systems : NetApp / ONTAP, Dell / IBM / HP serversNetworking :
Cisco and Aruba networking hardwarePalo Alto Firewalls and Panorama managementLoad Balancers and WAN optimizationIPAM and Split DNS managementCloud & Endpoint Management :
Microsoft Azure administration, Intune, and M365 Admin CenterEndpoint security : Defender, BitLocker, McAfee, JAMF Protect, JAMF Threat DefensePatch management using WSUS, Patch My PC, Recast RCTAutomation & Scripting :
PowerShell scripting for administrative automationFamiliarity with Ansible for certificate management and configurationExperience with monitoring and reporting tools (SSRS, Excel, LAN Sweeper)Database & Application Support :
SQL Server and Oracle database administration basicsApplication integrations and troubleshooting with Exchange, SharePoint, and ProofpointQualifications & Experience :
Bachelors degree in Computer Science, Information Technology, or related field.23 years of hands-on experience as a Network Administrator or Infrastructure Administrator.Proven experience in managing enterprise IT systems, networks, and hybrid infrastructure environments.Knowledge of ITIL-based service management and change control processes preferred.(ref : hirist.tech)