NexusTek

Network Administrator – Contract

NexusTek

contract

Posted on:

Location Type: Office

Location: Santa Clara • California • 🇺🇸 United States

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Job Level

Mid-LevelSenior

Tech Stack

AzureCloudCyber SecurityDNSFirewallsLinuxTCP/IPVMware

About the role

  • Design, deploy, and maintain core network infrastructure, including firewalls, routers, switches, and VPNs.
  • Configure and manage enterprise Linux and Windows Server environments, including DNS, DHCP, Group Policy, and File Services.
  • Administer and support virtualization platforms such as VMware ESXi, Microsoft Hyper-V, or Proxmox VE.
  • Plan and manage scalable storage solutions (NAS, SAN) for high availability and disaster recovery.
  • Perform hands-on data center work, including hardware installation, cabling, and troubleshooting.
  • Design and manage Azure Cloud environments (IaaS, networking, security groups, NSGs, VNets, VPN Gateways).
  • Integrate and administer Azure Active Directory, Microsoft 365, and related identity and access management solutions.
  • Maintain and troubleshoot on-premise Active Directory or LDAP-based authentication infrastructure.
  • Implement and maintain network security best practices including firewall policies, intrusion prevention/detection, and endpoint security.
  • Ensure systems and configurations meet compliance standards (e.g., ISO, SOC2, HIPAA, as applicable).
  • Monitor, analyze, and remediate vulnerabilities in system and network infrastructure.
  • Monitor system and network performance, ensuring high availability and performance tuning.
  • Provide tier 3 escalation support to internal IT teams and occasionally to end users.
  • Develop and maintain comprehensive infrastructure documentation, including topology diagrams and configuration guides.
  • Participate in change management and capacity planning efforts.
  • Work closely with application, cybersecurity, and DevOps teams to align infrastructure services with organizational goals.
  • Evaluate and recommend new technologies and tools to improve efficiency, security, and reliability.

Requirements

  • Bachelor’s degree in Computer Science, Information Technology, or equivalent experience.
  • 5+ years of hands-on experience in a senior infrastructure or systems/network engineering role.
  • Strong Linux systems administration experience.
  • Advanced expertise with firewalls (e.g., Fortinet, Palo Alto, Cisco ASA), routers, and switches.
  • Strong hands-on experience with Windows Server platforms, Active Directory, Group Policy, and PowerShell scripting.
  • Proven experience in Azure cloud infrastructure, including compute, networking, and security services.
  • Proficient in VMware vSphere/ESXi, Microsoft Hyper-V, or Proxmox VE.
  • Familiarity with enterprise storage platforms, including backup and replication strategies.
  • Knowledge of network protocols and services (TCP/IP, DNS, DHCP, SSL, SNMP, etc.).
  • Excellent problem-solving, analytical, and communication skills.
  • Willingness to perform hands-on data center work and occasional travel to the Austin site or other data centers.
Benefits
  • 5 days per week on-site is preferred, with travel to data centers as needed.
  • May require availability outside of standard hours for maintenance windows or critical incidents.
  • Occasional travel to the Austin site may be required.

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
Linux administrationWindows Server administrationfirewallsroutersswitchesVPNsAzure cloud infrastructureVMware ESXiMicrosoft Hyper-VActive Directory
Soft skills
problem-solvinganalytical skillscommunication skills