NexusTek ยท 2 months ago
Network Administrator (Contract)
Santa Clara, CA, US
Full-time, Contract
Onsite
Senior Level
5+ years expNexusTek is seeking a Network Administrator to manage and optimize cloud-based and on-premise systems with a focus on network security and server infrastructure. The role involves hands-on data center work and supporting infrastructure projects end-to-end while providing high-level support to internal stakeholders.
Cloud Data ServicesCloud InfrastructureCloud ManagementCyber SecurityData CenterEnterprise Resource Planning (ERP)Enterprise SoftwareIT ManagementSoftwareVirtual Desktop
Responsibilities
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
Qualification
Required
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
Preferred
Industry certifications such as Microsoft Certified: Azure Administrator Associate, VMware VCP, Cisco CCNP, CompTIA Network+, or Security+
Experience with automation tools such as Ansible, Terraform, or PowerShell DSC
Familiarity with hybrid identity models and SSO/SAML integrations
Experience supporting environments within regulated industries (e.g., finance, healthcare, government)
Company
NexusTek
Delivering business outcomes with IT solutions that optimize, grow, and secure your business.
201-500 employees
H1B Sponsorship
NexusTek has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2021 (1)
Funding
Current Stage
Growth StageTotal Funding
unknownKey Investors
A&M Capital Strategic InvestmentsLightview Capital
2023-05-16Private Equity
2017-12-13Acquired
2014-09-11Private Equity
Leadership Team
Hamilton Yu
Chief Executive Officer
Scott Ray
Chief Operating Officer
Recent News
2025-12-05
Company data provided by crunchbase