Senior IT Engineer

Senior IT Engineer

Location: Buena Park, CA

Work Schedule: Standard business hours; weekend on-call rotation required

Role Summary

We are seeking a Senior IT Engineer to support and enhance our on-premises infrastructure in the United States. The core requirements for this role are: 1) extensive, hands-on experience in enterprise wireless networks (UniFi/Aruba); 2) substantial experience in firewall management and Active Directory; and 3) a strong background in information security and compliance practices. The engineer will be responsible for the overall stability, efficiency, and security of our IT infrastructure.

Key Responsibilities

Enterprise Wireless Networking (Primary Focus)

• Design, deploy, troubleshoot, and optimize enterprise Wi-Fi networks.
• Provision and configure wireless access points (APs) and manage wireless controllers.
• Implement SSID design, security (WPA2/WPA3, 802.1X), and roaming optimization.
• Conduct RF tuning, channel planning, and interference troubleshooting.

Network Security & Identity Management (Secondary Focus)

• Configure, manage, and troubleshoot enterprise firewalls (security policies, VPN).
• Administer Active Directory (user/group management, GPO, domain security).

Information Security & Compliance

• Implement and maintain infrastructure security controls and best practices.
• Conduct system hardening, patch management, and vulnerability management.
• Enforce access controls and audit practices to ensure compliance.
• Participate in security monitoring, incident response, and disaster recovery planning.

General Infrastructure Management

• Operate, maintain, and troubleshoot Windows and Linux servers.
• Manage core network infrastructure (routing, switching, VLANs).
• Manage virtualization platforms (VMware vSphere, Hyper-V, Proxmox VE).
• Support Virtual Desktop Infrastructure (VDI) environments.
• Administer enterprise storage systems (SAN/NAS/DAS).
• Maintain technical documentation and participate in on-call rotation.

Requirements

Required Qualifications

• 5+ years of experience in infrastructure/systems engineering.
• Core Requirements: Extensive, hands-on experience with enterprise wireless networking. Must have expertise with Ubiquiti UniFi or Aruba Networks.
• Secondary Requirements: Substantial experience in configuring and managing enterprise firewalls. Substantial experience in administering Microsoft Active Directory. Hands-on experience with information security and compliance practices.
• Required Skills & Experience: Strong hands-on experience with Windows Server and Linux. Solid experience with enterprise networking (wired). Experience with virtualization platforms (VMware, Hyper-V, Proxmox VE). Familiarity with information security best practices. Strong troubleshooting and root-cause analysis skills.

Preferred Qualifications (Nice-to-Have)

• VDI performance optimization or large-scale desktop deployment experience.
• Wireless site survey or RF optimization experience. Experience with backup and DR solutions (e.g., Veeam).
• Scripting or automation experience (PowerShell, Bash).
• Relevant infrastructure, network, or security certifications (e.g., CCNA, Security+, CISSP).

Benefits

• Medical insurance
• Dental insurance
• Vision insurance
• Paid Time Off

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