Systems Engineer III

Systems Engineer III page is loaded## Systems Engineer III locations:
Huntington Beach, CAtime type:
Full time posted on:
Posted 3 Days Agojob requisition :
R-101037
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* WORK SHIFT:

** First Shift (United States of America)
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* JOB DESCRIPTION:

** The System Engineer III will be responsible for providing extensive knowledge and working expertise in Active Directory, Group Policy, Power Shell scripting, Windows and Linux server administration, virtualization, and enterprise network infrastructure. This role is responsible for all security across all layers of the OSI/TCP/IP model, as well as deep experience with Microsoft 365, certificate services, and enterprise storage systems.

This role is responsible for a high level of technical proficiency, strong documentation skills, and the ability to mentor junior IT staff. This role is required and must be adaptable, able to learn new technologies, and capable of supporting complex multi-domain environments.

ESSENTIAL JOB FUNCTIONS
• Design, implement, and maintain enterprise network and server infrastructure across multi-site, multi-domain environments.
• Administer and troubleshoot Active Directory, including forests, trusts, replication, DNS integration, and domain migrations.
• Develop, manage, and troubleshoot Group Policy Objects (GPOs) to enforce security and system configuration.
• Write and maintain Power Shell scripts for automation, reporting, and administrative tasks.
• Administer and support Windows Server (2012–2025) and Linux systems.
• Configure and manage Microsoft 365 services (Exchange Online, SharePoint, Teams, security, identity management).
• Design and manage Layer 2/Layer 3 network infrastructure, including VLANs, subnetting, routing, and switching.
• Configure and maintain Cisco and Ruckus switches, including creating and supporting Link Aggregation Groups (LAGs).
• Manage virtualization environments including VMware vSphere, Microsoft Hyper-V, and Proxmox.
• Administer enterprise storage systems (SAN/NAS), including Synology NAS.
• Create and manage digital certificates and maintain internal certificate authorities (CAs) for secure communications.
• Configure and support firewalls, VPNs, and SD-WAN solutions;
Forti Gate experience is a plus.
• Utilize network monitoring tools (e.g., SNMP, What’s Up Gold, PRTG) for proactive infrastructure monitoring and response.
• Implement and manage security at all layers of the OSI/TCP/IP model, including physical, network, transport, and application layers.
• Create and maintain comprehensive technical documentation, including standard operating procedures, manuals, and Visio diagrams.
• Train and mentor junior IT staff, promoting knowledge sharing and consistent operational practices.
• Participate in and lead infrastructure projects, including upgrades, migrations, and disaster recovery planning.
• Stay current with new technologies and industry best practices, demonstrating the ability to quickly learn and adopt new tools and platforms.
• Maintains reliable and consistent attendance, including being punctual, dependable, and flexible to potential schedule changes to meet the needs of the department and the organization.
• Executes each essential duty satisfactorily to perform job successfully.
• Follows all safety procedures required in work area, wears PPE as needed, attends all safety meetings, and reports safety issues regarding equipment or unsafe/hazardous conditions.
• Performs effectively as a team member, able to work well with others, open to receive and give feedback, and treats everyone with respect.
• Takes ownership of own work and behavior, accepts accountability for own actions, encourages solutions, and communicates status of work/projects.
• Follows all department quality standards/criteria. Raises concerns and issues to management.
• Understands department’s key performance indicators (KPIs) and contributes to achieve these goals both individually and as a team.
• Other duties as needed or required.

ADDITIONAL RESPONSIBILITIES
• Ability to be on call 24 hours a day, 7 days a week for global operations, by periodically providing off-hours, evening, and weekend support to accommodate maintenance windows…