Senior Network System Administrator Job Agoura Hills area,California USA,IT/Tech

Position: Senior Network System Administrator`

Duties:

IT Infrastructure Administration and Support

Administration and implementation of IT Infrastructure including networks, servers, Microsoft tenant, Entra, Active Directory and more
Setup and ensure LAN/WAN system and services are compliant with the organization’s guidelines and procedures including SD‑WAN, VLAN segmentation, and secure remote connectivity
Monitor and ensure LAN/WAN performance meets organizational needs including performance, resiliency, and traffic routing across distributed locations
Maintain domain name registrations and certificates needed for organization’s operations including SSL certificates, SSO certificates, and expiration monitoring
Configure email services – Microsoft Exchange Online or Server and Microsoft 365 software
Ensure systems are properly configured and Operating Systems are updated and secure including endpoint compliance policies, patching, and device security baselines
Provide IT support escalation for complex support issues related to IT systems, software, and hardware
Track software usage and licensing to ensure legal compliance including Microsoft licensing, SaaS subscriptions, and vendor licensing portals
Troubleshoot remote access connectivity issues including VPN, conditional access, and endpoint compliance‑related access issues

Security

Create, implement, enforce, and monitor security policies, strategies, and procedures to protect the data and systems of the organization
Configure and maintain security for all aspects of the Microsoft tenant, domain, network, servers, email, software systems, and end‑user computers
Install, configure, and maintain enterprise security platforms including Fortinet (Fortigate, Forti Client, EMS, and related services), Microsoft security tools, and endpoint protection platforms
Implement and maintain Single Sign‑On (SSO) and Multi‑Factor Authentication (MFA) for all major software systems including enterprise application registration, SSO configuration, certificate lifecycle management, and identity governance
Monitor, investigate, and respond to security events and alerts across systems including firewall, endpoint, and identity platforms

Telecommunications

Support VOIP telecommunication system and on‑going needs of organization
Ensure voice and conferencing capabilities for headquarters and field operations is working properly and engage vendor for support and new services when needed
Configure and troubleshoot mobile devices, connectivity, and integration to our software systems

Software Systems Administration

Implement and oversee Security Administration of major software systems used by organization
Administer and support cloud‑based SAAS platforms, CRM and ERP systems used across the organization including integration with SSO, user provisioning, and access control
Utilize Intune to secure, control and manage organizational devices and applications including Autopilot deployment, Win
32 application packaging, compliance policies, and device lifecycle management
Administer all Microsoft 365 systems such as Teams, Sharepoint, One Drive, etc. including security configuration, sharing controls, and governance policies
Automate system administration tasks using scripting and modern tooling (Power Shell, APIs, or equivalent)
Research and implement integrations between enterprise systems to improve efficiency and security
Complete training or self‑study to gain knowledge and/or certifications for new software systems to ensure proper administration and security
Research and implement innovative and automated approaches for system administration tasks and operational efficiencies that will save time and effort including scripting, automation, and process optimization
Lead and guide vendor engagement for enhanced services and support of systems

Printing & Scanning Solutions

Manage network printers and multi‑functional printers, and printing services including cloud printing systems
Interface with vendors to ensure equipment is serviced and supported

Documentation and Training