Senior Network Systems Administrator

TYPE OF RECRUITMENT

We welcome applications from everyone.

Applications will be accepted beginning Wednesday, February 11, 2026 at 8:00 a.m. through Tuesday, February 24, 2026 before 5:00 p.m. (PT)

R2560N-R

County of Los Angeles is recruiting for highly motivated and career minded individuals to fill the position of Senior Network Systems Administrator. We invite you to explore the possibility of joining a team who will turn challenges into opportunities and share the future of public sector IT!

With more than 10 million residents, Los Angeles County is the most populous county in the nation. As the largest employer in Southern California, over 112,000 employees in more than 36 departments, we provide vital public services as diverse as law enforcement, property assessment, public health protection, water conservation, cultural activities and many more.

We are dedicated professionals committed to preserving the dignity and integrity of the workplace as well as protecting the rights of each employee. With more than 2,300 different job descriptions, the County offers a lifetime of opportunities and careers! We offer one of the strongest public‑sector benefits packages in the nation. Join us and discover a rich selection of health care options, robust retirement plans, and the flexibility to work, relax, and rejuvenate in order to reach your fullest personal and professional potential.

to see a list of employee benefits.

• Performs network administration functions such as designing, configuring, deploying, testing, repairing and maintaining hardware/software/firmware upgrade.
• Plans the deployment of hardware, firmware and software upgrades for network appliances, gateways, and associated telecommunication devices.
• Configures and supports network devices such as Layer 2 and 3 configurations, Voice Gateways, wireless access points and controllers.
• Leads system administration functions such as designing and implementing enterprise infrastructure which encompasses hardware, servers and virtual systems.
• Leads and plans the deployment of hardware and software upgrades for servers and storage (e.g., Blade Systems, Server Virtualization, Active Directory, clustering, VoIP, storage solutions, video conferencing systems).
• Leads, designs and implements network security solutions (e.g., system network access control lists and host/network intrusion prevention systems) along with policy elements (e.g., end user roles and groups, trust relationships, access rights, directories, virus protection, security patch management, firewalls and software deployment).
• Mitigates various enterprise cybersecurity threats and vulnerabilities (e.g., malware, viruses, spyware, adware, trojan horses, worms, phishing, spear phishing).
• Provides senior level support for information enterprise cybersecurity breaches (e.g., internal/external violations/threats, hacker attacks, viruses and system access).
• Analyzes Network performance, throughput and bandwidth optimization requirements to solve the more complex system configuration and performance issues.
• Identifies and recommends appropriate network device changes.
• Sets and verifies system thresholds, performs network tests, queries as needed in response to alerts.
• Performs critical data and configuration backup, database backup, system recovery, and/or participates in activities pertaining to business continuity and disaster recovery plans.
• Performs site assessment including cabling, rack elevations, electrical, HVAC (Heating Ventilation Air Conditioning), and peripherals.
• Designs and implements video and web teleconferencing solutions.
• Participates in the analysis, evaluation, and risk assessment tasks required for implementation of new applications, and system changes (e.g., vendor provided patches, service packs, network products, devices and network management solutions).
• Develops and maintains network standard operating procedures, logs, and files.
• Tracks network assets (e.g., virtual servers, software subscriptions, network endpoints, mobile device manager) including purchasing, receiving, deployment, decommissioning, and disposal.
• Serves as a subject matter expert and provides technical recommendations for vendor products and services.
• Leads a network support team and serves as a project lead.
• Provides technical guidance and knowledge sharing to assigned staff and vendors.

A Bachelor's degree from an accredited college or university in Computer Science, Information Systems, or a closely related field & three (3) years of full‑time experience in a centralized Information Technology organization within the last five (5) years in LAN design, configuration, and administration.

Four (4) years of progressively responsible, full‑time experience in a centralized Information…