Network Administrator

Quantum World Technologies Inc.; San Diego (CA); On-site; USD 52,348 - 60,614; Part time

Job summary

A technology firm in cybersecurity seeks a Mid-Senior Level Systems Administrator to manage Windows and Unix systems, as well as network infrastructure critical for enterprise controls. Candidates should have a Bachelor's degree and 4+ years of systems administration experience, along with strong knowledge of network protocols and cybersecurity frameworks. This role offers an hourly salary between $38 and $44, based in the San Diego Metropolitan Area.

Qualifications

• 4+ years of experience in network or systems administration.
• Strong knowledge of network protocols and routing.
• Familiarity with industrial control systems (DCS, SCADA, PLC).

Responsibilities

• Administer and maintain Windows and Unix systems.
• Manage network infrastructure for control and monitoring systems.
• Implement cybersecurity and governance policies.

Skills

Network protocols

Routing

VLANs

Segmentation

Firewall administration

Cybersecurity frameworks

System documentation

Education

Bachelor’s degree in IT, Cybersecurity, or related field

Tools

Backup tools

Log monitoring utilities

Job description

Responsibilities

• Administer and maintain Windows, Unix/Sun systems, and associated servers.
• Manage network infrastructure (switches, routers, firewalls, fiber) used in control and monitoring systems.
• Configure and monitor firewalls, manage rule sets, and perform routine log reviews.
• Maintain user access controls, permissions, and account inventories for DCS/SCADA systems.
• Implement and enforce cybersecurity and governance policies in accordance with organizational and regulatory requirements.
• Maintain backups, perform patching, and ensure antivirus and endpoint protection are current.
• Monitor system health, logs, and network performance for early issue detection.
• Support secure data exchange between control systems, historians, and enterprise systems.
• Maintain accurate documentation for configurations, changes, and access records.
• Provide after-hours or on-call support for control system network issues.

Qualifications

• Bachelor’s degree in IT, Cybersecurity, or related field; or equivalent experience.
• 4+ years of experience in network or systems administration.
• Strong knowledge of network protocols, routing, VLANs, and segmentation.
• Experience with firewall administration and security rule management.
• Familiarity with industrial control systems (DCS, SCADA, or PLC-based networks).
• Knowledge of cybersecurity frameworks and governance practices (e.g., NIST, ISA/IEC 62443).
• Proficiency in system documentation and configuration management.

Preferred

• Experience in OT or critical infrastructure environments.
• Familiarity with backup tools, patch management, and log monitoring utilities.
• Understanding of IT/OT network separation and secure data bridging.

Seniority Level

Mid-Senior level

Employment Type

Contract

Job Function

Information Technology

Industries

IT Services and IT Consulting

Location: San Diego Metropolitan Area

Salary: $38 - $44 per hour