Night-Shift System Administrator | Server & Security Ops

Castello Systems, Inc.; Corridor North (MD); On-site; USD 65,000 - 85,000; Full time

Job summary

Castello Systems, Inc. in Maryland’s Corridor North seeks a System Administrator to join our night-shift team (Wed–Sun, 10pm–6am; training Mon–Fri, 6am–2pm). The role covers system maintenance, monitoring, patching, and incident response across servers and applications.

You will handle user access, upgrades, and configurations, while enforcing security policies and aiding audits. Collaboration with IT teams and documentation of processes are essential for success.

Responsibilities

• System Administration & Maintenance: Monitor, manage, and maintain servers, operating systems, and key applications.
• Apply patches, updates, and configuration changes to systems in accordance with change management procedures.
• Perform routine system health checks, capacity planning, and performance tuning.
• User Support & Troubleshooting: Provide advanced technical support for escalated issues from help desk/Tier 1 teams.
• Diagnose and resolve system, application, and network-related problems.
• Assist with user account management, permissions, and access controls.
• Implementation & Configuration: Install, configure, and deploy new systems, applications, and tools.
• Assist in system upgrades, migrations, and integrations.
• Document system configurations, procedures, and standards.
• Security & Compliance: Ensure systems adhere to security best practices and organizational policies.
• Help implement and monitor security controls such as antivirus, endpoint protection, firewalls, and access management.
• Participate in audits, risk assessments, and remediation activities.
• Monitoring & Reporting: Use monitoring tools to track system performance, availability, and capacity.
• Respond to alerts, incidents, and outages, performing root cause analysis and corrective actions.
• Prepare reports on system health, incidents, and improvements for management.
• Collaboration & Process Improvement: Collaborate with IT teams (network, security, applications, help desk) on cross-functional initiatives and projects.
• Contribute to the development and refinement of IT processes, standards, and documentation.
• Provide input on technology selection and system architecture improvements.

Job description

Castello Systems, Inc. in Maryland’s Corridor North seeks a System Administrator to join our night-shift team (Wed–Sun, 10pm–6am; training Mon–Fri, 6am–2pm). The role covers system maintenance, monitoring, patching, and incident response across servers and applications.

You will handle user access, upgrades, and configurations, while enforcing security policies and aiding audits. Collaboration with IT teams and documentation of processes are essential for success.