Senior Systems Support Specialist – Mission-Critical, TS/SCI

AMERICAN SYSTEMS; Fairfield (PA); On-site; USD 97,000 - 162,000; Full time

Job summary

AMERICAN SYSTEMS is seeking a Systems Administrator, Senior to support the NISSC 3 program at Raven Rock, Pennsylvania. This TS/SCI environment role delivers on-site and on-call system administration, troubleshooting, maintenance, and user support to ensure operational readiness.

You will coordinate with program leadership, manage incident responses, perform data integrity tasks, and maintain logs and reports in compliance with security standards.

Qualifications

• Bachelor’s degree in IT, Cybersecurity, CS, IS, DS, SE, or equivalent DoD training.
• Active TS/SCI clearance required to start.
• DoD 8140 certification or Cloud+/GSEC/Security+/SSCP preferred.
• 7–10 years in systems or network administration in secure environments.

Responsibilities

• Provide onsite and oncall support for mission systems, including admin, monitoring, and health checks.
• Troubleshoot hardware, software, network, and system performance issues.
• Perform preventive and corrective maintenance, patches, updates, and tuning.
• Deliver firstline user support and training for system access and operations.
• Ensure logs, incident reports, and audits meet security and program standards.

Skills

Leadership

Resource allocation

Stakeholder updates

Scheduling

Documentation

Education

Bachelor’s degree in IT / Computer Science

DoD 8140 certification or Cloud+/GSEC/Security+/SSCP

Job description

AMERICAN SYSTEMS is seeking a Systems Administrator, Senior to support the NISSC 3 program at Raven Rock, Pennsylvania. This TS/SCI environment role delivers on-site and on-call system administration, troubleshooting, maintenance, and user support to ensure operational readiness.

You will coordinate with program leadership, manage incident responses, perform data integrity tasks, and maintain logs and reports in compliance with security standards.