Network System Administrator

Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now—protect and innovate with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Network System Administrator-III to join our team in El Segundo, CA.

The Network/Systems Administrator-III supports Special Access Programs (SAPs) and other classified networks supporting Space Systems Command (SSC) Directorates and Operational Units. You will provide day-to-day administrative and technical support across Collateral, Sensitive Compartmented Information (SCI), and SAP activities in a full-time, on-site operational environment.

Responsibilities include but are not limited to

Install, configure, audit, and support secure MS Windows operating environments, local file servers, network access controls, and limited web/data application services.

Maintain core network protocols and services (IP, TCP, HTTP, HTTPS, FTP, and SSL), firewalls, and Security Monitoring Systems while preserving complete systems documentation.

Analyze, troubleshoot, and resolve hardware and software anomalies quickly to optimize equipment performance and satisfy local customer mission requirements.

Perform scheduled maintenance routines, hardware upgrades, firmware updates, configuration changes, and routine system backups across on-site and off-site storage libraries.

Prepare classified IT systems for operational fielding and assist with integrated operational test events.

Interface with customers, IT staff, and program managers during requirements and planning sessions to provide dependable technical guidance.

Provide peer leadership, mentoring, and quality assurance reviews for junior team members to maintain continuous operational readiness.

The projected compensation range for this position is $165,900.00-$295,300.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories.

In addition, MANTECH invests in its employees beyond just compensation. MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at [email protected] and provide your name and contact information.