Senior NOSC (Network Operations and Security Center) Technician at Leidos

Leidos is seeking a Senior NOSC (Network Operations and Security Center) Technician/Network Administrator to support monitoring large-scale operations on a high-profile DOD contract. The I3TS program provides enterprise-wide IT support to enable DTRA’s Information Management & Technology Directorate (ITD) to consolidate, modernize, and continuously innovate the delivery of IT services and mission capabilities to DTRA’s internal and external mission partners operating in CONUS and OCONUS locations.

This position requires U.S. citizenship and an active TS/SCI clearance.SHIFT WORK:

• Nights: (1800-0600) starting Sunday night through Tuesday or Wednesday nights on alternating weeks at Ft Belvoir.Primary Responsibilities:

• Support the Network Operations and Security Center (NOSC) for the Agency on a 24x7x365 basis, in accordance with requirements for a Defense Threat Reduction Agency NOSC and appropriate DoD Directives. Included in this objective, you will maintain real-time situational awareness of the DTRA IT Infrastructure and supported environments; shall lead restorative actions to ensure all networks, servers, network devices, and services remain operational and available.

• Monitor, manage, troubleshoot, fix/repair, install security patches, and communicate the health of the DTRA IT Server, Storage, and Network infrastructures to ensure continuous, secure, and efficient access to the full range of DTRA partners.

• Provide the full range of support services required to manage the day-to-day operations and systems administration of the DTRA IT computing environment, ensuring reliable, secure, and efficient availability of the current and evolving DTRA IT services and capabilities.

• Triage degradations and outages by isolating the issue, performing remediation and troubleshooting steps, escalating as needed, and following through to resolution.

• Report and conduct triage with vendors, DoD, and Government agencies; which includes opening incident tickets with these organizations and provide critical data for triage.

• Draft and send Outage Notification email reports for initial, updated, and resolved critical network events while adhering to established timelines for notification of critical network events and established Standard Operating Procedures.

• Provide application support to various DTRA offices as designated in Service Level Agreements (SLA) with those offices.

• Creating incident tickets, reports (BMC Smart Reporting), tasks, and work orders.

Additional Responsibilities:

• Support Tier I–III system, networking, and engineering personnel to ensure network troubleshooting efforts

• Oversee real-time monitoring of global enterprise networks using DoD-approved tools (e.g., Solar Winds)

• Develop and enforce operational procedures, incident response workflows, and escalation protocols.

• Interface with Mission Partners, DISA, Joint Forces, and Combatant Commands on network status, issues, and operational impacts.

• Prepare and deliver operational briefs, after-action reports (AARs), and executive summaries to senior leadership.

• Troubleshoot, resolve, and/or escalate technical issues based on ticket assignments, deskside or remotely, as necessary.

• Correlate events and incidents for management of Information Technology (IT) Services.

• Provide great and prompt customer service to DTRA personnel by assisting them with IT-related issues.

• Document and communicate degradation of services or outage issues to customers and help with resolution.

• Follow ITSM and ITIL processes to ensure quality of services and prompt resolution.

• Utilize Remedy for queue and work management, ensuring assigned tickets stay within the program’s AQL/SLA commitments and are properly documented.

Required Qualifications:

• BS degree and 8 – 12 years or Masters with 6 – 10 years of prior relevant experience in a network operations, help desk, or IT support role. Specific experience, education and training may be considered in lieu of degree.

• Oral and written communication for change procedures, and management updates to all levels of government and contractor leadership.

• Familiarity with monitoring tools (e.g., Solar Winds, Nagios, Splunk, or similar).

• Experience with Remedy Ticket system.

• Proficient in Active Directory and managing user accounts and security groups for the agency.

• Understanding of TCP/IP, DNS, DHCP, VPNs, firewalls, and network protocols.

• Strong problem-solving and communication skills.

• Ability to work in a high-availability, fast-paced environment with attention to detail.

• Must possess an active Security+ or equivalent prior to start.

• Must be a U.S. citizenship and hold an active DoD TS/SCI at time of consideration.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

May 7, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $92,300.00 - $166,850.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.