Sr. Network/System Technician

Leidos is seeking a Sr. Network/System Technician to support monitoring large-scale operations on a high-profile DOD contract in Fort Belvoir, VA. 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. The candidate will obtain and maintain System Administrator and\or Network Administrator II functions and services in support of the agency and customers on Unclassified, Secret, and Top-Secret networks. The candidate will 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. They will 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. The candidate must be proficient in Active Directory and managing user accounts and security groups for the agency. Candidate will 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, the candidate 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. Will be responsible to triage degradations and outages by isolating the issue, performing remediation and troubleshooting steps, escalating as needed, and following through to resolution. The candidate must be proficient in communication skills to all levels of government and contractor leadership. Will be responsible for reporting and conducting triage with vendors, DoD, and Government agencies. This includes opening incident tickets with these organizations and provide critical data for triage. Will be responsible for drafting and sending 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. The candidate will provide application support to various DTRA offices as designated in Service Level Agreements (SLA) with those offices. The candidate must be proficient in the ServiceNow Ticket system. Will be responsible for creating incident tickets, reports, tasks, and change requests. Shift Schedule: Nights (1800 – 0600 ET) the beginning of the week (every Sunday through Tuesday and every other Wednesday) on-site at Ft Belvoir (Bldg 6201 – DTRC), VA. Primary 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., SolarWinds) 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 escape 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 ServiceNow for queue and work management, ensuring assigned tickets stay within the program’s AQL/SLA commitments and are properly documented. Basic 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 Familiarity with monitoring tools (e.g., SolarWinds). 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 equivalentprior to start. Must possess 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: August 12, 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 onlyand 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. #J-18808-Ljbffr Socket