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Description

Leidos is seeking a **Sr. Network Engineer** to support large-scale operations on a large, 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.

The Sr. Network Engineer/Architect will support the current infrastructure and new, modernized updated and upgraded capabilities for DTRA. This role will be responsible for tech requirements definition, feasibility studies, pilot projects and implementations plans, as well as diagnosing and troubleshooting outages, monitoring networks, infrastructure and systems, and proving proactive mitigation strategies.

Primary Responsibilities:

+ Lead and coordinate Tier I–III network operations engineering personnel to ensure network troubleshooting efforts are affectively build ti.

+ Oversee real-time monitoring of global enterprise networks using DoD-approved tools (e.g., SolarWinds, NetOps, Splunk, ACAS).

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

+ Act as the senior technical point of contact for major outages, network events, or cybersecurity incidents.

+ Interface with mission partners, DISA, Joint Forces, and Combatant Commands on network status, issues, and operational impacts.

+ Ensure all network changes follow configuration management (CM) and DoD Change Advisory Board (CAB) procedures.

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

+ Develop and coordinate the network operations team that

+ Plan and design secure network solutions to consolidate connectivity services under an enterprise service.

+ Design secure wide area connectivity inclusive of underlay, overlay, and COI transport design that supports performance, quality of service, security, and mission requirements.

+ Provide secure access solutions leveraging wired and wireless technologies, integrating standards, use cases/scenarios, and develop associated implementation and transition plans.

+ Integrate capacity planning and scaling of network and security stack environments into the overall design of solutions.

+ Collect, investigate, and identify network optimization strategies and techniques to meet capacity and performance standards.

+ Identify legacy service paths (i.e. dataflow, firewall rulesets, and ACLs) and develop strategies and designs for the to-be enterprise service capability to meet requirements while balancing security, sustainability, and maintainability.

+ Support development of IP addressing schemes across IPv4 and IPv6 networks.

+ Work with information assurance teams to ensure compliance to DoD standards to assist with providing accreditation artifacts.

Basic Qualifications:

+ Minimum of a Bachelor’s degree in Science, Technology, Engineering and Math (preferred) with 8-12 years' experience or Master's degree with 6-10 years of experience (additional years of directly applicable experience may be accepted in lieu of a degree).

+ Require network certification which shall meet or exceed a CCNA (comparable vender certification accepted upon review).

+ Require active DoD IAT Level II (i.e. Security+) certification or equivalent prior to start.

+ Must posses a current DoD Secret clearance and able to obtain a Top Secret clearance.

+ Experience documenting logical or physical designs using drawing tools (e.g. Visio, PowerPoint, Gliffy, Cameo, MagicDraw) to depict systems, subsystems, interfaces, components, and communications of I/T applications and infrastructure

+ Experienced and comfortable with conducting technical troubleshooting to resolve issues.

+ Experience conducting site surveys or analyzing data obtained from site surveys.

+ Experience creating or executing a migration plan to move circuits, network traffic, services, applications, or data between environments or to a commercial cloud provider. Alternatively, experience planning or executing a technology refresh or lifecycle refresh of an existing I/T system.

+ Must have broad exposure to common I/T infrastructure networking in the areas of LAN, WAN, TCP/UDP, IPSec, VPN, Proxies, Routing(L2/L3), and Firewalls.

+ Must have experience in working with two or more of the following vender network technologies: Cisco, Juniper, F5, Aruba, Palo Alto, Dell, Brocade, and Fortinet.

+ Demonstrate experience in designing and implementing medium to large network infrastructure and producing corresponding technical documentation.

+ Must be able to work as part of a team to troubleshoot and resolve complex network issues.

+ Excellent written and verbal communication skills. This shall include drafting SOPs and technical documentation.

+ Requires ability to communicate with executive leadership (internally or client) regarding matters of significant important to the organization/project.

+ Must be able to present designs and plans to technical leadership personnel and boards for approvals.

Preferred Qualifications: 

+ Certified Cisco Network Professional (CCNP) or equivalent.

+ Demonstrate experience in one or more of the following enterprise network management tools such as SolarWinds, MECM, Core Light, BMC Helix ITSM (Remedy), JIRA, etc.

+  Hands on experience with WAN, LAN, SPPNs, DECCs, compute, storage, capability delivery platforms, telecommunications and circuits

+ Demonstrate expertise in design and improvement of complex and geographically enterprise networks.

+ Expert knowledge of DoD security requirements for network infrastructure.

+ Demonstrate experience in system hardening of network infrastructure to include DoD STIG implementation.

+ Reporting and Business Applications: Power BI, SharePoint, SQL

Original Posting:

May 7, 2025

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 $89,700.00 - $162,150.00

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.

REQNUMBER: R-00158879

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. Leidos will consider qualified applicants with criminal histories for employment in accordance with relevant Laws. Leidos is an equal opportunity employer/disability/vet.