Senior Network Systems Engineer (NSE-4)

Leidos has a new and exciting opportunity for a Senior Network Systems Engineer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA).  Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more.  Join us and make a difference in National Security!

Job Summary:

Our LOE program provides our customer's Operations organization with the best possible solutions for their mission needs. We achieve this through rapid prototyping, new development, and advanced technology research. From leading-edge visualizations to analytic development, we're always pushing the boundaries to find new and better data sources and tradecraft to answer intelligence questions. With a focus on collaboration and a fast-paced environment, our prototype development program is the ideal place to grow your skills and make a real impact. Click here to learn more about how this program “Delivers Mission Success!”

Seeking a motivation Senior Network Systems Engineer to provide enabling support to Enterprise Discovery Operations, NSA Hawaii, Access Discover & Tradecraft.  You will work closely with a team in order to find, enable, and optimize access opportunities that lead to the most difficult and technically secure targets and networks. You will work to operationalize and revolutionize the use of all data sources to improve the quality of content and metadata available to SIGINT and Cyber mission customers and partners.

Job Responsibilities/Qualifications:

• Leverage experience with or knowledge of the establishment and administration of large-scale corporate, government, and/or military networks to inform access and capabilities development
• Analyze collection, including metadata and configuration files, to identify, baseline, and document network architecture and management.
• Monitor and document targe network modernization through classified and unclassified sources, and provide assessments of impact and vulnerabilities to enable access opportunities
• Enable efficient exploitation, collection, analysis, documentation, and analytic knowledge sharing through usage of corporate and proprietary tools, and development of scripting/automation and analytics where appropriate
• Work directly and indirectly with DoD customers, network engineers, and/or network architects to execute network design changes or modifications, as well as identify, analyze and resolve issues
•  Be able to read, interpret, and provide network designs for various types of presentation both technical and high-level informative
• Thorough knowledge of STE/STN and RMF to ensure system compliance
• Troubleshoot network performance issues, analyst net traffic and provide capacity planning solutions
• Analyze and understand complex firewall security zones and policies with the ability to transform policies between multiple vendor firewall devices while meeting mission requirements
• Utilize application security tools (i.e. Nessus, NMAP) to identify vulnerabilities and weaknesses

What Sets You Apart:

• Bachelor's degree plus eleven (11) years of relevant experience, or master’s degree plus nine (9) years of relevant experience or an associate’s degree plus thirteen (13) years of relevant experience or high school diploma/GED plus fifteen (15) years of relevant experience may be considered.
• Degree must be in Network Engineering, Systems Engineering, Information Technology, or related field.
• Relevant experience must be in computer or information systems design/development, programming, information/cyber/network security, vulnerability analysis, penetration testing, computer forensics, information assurance and/or systems engineering. Additionally, must have experience in network or system administration.
• Security Clearance requirement: Possess active TS/SCI with Polygraph to be considered for this role

You Might Also Have:

• Expert understanding of TCP/IP network architecture
• Demonstrated experience with networking concepts in a virtualized environment
•  Expert knowledge in computer security, whether in pen testing, tool development or other related effort

At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today!

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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:

September 19, 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 $126,100.00 - $227,950.00

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.