Principal Network Evaluator (NE-4)

Leidos LLC; Linthicum (MD); On-site; USD 131,000 - 237,000; Full time

Benefits offered by this job

Paid Time Off

11 paid Holidays

401K with company match

Flexible schedules

Stock purchase plan

Technical upskilling

Education and training support

Parental paid leave

Job summary

Leidos is seeking a Principal Network Evaluator to lead proactive defense efforts and analyze complex networks to identify vulnerabilities and mitigate cyber threats. The role requires strong networking knowledge, incident response experience, and expertise with SIEM technologies such as Splunk and Elastic.

A TS/SCI with Polygraph clearance is required for consideration. The position supports rapid prototyping and mission-focused solutions within Leidos' Intel Sector, with opportunities to

Qualifications

• Bachelor's degree plus 11 years of relevant experience or equivalent.
• Strong networking knowledge (Cisco, Juniper, Arista devices and protocols).
• Experience with computer network defense, vulnerability assessment, incident response, packet analysis, SIEM technologies, and cybersecurity analysis.
• Practical experience with Splunk and Elastic.
• Security clearance: TS/SCI with Polygraph required.

Responsibilities

• Conduct proactive computer network defense activities by analyzing systems and networks to identify vulnerabilities and detect intrusions.
• Monitor security events, assess attack surfaces, and develop operational courses of action to mitigate cyber threats.
• Research system vulnerabilities and develop mitigation strategies; document analytic findings and produce reports for Government stakeholders.

Skills

Networking knowledge

Analytical skills

Cybersecurity analysis

TS/SCI with Polygraph

Education

Bachelor's degree

Tools

Splunk

Elastic

SIEM tools

Job description

Leidos has a new and exciting opportunity for a Principal Network Evaluator in our Intel Sector. 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 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.

Job Responsibilities/Qualifications:

Mission Focus: Conduct proactive computer network defense activities by analyzing systems and networks to identify vulnerabilities, detect network intrusions, monitor security events, assess attack surfaces, and develop operational courses of action to mitigate cyber threats. Technical Proficiency: Perform vulnerability assessments using industry-standard tools and techniques, analyze network routing devices, traffic, and audit logs, conduct packet analysis, research emerging technologies and vulnerabilities, support digital forensics and exploitation analysis, document analytic findings, and produce comprehensive reports and recommendations for Government stakeholders.

Qualifications: Bachelor's degree plus eleven (11) years of relevant experience, or equivalent. Strong networking knowledge (Cisco, Juniper, & Arista devices and protocols), analytical and problem-solving skills. Experience with computer network defense, vulnerability assessment, incident response, packet analysis, SIEM technologies, and cybersecurity analysis. Experience researching system vulnerabilities and developing mitigation strategies. Practical experience with Splunk and Elastic.

Security Clearance: Active TS/SCI with Polygraph required to be considered for this role.

Desirable Skills: Previous Hunt/Blue Team experience. Knowledge of Network Defense Integrity (NDI) Methodology, digital forensics, intrusion detection systems, vulnerability scanning technologies, MITRE ATT&CK, NIST cybersecurity frameworks, and scripting languages. Experience with Wireshark, tcpdump, or similar network analysis and SIEM tools. Relevant cybersecurity certifications (Security+, CySA+, GCIH, GCIA, GCFA, CISSP, or equivalent).

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.

Pay Range: Pay Range $131,300.00 - $237,350.00 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.

Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.