396 - Principal Network Evaluator

ARSIEM Corporation; Linthicum (MD); On-site; USD 177,000 - 198,000; Full time

Job summary

ARSIEM Corporation seeks a Principal Network Evaluator to support a US government Computer Network Defense mission in Linthicum, MD. The role requires evaluating vulnerabilities, investigating cyber threats, and delivering actionable recommendations to strengthen enterprise security.

Active TS/SCI with polygraph and US citizenship are required. You will work with government stakeholders, perform network defense, vulnerability assessments, and incident response, and contribute to threat detection

Qualifications

• Bachelor's degree plus 11+ years of relevant experience, or equivalent.
• Experience with computer network defense, vulnerability assessment, incident response, packet analysis, network protocols, SIEM technologies, and cybersecurity analysis.
• Strong networking knowledge and analytical and problem-solving skills.
• Experience researching system vulnerabilities and developing mitigation strategies.
• Practical experience with Splunk and Elastic.

Responsibilities

• 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.
• Perform vulnerability assessments using industry-standard tools and techniques, analyze network traffic and audit logs, conduct packet analysis, research emerging technologies and vulnerabilities, support digital forensics and exploitation activities, document analytic findings, and produce comprehensive reports and recommendations for Government stakeholders.

Skills

Incident response

Vulnerability assessment

Packet analysis

SIEM technologies

Cybersecurity analysis

Education

Bachelor's degree + 11+ years experience

Active TS/SCI with polygraph

Cybersecurity certifications (Security+, CySA+, GCIA, GCFA, CISSP or equivalent)

Tools

Splunk

Elastic

Wireshark

tcpdump

Job description

About ARSIEM Corporation

At ARSIEM Corporation we are committed to fostering a proven and trusted partnership with our government clients. We provide support to multiple agencies across the United States Government. ARSIEM has an experienced workforce of qualified professionals committed to providing the best possible support.

As demand increases, ARSIEM continues to provide reliable and cutting-edge technical solutions at the best value to our clients. That means a career packed with opportunities to grow and the ability to have an impact on every client you work with.

ARSIEM is looking for a motivated Principal Network Evaluator to support an exciting Computer Network Defense mission. Evaluator will work closely with Government stakeholders to identify vulnerabilities, investigate cyber threats, conduct network defense operations, and provide actionable recommendations that strengthen enterprise security and mission capabilities. This position will support one of our government clients in Linthicum, MD.

Responsibilities

• 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.
• Perform vulnerability assessments using industry-standard tools and techniques, analyze network traffic and audit logs, conduct packet analysis, research emerging technologies and vulnerabilities, support digital forensics and exploitation activities, document analytic findings, and produce comprehensive reports and recommendations for Government stakeholders.

Minimum Qualifications

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

Preferred Qualifications

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

$177,000 - $198,000 a year

The ARSIEM 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) job responsibilities, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other laws.

Benefits

For an overview of our benefits, please visit our benefits tab. https://www.arsiem.com/careers/

Original Posting Date

2026-06-30

Clearance Requirement: This position requires an active TS/SCI with a polygraph. You must be a US Citizen for consideration.

ARSIEM is proud to be an Equal Opportunity and Affinity Action Employer. 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, age, or any other federally protected class.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.