Defense Cybersecurity Engineer II

Lyntris; San Diego (CA); On-site; USD 110,000 - 130,000; Full time

Benefits offered by this job

Paid Time Off

Paid Company Holidays

Optional HSA and FSA

Base and Voluntary Life Insurance

Short Term & Long-Term Disability

401k Matching

Employee Assistance Program

Job summary

Lyntris is a defense technology company in San Diego seeking a Cybersecurity Engineer II to design and deploy DoD-grade security solutions onsite. You will lead assessments, integrate firewall, SIEM, and vulnerability tooling, and communicate results to stakeholders. Requires active clearance and 5–7+ years in cybersecurity, with Splunk expertise and scripting abilities.

Travel to CONUS/OCONUS as needed. Join Lyntris to contribute to national security programs in a fast-paced, collaborative

Qualifications

• Active U.S. national security clearance required or ability to obtain.
• 5–7+ years of hands-on cybersecurity, network defense, or NS experience.
• BS degree in Computer Engineering, Electrical Engineering, Computer Science, Cybersecurity, Network Engineering, or related field.
• Demonstrated experience with enterprise cybersecurity technologies and network defense architectures.
• Hands-on experience with Splunk Enterprise and Splunk Enterprise Security.
• Experience with enterprise IDS/IPS and firewall technologies.
• Experience with vulnerability assessment and management tools such as Tenable Nessus/Tenable.sc.
• Experience with Wireshark and network traffic analysis.
• Experience integrating cybersecurity products across complex hardware/software environments.
• Experience with APIs, scripting, automation, or software development.
• Strong written, verbal, analytical, and presentation skills.
• Ability to travel CONUS and OCONUS as required.

Responsibilities

• Plan, execute, and present National Security and Cybersecurity assessments, analyses, studies, and technical recommendations.
• Design, engineer, integrate, test, and deploy cybersecurity and network defense solutions across complex DoD environments.
• Configure, integrate, and troubleshoot Splunk Enterprise, Splunk Enterprise Security, SIEM, IDS/IPS, firewalls, vulnerability management tools, and network monitoring solutions.
• Support DoD CND requirements, boundary defense, vulnerability mitigation, remediation, and risk management activities.
• Integrate cybersecurity solutions across Windows, Linux/Unix, network infrastructure, servers, security appliances, APIs, and third‑party platforms.
• Conduct network and security analysis using tools such as Wireshark, Tenable, Splunk, and network taps.
• Leverage automation, scripting, APIs, generative AI, and agentic coding to improve cybersecurity engineering, analysis, testing, and troubleshooting.
• Coordinate and support vendor integration, testing, demonstrations, and fielding activities, including CONUS and OCONUS events.
• Collaborate with government, vendors, engineering teams, and international stakeholders to resolve technical issues and achieve consensus.
• Develop technical documentation, test procedures, assessment reports, briefings, and customer presentations.
• Support cybersecurity activities throughout the acquisition, integration, testing, deployment, and sustainment lifecycle.
• Support Foreign Military Sales (FMS) programs and international customer engagements as required.

Skills

Active clearance

Cybersecurity experience

Network defense

Scripting/automation

Communication skills

Education

Bachelor’s degree (CS/CE/Cybersecurity)

Tools

Splunk Enterprise

Splunk Enterprise Security

Wireshark

Tenable Nessus/Tenable.sc

IDS/IPS & firewalls

Job description

Lyntris is a defense technology company in San Diego seeking a Cybersecurity Engineer II to design and deploy DoD-grade security solutions onsite. You will lead assessments, integrate firewall, SIEM, and vulnerability tooling, and communicate results to stakeholders. Requires active clearance and 5–7+ years in cybersecurity, with Splunk expertise and scripting abilities.

Travel to CONUS/OCONUS as needed. Join Lyntris to contribute to national security programs in a fast-paced, collaborative