Sr. Systems Security Engineer

Position Overview

Argo Cyber Systems is seeking a Senior Cybersecurity Engineer with specialized experience supporting U.S. Department of Defense (DoD) and U.S. Navy cybersecurity programs. The ideal candidate will possess hands‑on expertise in vulnerability analysis, STIG implementation, risk assessments, and system accreditation
, as well as the ability to conduct and lead TEMPEST testing in accordance with national standards. This position plays a critical role in ensuring mission assurance, data protection, and compliance across classified and unclassified information systems.

This position contingent on contract award.

• Perform comprehensive vulnerability and risk analyses for DoD/Navy information systems, identifying exploitable weaknesses and developing mitigation plans.
• Execute SCAP scans
  , interpret results, and implement remediation actions in line with DISA STIG requirements.
• Develop and apply system hardening baselines for operating systems, network devices, and applications.
• Conduct virus, malware, and malicious code scanning
  , ensuring system and network hygiene.
• Lead or support system accreditations, ATO/ATC processes, and cybersecurity audits in accordance with DoD RMF guidance (NIST SP 800‑53 / 800‑37).
• Conduct and lead TEMPEST testing using approved test plans, production test procedures, and the current National TEMPEST Standard
  , documenting findings and recommendations.
• Prepare detailed reports, risk assessments, and compliance documentation for government review.
• Collaborate with system owners, ISSMs, and network engineers to ensure secure design, configuration, and operation of all systems.
• Maintain situational awareness of evolving DoD/Navy cybersecurity directives, policies, and tools.

• Education: Bachelor's degree in Information Technology, Cybersecurity, Computer Science, or related field (or equivalent military training/experience).
• Experience: Minimum of 6 years of professional experience supporting DoD or U.S. Navy IT security operations.
• Certifications: Must meet DoD 8570.01‑M IAT Level III requirements (e.g., CASP+, CISSP, CISA, or GCED).
• Clearance: Active Top Secret (T5 Investigation) or eligibility to obtain.
• Proficiency with:
  • DISA STIGs, SCAP Compliance Checker (SCC), and ACAS/Nessus vulnerability scanners
  • TEMPEST testing methodologies and National TEMPEST Standards
  • DoD RMF and system accreditation processes (eMASS, Xacta, or equivalent)

• Experience with Navy networks and enclave systems (e.g., FLANK SPEED, CANES, NMCI).
• Familiarity with DoD ATO packages, POA&Ms, and continuous monitoring
  .
• Prior work supporting NAVWAR, SPAWAR, or C5
  
  ISR environments.
• Additional certifications such as CISSP-ISSEP, CISM, CEH, or Security+ CE
  .

Argo Cyber Systems, LLC is an equal opportunity employer!