Senior Information Systems Security Engineer; ISSE

Senior Information Systems Security Engineer (ISSE)

Reston, VA

Are you ready to enhance your skills and build your career in a rapidly evolving business climate? Are you looking for a career where professional development is embedded in your employer’s core culture? If so, Chenega Military, Intelligence & Operations Support (MIOS) could be the place for you! Join our team of professionals who support large-scale government operations by leveraging cutting-edge technology and take your career to the next level!

At Cyberstar, we aim to analyze and boost human and business performance through the implementation of business process redesign and information technology (IT) modernization to include data analytics and cloud computing.

We offer an alternate solution to improving the quality and effectiveness of business operations. In an ever-changing economy, Cyberstar helps companies better read and understand their market data through the synchronization of process innovation, human dynamics, analysis, and the integration of data technology capabilities, to ensure functional optimization in their business.

The Senior Information Systems Security Engineer provides expert cybersecurity engineering support for Authorization and Authorization (A&A), network domain certification, Cross Domain Solutions (CDS), and ongoing risk management. This includes analyzing, designing, implementing, assessing, and continuously monitoring security posture for customer mission systems across unclassified (CAC/PIV) and TS/SCI networks. The role supports integration of cybersecurity into system engineering life cycles, compliance with DoD/IC policies, and transition toward dynamic, automated risk management practices to maintain operational resilience in a high-tempo environment.

• Lead and support cybersecurity A&A activities, including RMF/CSRMC execution, for multiple systems on unclassified and TS/SCI domains, ensuring compliance with DoD, Army, and IC requirements (e.g., ICD 503).
• Develop, review, and maintain security documentation and artifacts, including System Security Plans (SSPs), security control implementation, risk assessments, and accreditation packages.
• Conduct security control assessments, Security Test and Evaluation (STE), Cybersecurity Test and Evaluation (CTE), technical vulnerability scanning, configuration assessments, and penetration testing; analyze results and manage POA&Ms with effective risk mitigations.
• Perform security engineering for new/existing systems: design and integrate hardware, OS, software, and network solutions that meet categorized security requirements and controls (including support for Dev Sec Ops  pipelines where applicable).
• Support continuous monitoring, security metrics reporting, integration testing of safeguards, and ongoing compliance audits/inspections.
• Analyze information sensitivity, data flows, and threats to recommend and implement risk-based security designs, including zero-trust principles where relevant.
• Assist in developing and updating security policies, procedures, and risk management strategies.
• Collaborate with government stakeholders to ensure baselines meet domain standards and authorization-to-connect requirements; provide technical guidance and briefings as needed.
• Support Cross Domain Solution (CDS) assessments and other specialized cybersecurity engineering tasks.
• Provide onsite support in the Reston, VA SCIF at least 4 days per week; occasional after-hours or on-call support may be required.
• Other duties as assigned

• Bachelor’s degree in computer science, Information Assurance, Cybersecurity, Engineering, or related field (or equivalent experience).
• 10+ years of progressive IT/cybersecurity experience, with at least 6+…