Information Systems Security Engineer
Markon Solutions1 day ago
Chantilly, VA, USASenior
Base Salary
$175k - $205k/yr
Responsibilities
- Lead Information Systems Security Engineering activities throughout the system lifecycle.
- Develop security architectures, implement security controls, and maintain compliance with NIST and Sponsor-specific requirements.
- Prepare and maintain A&A/ATO documentation, including SSPs, POA&Ms, test procedures, and continuous monitoring artifacts.
- Conduct security scans, vulnerability assessments, patch management, and remediation across classified cloud and on-premises environments.
- Design, develop, and optimize ETL pipelines for enterprise data integration, analytics, and AI/ML initiatives.
- Develop and maintain Neo4j graph database solutions, including data models, relationship maps, schemas, and Cypher queries.
- Clean, preprocess, analyze, and visualize medium-to-large datasets.
- Develop secure software components using Cypher, Python, Java, and JavaScript.
- Perform technical and functional assessments, risk analyses, cost estimates, trade studies, and systems engineering evaluations.
- Support secure cloud architectures, virtualization technologies, and scalable data solutions.
- Collaborate with engineers, developers, security teams, and mission stakeholders.
- Participate in Agile development, sprint planning, iterative development, and CI/CD processes.
- Maintain technical, data-model, engineering-decision, software, and security-compliance documentation.
Requirements
- Active TS/SCI clearance with Full Scope Polygraph is required.
- Bachelor’s degree plus at least 8 years of relevant experience, including 2 years of Sponsor experience; or a master’s degree plus at least 6 years; or a PhD plus at least 3 years.
- An additional 4 years of relevant experience may substitute for the degree requirement.
- Experience designing, securing, and maintaining data-flow solutions in classified or high-security environments.
- Strong ISSE experience with security architecture, A&A/ATO processes, vulnerability management, accreditation documentation, and continuous monitoring.
- Hands-on experience developing ETL pipelines, data models, activity models, and data engineering solutions supporting AI/ML initiatives.
- Proficiency in at least one of Cypher, Python, Java, or JavaScript.
- Experience with graph databases; Neo4j and Cypher expertise is preferred.
- Experience cleaning, modeling, analyzing, and visualizing medium-to-large datasets.
- Experience supporting Sponsor mission systems or classified programs.
- Strong written and verbal communication skills for technical and nontechnical audiences.
- Desired qualifications include enterprise data strategy, governance, stewardship, metadata management, dashboards, technical visualizations, AI/ML and LLM systems, cloud-native architecture, Agile development, and advanced Cypher query development.
Benefits
- The position is based in Chantilly, Virginia and supports a classified Intelligence Community client.
- The role offers work on mission-critical national-security systems within secure cloud, on-premises, and classified environments.
Tech Stack
Categories
Data EngineeringSecurity
About Markon Solutions
Markon Solutions provides cyber, digital transformation, and critical intelligence consulting services to U.S. federal agencies, including the Intelligence Community. The privately held firm delivers technology-enabled services such as red teaming, software engineering, and secure infrastructure support across classified programs. Headquartered in Falls Church, Virginia, it operates as a government contractor focused on national security missions and enterprise IT modernization.