Platform Security Engineer - TS / SCI with CI Polygraph

Job Description

Job Description

TITLE : Platform Security Engineer

LOCATION : McLean, VA

CLEARANCE REQUIRED : Active DoD TS / SCI with CI Polygraph Clearance

EMPLOYMENT TYPE : Full-time, On-site

TRAVEL : 25%

POSITION SUMMARY

Modern Government Solutions (MGS) is seeking a Platform Security Engineer to secure and maintain compliance for mission-critical infrastructure supporting next-generation Artificial Intelligence (AI) workloads. In this role, you will automate security practices, perform vulnerability assessments, and ensure compliance with government and industry standards such as NIST SP 800-53, RMF, and ATO requirements. The Platform Security Engineer will collaborate with engineering teams, vendors, and customers to implement secure, scalable solutions while monitoring, detecting, and remediating vulnerabilities across networks, operating systems, and container platforms like OpenShift. This position requires hands-on expertise in automation (Python, Go, REST APIs, Ansible), strong troubleshooting skills in Linux and networking, and the ability to innovate new security solutions that drive compliance and platform reliability.

RESPONSIBILITIES (not limited to) :

• Perform security assessments of network, platform, and application components to identify and mitigate risks.
• Automate security and compliance processes using Python, Go, RESTful APIs, and Ansible.
• Ensure compliance with government / industry standards (e.g., NIST SP 800-53, ATO, RMF) and maintain required documentation.
• Troubleshoot routing, interconnectivity, Linux systems, and next-gen networking tools to resolve security or performance issues.
• Apply and enforce security best practices across infrastructure to maintain baseline compliance.
• Monitor and remediate vulnerabilities using tools such as Nessus, Security Center, and Splunk.
• Collaborate with engineering teams, vendors, and customers to implement secure, compliant solutions.
• Innovate new security solutions that improve platform reliability and accelerate compliance milestones.
• Support deployment and sustainment of new designs, ensuring security and compliance requirements are met.
• Travel up to 25% for on-site installations, maintenance, and troubleshooting.

REQUIRED SKILLS AND QUALIFICATIONS

PREFERRED SKILLS AND QUALIFICATIONS

ABOUT US

At MGS, we believe a people-first culture corresponds to organizational success through a commitment to excellence, integrity, inclusion, and an attitude that welcomes challenges meets demands, sustains growth, and drives innovation. We provide expert mission-first technical and programmatic services and solutions for the US intelligence community, the US Department of Defense, and other governmental agencies. We create people-first organizational cultures where employees feel needed in the system, not a system that needs employees. We provide you with long-term career opportunities centrally focused on our core value system : inclusion, integrity, and a commitment to excellence.

MGS is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status, and will not be discriminated against on the basis of disability.