What are the responsibilities and job description for the Information System Security Engineer position at Modern Government Solutions (MGS)?
TITLE: Information Systems Security Engineer (ISSE)
LOCATION: Chantilly, VA
CLEARANCE REQUIRED: Active DoD TS/SCI/TK Clearance
EMPLOYMENT TYPE: Full-time, Hybrid
POSITION SUMMARY
Modern Government Solutions (MGS) is seeking an Expert ISSE to provide expertise on security requirements for the design, implementation, and deployment of high-performance compute, storage, and network infrastructures. The role serves as the primary advisor to the program Chief Engineer and a liaison to Accrediting Officials, focusing on security-related design and accreditation policies. Responsibilities may also include COMSEC support and on-site systems integration.
RESPONSIBILITIES (not limited to):
The Expert ISSE implements and maintains information security controls associated with development, delivery, and continuous monitoring of complex, high performance, mission critical information technology systems.
- Develop, implement, and review security requirements, plans, and documentation to ensure system compliance with RMF, ICD 503, and NISPOM standards, including system security plans, traceability matrices, and disaster recovery.
- Perform security assessments, risk analysis, and continuous monitoring across networks, systems, and cloud environments, coordinating with stakeholders to optimize compliance and mitigate vulnerabilities.
- Provide guidance on system accreditation, authority to operate/connect processes, and secure deployments, leveraging tools such as NESSUS, HBSS, and NetWitness.
- Support the A&A lifecycle, including system hardening, software assessments, test planning, and Information Security Assessment Program reviews.
- Collaborate with development teams, engineers, and security offices to ensure adherence to security standards across diverse network platforms.
REQUIRED SKILLS AND QUALIFICATIONS
- Must possess an active Department of Defense (DoD) TS/SCI security clearance.
- Bachelor's Degree in Computer Science, Networking, Systems Engineering or security- related fields. Work experience in relevant fields may be considered for equivalency.
- 10 years of experience in system security certification and accreditation.
- Recent and relevant experience in accrediting systems in NRO programs.
- Familiarity with, and access to, Iron Mountain Data Center facilities.
- Experience with crypto, COMSEC handling.
- Strong interpersonal, organizational, and time management skills, with the ability to work both independently and collaboratively in team settings.
- Proven expertise in developing, documenting, and communicating complex plans, identifying and mitigating risks, and ensuring effective execution.
PREFERRED SKILLS AND QUALIFICATIONS
- CISSP (DOD 8570).
- Excellent communication and interpersonal skills.
- Familiarity with security accreditation-related documentation.
- Troubleshooting, root cause assessment and POA&M development.
- ITIL Foundations.
- Familiarity with tools including Nessus and Splunk.
*Applicants selected will be United States citizens subject to a government security investigation and must meet eligibility requirements for access to classified information. *
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.
