Information Systems Security Engineer / ISSE (HPC)

American Systems is seeking an experienced Information Systems Security Engineer (ISSE) to safeguard Red Hat Enterprise Linux and Windows platforms within a High Performance Computing environment in Arlington, Virginia. The role emphasizes security architecture design, manual RMF and JSIG artifact development, rigorous security assessments, and ongoing compliance in a federal context.

Overview

American Systems, a 100% employee-owned federal contractor, is looking for a seasoned ISSE to support RHEL and Windows systems in an HPC SAP environment in Arlington, VA. The position includes a $10,000 sign-on bonus in addition to a robust compensation package.

Responsibilities

• Develop and implement enterprise security architectures for RHEL platforms operating within an HPC SAP environment.
• Apply JSIG controls to RMF authorization, control implementation, and documentation.
• Manually produce RMF and JSIG authorization artifacts, including SSPs, control narratives, POA&Ms, and supporting evidence.
• Conduct hands-on security assessments on Linux and Windows systems, performing command-line audits, compliance scans, log reviews, and control validation.
• Review assessment findings, identify security gaps, and support remediation planning and execution.
• Validate and deploy host-based firewall and security configurations in coordination with system administrators.
• Track and manage Plans of Action and Milestones through mitigation, remediation, or risk acceptance.
• Maintain continuous system compliance through ongoing monitoring of controls, procedures, and documentation.
• Identify security deficiencies and provide actionable remediation recommendations.
• Support system recovery and security oversight following outages or incidents.
• Participate in change management activities, assessing security impacts to SAP systems.
• Support security investigations, incident response, and remediation activities.
• Collaborate with engineering teams to integrate security requirements into system design and production releases.

Requirements

• Active Top Secret/SCI clearance with SAP eligibility.
• Bachelor’s degree in a STEM field with 11 to 12 years of relevant experience; or Master’s degree with 8 to 10 years of relevant experience.
• Minimum 5 years designing and implementing enterprise-scale security solutions with hands-on security assessment experience on Linux systems, including command-line validation.
• DoD 8140 IAT Level III–equivalent certification (examples include SecurityX, CISSP, CCNP Security, CISA, GCED, GCIH, CCSP).
• Strong background in RMF, ICD 503, NIST SP 800-53, DCID 6/3, or current DoD authorization practices.
• Working knowledge of the JSIG and its application to RMF authorization.
• Proven ability to author RMF/JSIG artifacts by hand, without reliance on automated RMF tools (eMASS, Xacta, etc.).
• Experience supporting security tools such as Splunk Enterprise, HBSS, McAfee ePO, ENS, and DLP.
• Demonstrated security engineering experience across Linux, Windows, Cisco platforms, databases (SQL or Oracle), and virtualized environments.

Technologies

• RHEL
• Windows
• Linux
• SAP
• Splunk Enterprise
• HBSS
• McAfee ePO
• ENS
• DLP
• eMASS
• Xacta
• SQL
• Oracle
• Cisco
• Virtualized environments
• JSIG
• RMF

Benefits

• Sign-on bonus
• Healthcare benefits
• Paid leave
• Retirement plans
• Insurance programs
• Education and training assistance

Pay Transparency

American Systems is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $165,000.00/Yr. - USD $200,000/Yr. Actual compensation will be determined based on several factors permitted by law. American Systems provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance.

EEO Statement

EEO Race/Sex/Disability Status/Veteran Status