Information Systems Security Engineer / ISSE (HPC)

Overview AMERICAN SYSTEMS, a 100% employee-owned federal contractor, is seeking a highly experienced  Information Systems Security Engineer (ISSE)  to support RHEL and Windows systems in a High Performance Computing (HPC) environment in Arlington, VA . This role includes a $10,000 sign-on bonus in addition to a generous compensation package. Responsibilities As an  Information Systems Security Engineer (ISSE)  at AMERICAN SYSTEMS, you will: Design and implement enterprise-level security architectures for RHEL systems in a High Performance Computing (HPC) SAP environment Apply  JSIG  requirements to system authorization, control implementation, and documentation Manually  develop RMF/JSIG authorization artifacts , including  SSPs ,  control narratives ,  POA&Ms,  and  supporting evidence Perform hands-on security assessments on  Linux and Windows systems , including  command-line audits , compliance scans, log review, and control validation Analyze scan results, identify security gaps, and support remediation planning and execution Validate and implement  host-based firewall  and  security configurations  in coordination with system administrators Manage and track  POA&Ms  through mitigation, remediation, or risk acceptance Ensure system compliance through  continuous 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 #hotjobs Qualifications Active  Top Secret/SCI with SAP eligibility Bachelor’s degree in a STEM discipline with  11–12 years  of relevant experience,  or Master’s degree with  8–10 years  of relevant experience Minimum  5 years of experience designing and implementing enterprise-scale security solutions with hands-on security assessment experience across  Linux systems , including  command-line validation DoD 8140 IAT Level III –equivalent certification (e.g.,  SecurityX ,  CISSP , CCNP Security, CISA, GCED, GCIH, or 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 experience  authoring 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 AMS1 Pay Transparency Statement 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