Information Systems Security Engineer (ISSE)

Arlington, Virginia, United StatesArlingtonVirginiaUnited StatesNorth America

STR has an exciting opportunity for an ISSE to function as a key contributor for the Cybersecurity Compliance team. In this dynamic position you will interface and collaborate with other Cybersecurity/Information Assurance (IA) professionals (ISSM’s, ISSO’s), Security professionals (CPSO’s, FSO’s), and System Administrators, on NIST compliance and configuration change management.


  • Review/manage various IA Vulnerability Alerts (IAVA) (i.e., US-CERT, etc.) and overall remediation
  • Conduct both vulnerability and compliance scans of Information Systems
  • Support the development of Risk Management Framework (RMF) documentation and control validation testing for Authority to Operate (ATO) accreditations
  • Support the development of cybersecurity requirements, design, and architecture
  • Implement Information Assurance and Information Security protections and requirements in program development and execution environments
  • Implement required security controls of networking devices, databases, operating systems, and hardware and software components
  • Collaborate with program and engineering disciplines and ensuring cybersecurity solution alternatives
  • Assist ISSM’s in monitoring and resolving Plan of Action and Milestones (POA&M) to mitigate system vulnerabilities
  • Conduct reviews and technical inspections to identify and mitigate potential security weaknesses and ensure that all security features applied to a system are implemented and functional
  • Support completion of Continuous Monitoring requirements IAW RMF and NIST SP800-53 requirements


  • Active Top Secret with SAP/SCI eligibility
  • 3-5 years of progressive technical (hands-on) experience related to Information Assurance/Cyber Engineering requirements, development, and implementation
  • Experience with NIST SP800-53 control implementation and assessment
  • Experience with managing and implementing DISA STIGs and benchmarks in a variety of operations systems (Windows, Linux, Ubuntu) benchmarks
  • Experience with various IA vulnerability/compliance scanning tools (e.g., NMap, ACAS, Nessus, Security Content Automation Protocol (SCAP)
  • Experience with maintaining/managing Security Incident and Event Management (SIEM) and centralized auditing tools (i.e., Splunk, PowerStrux)
  • Familiarity with Microsoft Deployment Toolkit (MDT) and DISA Secure Host Baseline Framework
  • Support hardening of new builds of Information Systems (IS) and ensure full functionality before deployment
  • Familiarity with PowerShell scripting
  • Ability to organize and prioritize numerous customer requests in a fast paced, deadline driven environment
  • DoD 8570 IAM Level III certification (CISA, CISM, CISSP, etc.) or the ability to obtain within 6 months upon being hired
  • Familiarity with the National Industrial Security Operating Manual (NISPOM), DCSA Authorization and Assessment Process Manual (DAAPM), and the Joint Special Access Implementation Guide (JSIG)
  • Experience with configuration/certification and auditing/analysis of Windows/Linux operating systems and system virtualization in peer-to-peer, LAN & WAN networks

All STR employees may be subject to COVID-19 vaccination requirement in response to Executive Order 14042 and accompanying Task Force Guidance, unless a medical or religious accommodation is formally approved by STR.

STR is a rapidly growing technology company with locations north of Boston, MA, Arlington, VA and near Dayton, OH. We specialize in advanced research and development for defense, intelligence, and national security, trying to understand how to protect our society: from stopping malicious botnet attacks, to understanding cyber vulnerabilities, providing next generation sensors, radar, sonar, communications, and electronic warfare to developing artificial intelligence algorithms and analytics to make sense of the complexity that is exploding around us.

STR is committed to creating a collaborative learning environment that supports deep technical understanding and recognizes the contributions and achievements of all team members. Our work is challenging, but you go home at night knowing that you pushed the forefront of technology and made the world a little safer. We recognize that the world is changing, that it is becoming more connected than ever before, making things change faster than before, and reshaping society in the process. We all want to understand this changing world and leave it better for our work.

STR is not just any company. Our people, culture, and attitude along with their unique set of skills, experiences, and perspectives put us on a trajectory to change the world. We can't do it alone, though - we need fellow trailblazers. If you are one, join our team and help to keep our society safe! Visit us at for more info.

STR is an equal opportunity employer. We are fully dedicated to hiring the most qualified candidate regardless of race, color, religion, sex (including gender identity, sexual orientation, and pregnancy), marital status, national origin, age, veteran status, disability, genetic information or any other characteristic protected by federal, state or local laws.

If you need a reasonable accommodation for any portion of the employment process, email us at and provide your contact info.

Pursuant to applicable federal law and regulations, positions at STR require employees to obtain national security clearances and satisfy the requirements for compliance with export control and other applicable laws.

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