Information Systems Security Engineer (ISSE)

D2 Technical Services•Springfield, VA

2h•$130,000 - $140,000•Onsite

About The Position

As an Information Assurance Security Engineer supporting our Intelligence Community customer, you'll be a trusted voice on all things security: from policy and architecture to incident response and compliance. Your expertise will directly shape how systems are built, protected, and sustained in one of the most consequential environments in the country. This is a senior role with real responsibility and real variety. No two days look exactly alike — you might be reviewing an architecture proposal in the morning, investigating a security alert in the afternoon, and briefing leadership on remediation progress before the day is out. You'll work across IT teams, interface with multi-agency stakeholders, and be the kind of trusted advisor that programs depend on. The environment is fast-paced, team-oriented, and the mission is always in focus.

Requirements

10+ years of experience in information security, data security administration, or a related discipline
Active TS/SCI clearance
IAM Level II certification (per DoD 8570.01-M) required to start
Working knowledge of ICD 503 and RMF processes
Experience with security tools: ACAS, HBSS, Carbon Black, Tanium, RedSeal, and/or EMET
Experience with Cloud Infrastructure / AWS-based solutions
Scripting experience on UNIX and/or RHEL operating systems
Experience with Microsoft PowerShell and complex macro scripting
Hands-on experience installing, hardening, and troubleshooting network perimeter security technologies
Working knowledge of Windows Enterprise Active Directory and VMware virtualization
Solid understanding of network routing and VLAN technologies
Bachelor's degree in Computer Science, a related field, or equivalent experience

Nice To Haves

CISSP or equivalent certification (CAP, GSLC, CISM)
System or network administration background
System design and development experience

Responsibilities

Draft and review information security policies, Memoranda of Agreement (MOAs), and System Security Plans (SSPs)
Lead and coordinate all aspects of Certification & Accreditation (C&A) and Risk Management Framework (RMF) processes
Review Plan of Action & Milestones (POA&Ms) and drive technical remediation and lien resolution
Ensure IA hardware, software, and configurations comply with established security guides and A&A documentation
Advise on system design and architecture from a security-first perspective — working with developers, engineers, and project managers to build protection in from day one
Define, design, and evaluate information security systems and multi-agency integration security
Perform advanced configuration and maintenance of network security infrastructure: firewalls, web/mail gateways, IDS, load balancers, and performance monitoring tools
Conduct forensic traffic and log analysis to isolate issues and respond to analyst alerts
Initiate protective and corrective measures when incidents or vulnerabilities are discovered
Execute vulnerability remediation using ACAS security scans and related tools
Respond to escalated troubleshooting requests and support O&S functions for network security infrastructure
Maintain relationships with senior personnel across multiple agencies involved in information security
Develop and deliver security awareness training to ensure users understand their responsibilities before system access
Present monitoring results, test reports, and findings to leadership as required