Senior Cybersecurity Engineer - RMF/ISSE Lead

CACI•Sterling, VA

1d•Onsite

About The Position

We are seeking a hands-on Senior Cybersecurity Engineer to lead the security posture of our division's family of Electronic Warfare systems. In this role, you will implement, maintain, and adapt comprehensive security measures to protect customer data, systems, and networks. This position is crucial in ensuring security is integrated throughout the system lifecycle, from design through operations, supporting the mission while maintaining a strong defensive posture. In addition to your technical contributions, you will be responsible for managing, guiding, and mentoring a small team of Security Engineers dedicated to supporting various security projects. This role requires strong leadership skills, deep understanding of security engineering principles, and the ability to foster a collaborative and innovative work environment. This is your opportunity to make a direct impact on national security by leading cybersecurity operations for mission-critical defense systems while developing the next generation of security professionals.

Requirements

Bachelor's degree in computer science, Cybersecurity, Engineering, Information Technology, or related field (or equivalent experience)
10+ years with demonstrated ISSE/ISSO responsibilities, preferably within the Intelligence Community or DoD environment
Experience achieving IATT and/or ATO on DoD or IC acquisition programs
People management or team leadership experience
Current active TS/SCI eligibility
DoD 8570/8140 IASAE Level III (e.g., CISSP)
RMF processes, NIST SP 800-53, NIST 800-64 Rev. 2
Experience integrating security across all SDLC phases: initiation, acquisition/development, implementation, operations/maintenance, and disposition
Network protocols (TCP/IP, DNS, HTTP/HTTPS), VPNs, IDS/IPS, firewalls, DMZ configurations
Hands-on Linux/Unix experience
Web applications, application stacks, WAFs, and application-layer security controls
A&A tracking tools (Xacta or eMASS), SCAP/SCC, vulnerability assessment tools (Nessus, ACAS, Tenable)

Responsibilities

Lead, mentor, and manage a team of 3-5 Security Engineers.
Oversee project timelines, ensure delivery of high-quality security solutions, conduct performance evaluations, and provide ongoing professional development opportunities.
Lead the design and documentation of secure system architectures across web applications, application stacks, Web Application Firewalls (WAFs), Intrusion Detection/Prevention Sensors (IDS/IPS), antimalware technologies, and Advanced Persistent Threat (APT) prevention.
Define security requirements and integrate capabilities across all SDLC phases (initiation, acquisition/development, implementation, operations/maintenance, disposition) following NIST 800-64 Rev. 2 guidelines.
Manage and execute Risk Management Framework (RMF) activities (Steps 1–6), performing ISSO/ISSE functions to guide systems from initial categorization through Authorization to Operate (ATO).
Direct team efforts in supporting DoD or IC acquisition programs resulting in IATT and/or ATO.
Develop, maintain, and review Assessment & Authorization (A&A) documentation using Xacta, eMASS, or equivalent tools (SSP, SCTM, BoE).
Ensure hardware and software comply with Government Security Certification Officer (SCO) requirements and meet NIST SP 800-53, ICD 503, and CNSSI 1253 standards.
Implement continuous monitoring (ConMon) activities and lead security audits using IC and DoD approved scanning tools: Nessus/ACAS, SCAP/SCC, STIG Viewer, Nmap, and additional vulnerability assessment platforms.
Direct incident response activities and participate in on-call rotation for security incidents.