Senior Specialist, Cyber Intelligence ISSO - TS/SCI with Poly

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success.

About the role

Join the frontline of cyber defense supporting classified government networks as an Information Systems Security Officer (ISSO). In this role, you will help safeguard mission-critical systems by supporting Assessment & Authorization activities, continuous monitoring, system hardening, configuration management, and security compliance under RMF, ICD 503, and NISPOM guidance. You will also investigate security incidents, identify and remediate control gaps, maintain a strong security posture across assigned systems, and deliver security training that strengthens awareness and resilience across the organization. This role is a senior-level ISSO who will provide mentorship and assistance to more junior counterparts.

Responsibilities

• Maintain Assessment & Authorization (A&A) documentation of assigned systems
• Perform security control assessments and execute Continuous Monitoring Plans
• Work with IT and system administration organizations to develop device and system hardening guides following DISA and NIST guidelines
• Responsible for the tracking and resolution of POA&Ms
• Manage the incident response process for areas of responsibility
• Develop new concepts, standards, and training material which make significant and impactful improvements to processes, systems, solutions, or products
• Lead inventory and asset management discovery and tracking activities
• Work with site leadership to improve the security posture of systems and the facility
• Mentor junior ISSOs in execution of tasks

Qualifications

• Bachelor's or Graduate degree in cybersecurity or a related discipline from an accredited college
• Active Top Secret/SCI security clearance with Polygraph

Skills

• Active full scope polygraph (preferred)
• Willingness to submit to a full scope polygraph investigation (current polygraph preferred)
• DoD 8140.03 certification
• Minimum 8 years of prior relevant experience to include:
  • Experience with networking equipment
  • Experience interpreting vulnerability scanning results
  • Experience reviewing workstation, server, firewall, & IPS logs
  • Experience with SIEM tools
• Experience as an ISSO managing cybersecurity on classified systems under multiple agencies’ JSIG, NISPOM Ch8, ICD 503, and/or NIST 800-53 implementations
• Experience developing, managing, and providing evidence to close POA&Ms associated with the A&A and project management processes
• Experience with workstation and server operating systems, including but not limited to Microsoft and Linux offerings
• Flexibility to adjust to changing requirements, schedules, and priorities
• Able to socialize ideas, make recommendations, and gain team consensus
• Excellent time management and task prioritization skills
• Exceptional verbal, written, interpersonal and presentation skills, customer relationship building skills, analytical skills, and ability to lead/mentor teammates
• High level of personal motivation and initiative to learn and acquire new skills

Schedule

9/80 Regular: Employees work 9 out of every 14 days – totaling 80 hours worked – and have every other Friday off.