Senior Specialist, Cyber Intelligence (ISSO) (L4)

Location: Tulsa, Oklahoma, United States; onsite

Company

Defense technology company delivering mission-critical solutions across space, air, land, sea, and cyber domains for national security customers.

What you will do

• Maintain System Security Plans, system baselines, authorization documentation, and lifecycle materials for classified systems.
• Support RMF, JSIG, CNSSI 1253, and Authorization to Operate compliance in SAP-accredited environments.
• Review audits and system activity, monitor for anomalies, and support continuous monitoring, self-assessments, and external inspections.
• Apply DISA STIGs, conduct SCAP/ACAS scans, and track vulnerabilities through POA&M remediation and closure.
• Manage classified media, user accounts, privileged access, permissions, system interconnections, and configuration changes.
• Report incidents, spillages, and security violations; support containment, corrective actions, security briefings, and SAP indoctrination activities.

Requirements

• Active Secret clearance and ability to obtain Top Secret/SCI clearance required.
• Bachelor’s degree with at least 6 years of relevant experience, graduate degree with at least 4 years, or 10 years of relevant experience in lieu of a degree.
• Experience supporting classified systems, RMF implementation, vulnerability management, audit review, and system security documentation.
• Understanding of Windows and Linux system administration and operations.
• Security clearance eligibility requires U.S. citizenship.

Nice to have

• Active CompTIA Security+ CE certification or ability to obtain the required intermediate certification.
• Experience as an ISSO, ISSM, or equivalent supporting systems under ICD 503, NISPOM, NIST 800-53, JSIG, or DoD requirements.
• Experience with ACAS, Nessus, SCC, STIG, Trellix, DLP, internal security assessments, COMSEC, or TEMPEST.
• Experience with SAPF or SCIF environments and Linux-based operating systems.

Culture & Benefits

• 9/80 schedule: 80 hours worked across 9 days in every 14-day period, with every other Friday off.
• Collaborative, mission-focused environment supporting national security programs.
• Workplace focused on inclusion, professional growth, community commitment, and work-life success.
• Employment includes background checks and pre-employment substance abuse testing where permitted by law.