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AS

Astrion

via Icims

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Senior USSF Cybersecurity Engineer SME

El Segundo, California
Full-time
Posted 11/28/2025
Direct Apply
Key Skills:
Cybersecurity
Risk Management Framework (RMF)
Assessment & Authorization (A&A)
eMASS
DoD TS/SCI Clearance
CompTIA Security+
CISSP
Vulnerability Management
Penetration Testing

Compensation

Salary Range

$190K - 219K a year

Responsibilities

Provide cybersecurity engineering and A&A support to ensure secure operations of mission-critical systems and compliance with DoD cybersecurity directives.

Requirements

10+ years cybersecurity experience with USSF/DoD, active TS/SCI clearance, CompTIA Security+ or equivalent, hands-on eMASS experience, and preferably advanced certifications like CISSP or GIAC.

Full Description

Overview Senior Cybersecurity Engineer SME Location: El Segundo, CA Job Status: Full time Clearance Required: Active DoD TS/SCI Salary: $190,000 – $219,000 (DOE) Astrion is seeking a Senior Cybersecurity Engineer SME to join our prime contract supporting STS-3 in El Segundo, CA. This role will provide direct Assessment & Authorization (A&A) support to the Information Systems Security Manager (ISSM), ensuring the secure operations of enterprise networks, mission-critical systems, and sensitive data across the directorate. You will play a hands-on role in Cybersecurity Analysis, Engineering, and Risk Management Framework (RMF) compliance, driving mission assurance for some of the nation’s most important space systems. REQUIRED QUALIFICATIONS / SKILLS 10+ years of cybersecurity experience supporting USSF, DoD, or related federal organizations. MA or MS degree Active DoD TS/SCI clearance (with current investigation). CompTIA Security+ or equivalent DoD 8570/8140 IAT/IAM certification. Hands-on experience with eMASS. PREFERRED QUALIFICATIONS / SKILLS Familiarity with Risk Management Framework (RMF) protocols. Knowledge of USSF A&A procedures. CISSP, GIAC, or equivalent advanced cybersecurity certification. Strong organizational, interpersonal, and communication skills with attention to detail. Advanced skills in Microsoft Word, Excel, PowerPoint, and Outlook. RESPONSIBILITIES Support A&A activities and provide cybersecurity engineering expertise for enterprise mission systems. Develop, update, and manage Enterprise Mission Assurance Support Service (eMASS) entries and coordinate A&A packages in accordance with DoDI 8510.01 (RMF). Maintain and report on C&A schedules, package status, and system registrations in ITIPS (formerly EITDR) in compliance with FISMA. Review and refine certification policies, procedures, and reports for new and evolving cyber system requirements. Conduct research and analysis to assess the impact of new DoD, USSF, DIA, and DISA cybersecurity directives. Support Vulnerability Management System (VMS) processes by documenting, tracking, and closing compliance findings. Contribute to Security Test & Evaluation (ST&E) efforts, penetration testing, and validation of cybersecurity controls. Revalidate cyber and IA controls for accredited systems and recommend improvements to strengthen mission assurance. Assess policy changes from higher headquarters and determine impact on current mission system security posture. #CJ

This job posting was last updated on 12/5/2025

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