Security Systems Engineer — Vulnerability & RMF

Amentum company; Ellicott City (MD); On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Health, dental, and vision insurance

Paid time off

401(k) matching

Educational reimbursement

Parental leave

Employee stock purchase plan

Tax-saving options

Disability and life insurance

Pet insurance

Job summary

Amentum in Ellicott City, MD is hiring a Systems Engineer - Security to implement and operate cybersecurity solutions for enterprise networks. You will manage vulnerability programs, perform assessments, and coordinate remediation with system administrators in a DoD-aligned environment.

The role emphasizes incident response support, RMF activities, and rigorous hardening using DISA STIGs and industry best practices. On-site schedule applies.

Qualifications

• 5+ years of experience in cybersecurity operations, vulnerability management or security engineering.
• Experience deploying ACAS/Tenable Security Center and Nessus scanners.
• Remediating OS and application vulnerabilities in Windows and Linux.
• Experience with WSUS, Ivanti, MECM/SCCM or equivalent patching.
• Active TS/SCI security clearance or higher and related DoD requirements.

Responsibilities

• Deploy, configure, and maintain ACAS/Tenable Security Center infrastructure and scanning.
• Perform credentialed and non-credentialed vulnerability scans across platforms.
• Prioritize remediation based on risk and mission impact.
• Remediate vulnerabilities with system and network admins and validate fixes.
• Develop vulnerability management processes, reporting, and metrics.
• Administer endpoint security platforms (Trellix/HBSS, Defender, etc.).
• Implement security controls per DoD requirements and DISA STIGs.
• Assist with patch management across Windows and Linux.
• Develop scripts to improve vulnerability management and reporting.
• Support RMF activities, audits, and security documentation.

Skills

5+ years of cybersecurity operations

Communication of security findings

Vulnerability management experience

Education

High School Diploma or equivalent

Bachelor's Degree in IT/CS/Engineering or related field

Tools

ACAS/Tenable Security Center

Nessus

Trellix/HBSS

Microsoft Defender

Tanium

SCAP/STIG tooling

PowerShell/Bash/Python scripting

Job description

Amentum in Ellicott City, MD is hiring a Systems Engineer - Security to implement and operate cybersecurity solutions for enterprise networks. You will manage vulnerability programs, perform assessments, and coordinate remediation with system administrators in a DoD-aligned environment.

The role emphasizes incident response support, RMF activities, and rigorous hardening using DISA STIGs and industry best practices. On-site schedule applies.