Cyber Systems Engineer – Level 4

Jobtailor; Colorado Springs (CO); On-site; USD 115,000 - 180,000; Full time

Job summary

Jobtailor seeks a highly skilled cybersecurity professional to manage ESS and ACAS, serve as ISSO, and drive RMF compliance for DoD networks at Schriever Space Force Base. The role includes vulnerability scans, configuration reviews, and RMF documentation across multiple facilities.

The position requires active clearance and hands-on experience with ESS solutions and DISA/NIST controls, with on-site duties at Schriever. Strong communication and collaboration are essential.

Qualifications

• Must possess active U.S. Government Secret clearance at start.
• Experience authoring RMF documentation (SSP/POA&M) in eMASS.
• ESS 201 and 301 Certificates are required.
• Experience with DISA ACAS, Tenable Nessus, or similar tools.
• Knowledge of RMF processes and NIST 800-171 for CUI protection.

Responsibilities

• Configure, operate, and maintain ESS and ACAS per DISA requirements.
• Serve as the ISSO and manage account sign-off processes.
• Install and upgrade ESS products and monitor alerts.
• Conduct ACAS configuration and vulnerability scans; remediate findings.
• Review software before network deployment and coordinate with IT teams.
• Formulate RMF accreditation packages and document controls.
• Read and interpret ACAS results to inform risk decisions.
• Support two networks at Schriever Space Force Base and CO facilities.

Skills

ESS/ACAS Management

SIEM Experience

RMF Documentation

Vulnerability Assessment

Account Management

OS Administration (Windows/Linux)

DISA STIG/NIST Controls

Communication Skills

Education

Bachelor’s Degree in STEM

Master’s Degree

Associate’s Degree with related experience

PhD in STEM

12+ years of related experience in lieu of degree

Tools

EMASS

DISA ACAS

Tenable Nessus

Splunk

Elastic Stack

Job description

• Configure, operate, and maintain the Endpoint Security Solution (ESS) and Assured Compliance Assessment Solution (ACAS) tools according to DISA Computer Network Defense requirements
• Serve as the ISSO
• Install and upgrade ESS products
• Monitor and respond to ESS alerts in accordance with organizational policy
• Conduct ACAS configuration and vulnerability assessment scans
• Review software before it is placed on networks
• Work with the IT team to communicate and resolve environmental issues
• Track and report on open CTOs
• Sign off on user accounts
• Evaluate system and network configurations for compliance with DISA STIG, NIST 800-53 Security Controls, and ISO/IEC 15408 Common Criteria
• Formulate and implement RMF accreditation packages
• Work with RMF processes and NIST 800-171 requirements for protecting CUI
• Read and interpret ACAS results
• Create and work within schedules and timelines
• Support two separate networks at the COCO5 Northrop Grumman facility and Schriever Space Force Base
• Work primarily at Schriever Space Force Base, with 1–2 days per week at the other Northrop Grumman facility

Requirements

• Bachelor’s Degree in a STEM discipline preferred from an accredited university and 8 years of related work experience, or a Master's Degree and 6 years of related work experience, or 4 years of related work experience with a PhD, or an Associate’s Degree and 10 years of related work experience, or 12 years of related experience in lieu of degree may be considered
• Must possess CompTIA Security+ CE or ISC2 CISSP certification or equivalent certification under DoD 8140
• Must have a current, active in-scope U.S. Government issued Secret security clearance at the time of application, required to start
• Demonstrated experience authoring or updating RMF documentation (e.g., SSP, POA&M) within eMASS
• ESS 201 and 301 Certificates
• Demonstrated experience with a SIEM platform (e.g., Splunk, Elastic Stack)
• Account Management experience
• Hands-on experience operating ESS solutions
• Experience scanning, remediating, mitigating, and/or reporting cybersecurity vulnerabilities using audit reduction tools, DISA ACAS, or Tenable NESSUS
• Prior Systems Administrator Experience (Windows and/or Linux) preferred
• ACAS Certification preferred
• Experience with Governance, Risk, and Compliance tools such as Archer preferred
• Understanding of Patch Management using tools such as WSUS, DNF/YUM preferred
• U.S. Citizenship is required for positions with a government clearance

Core Competencies

Demonstrates expertise in Endpoint Security Solutions and Assured Compliance Assessment Solutions, with a strong focus on compliance with DISA STIG, NIST 800-53 Security Controls, and RMF processes. Proficient in vulnerability assessment, system configuration, and cybersecurity risk management.

Highest-signal resume keywords

• Endpoint Security Solution (ESS) Management
• Assured Compliance Assessment Solution (ACAS) Configuration
• CompTIA Security+ CE Certification
• RMF Documentation Authoring
• SIEM Platform Experience

Hard Skills

• Vulnerability Assessment
• Cybersecurity Risk Management
• System Configuration Evaluation
• Account Management
• Patch Management

Soft Skills

• Communication
• Problem-Solving
• Collaboration

Certifications & Qualifications

• CompTIA Security+ CE
• ISC2 CISSP
• ESS 201 Certificate
• ESS 301 Certificate
• ACAS Certification

Industry Keywords

• DISA Computer Network Defense
• NIST 800-171
• Governance, Risk, and Compliance
• ISO/IEC 15408
• U.S. Government Security Clearance

Tools & Technologies

• EMASS
• DISA ACAS
• Tenable NESSUS
• Splunk
• Elastic Stack