Engineer Jobs in Warrenton, VA

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2d ago

Senior Information Systems Security Engineer

Amentum Warrenton, VA

Warrenton, VA

2d ago

$165k - $185k/yr Full time Senior Data Security Information Security

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Job Description

Join Amentum as a Senior Information Systems Security Engineer on site in Warrenton, VA. This role centers on leading Trellix ePO and ACAS/Nessus security tooling, designing enterprise security controls, and guiding secure-by-design practices across the software development lifecycle to protect mission-critical assets. The position offers a salary range of USD 165,000 to 185,000 per year, a comprehensive benefits package, and a collaborative culture focused on engineering excellence and resilient systems.

Benefits

401(k)
401(k) matching
Dental insurance
Employee assistance program
Employee discount
Flexible schedule
Flexible spending account
Health insurance
Health savings account
Life insurance
Paid time off
Parental leave
Professional development assistance
Referral program
Retirement plan
Tuition reimbursement
Vision insurance

Responsibilities

Lead endpoint security engineering initiatives using Trellix ePO and related components to safeguard Windows and Linux endpoints.
Design, configure, and maintain Trellix suite elements (ePO, Trellix Agent, DLP, HIPS, Policy Auditor, ABM, VSE) across mixed environments.
Develop and deploy endpoint security policies for ENS modules (Threat Prevention, Firewall, Web Control) guided by DISA STIGs and business needs.
Create and tune custom signatures, rules, and exceptions to address zero-day threats and operational requirements.
Validate custom exceptions to ensure mission-critical processes run without compromising compliance.
Oversee vulnerability management (ACAS/Nessus) and architect enterprise-wide scanning strategies, including Security Centers and Nessus deployment.
Serve as final escalation point for complex scan issues, credentialing problems, and system communication failures.
Configure automated reporting of compliance data to continuous monitoring systems and risk repositories.
Integrate Trellix and ACAS with Splunk, XSOAR, and ServiceNow to automate workflows and strengthen incident response.
Provide authoritative RMF support with ACAS-generated artifacts for A&A processes and RMF packages toward Authority to Operate.
Lead the maintenance and scalability of test, development, and production environments in collaboration with Network and DevSecOps teams to bolster resilience.
Deliver Tier 1–3 maintenance and incident response across the full cybersecurity portfolio, including ACAS, Trellix, Splunk, and XSOAR.
Apply a deep understanding of DISA STIGs, NIST 800-53, and the RMF to guide risk management activities.

Requirements

Active Top-Secret clearance with SCI or TS with the ability to obtain SCI.
Experience with Nessus/ACAS and Trellix administration.
Experience in Splunk operations within a clustered environment.
Full-time availability of 40 hours per week, typically Monday through Friday; overtime may be required during peak periods.
Ability to travel 5–10% within approximately 75 miles.
Proficiency with MS Office applications (Excel, Word, Outlook, SharePoint, Project, Visio).
Exceptional attention to detail and strong verbal and written communication, coupled with critical thinking, organizational, time-management, and problem-solving skills.
Ability to work independently and as part of a team in a dynamic environment.
Bachelor’s degree in Cyber or Engineering or a related field.
8 years of relevant experience in information security or a closely related field.
DoD 8140 IAT certification readiness: possess, or be able to obtain, one of the Level II or Level III baseline certifications before start date (Level II examples: CCNA Security, GISCP, GSEC, Security+ CE, SSCP; Level III examples: CASP CE, CCNP Security, CISA, CISSP or Associate, GCED, GCIH).
Required or preferred certifications: TS/SCI clearance (required), IAT Level II (required), IAT Level III (preferred).
Experience with Splunk in clustered environments and ACAS/Nessus is explicitly required.

Technologies

Trellix ePO
Trellix Agent
DLP
HIPS
Policy Auditor
ABM
VSE
ACAS
Nessus
Windows
Linux
Splunk
XSOAR
ServiceNow
Red Hat Enterprise Linux (RHEL) 8
Red Hat Enterprise Linux (RHEL) 9

Work Schedule

5 Days (Mon – Fri); 8 hrs/Day; 40 hrs/week

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