Security Engineer Job at ManTech, Herndon, VA

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  • ManTech
  • Herndon, VA

Job Description

ManTech seeks a motivated, career and customer-oriented Security Engineer to join our team in Herndon, VA.

The Security Engineer will design, implement, and maintain secure environments that align with compliance standards in support of a high priority mission at one of our National Intelligence Customers. This role requires an individual with a strong technical foundation in cybersecurity, a deep understanding of federal security frameworks, and a proactive approach to protecting mission-critical systems.

Responsibilities include but are not limited to:

  • Implement and maintain cybersecurity solutions across classified and unclassified environments.

  • Perform risk assessments, vulnerability scans, and system hardening in compliance with NIST 800-53 and RMF.

  • Support the preparation and submission of security documentation for Authority to Develop (ATD) and Authority to Operate (ATO) under IC guidelines.

  • Collaborate with system owners, ISSOs, ISSEs, ISSMs, engineers, and auditors during security assessments and continuous monitoring.

  • Monitor and respond to security incidents, performing root cause analysis and remediation.

  • Integrate security controls into DevSecOps pipelines and cloud architectures (AWS, Azure, GCP or Oracle).

  • Support development and implementation of security policies, plans, and SOPs.

  • Stay current on evolving federal cybersecurity directives, threats, and compliance requirements

Minimum Qualifications:

  • Bachelor’s degree in Cybersecurity, Computer Science, Information Systems, or a related field or Hgh School Diploma with an additional 4+ years of experience in a related fireld.

  • 7+ years of experience in cybersecurity or related IT security roles.

  • Experience with NIST Risk Management Framework (RMF), FedRAMP, or DoD Cybersecurity Maturity Model Certification (CMMC).

  • Hands-on experience working in air-gapped cloud environments.

  • Knowledge of system/network security principles and incident response practices.

  • Experience supporting the Intelligence Community.

Preferred Qualifications:

  • DoD 8570.01-M IAT Level II or III certification (e.g., Security+, CISSP, CEH, CISM).

  • Knowledge of STIGs, SCAP tools, and secure system baselining.

  • Hands-on experience with security tools (e.g., ACAS, Splunk, Tenable, Palo Alto, CrowdStrike, or similar).

  • Scripting or automation experience (Python, Bash, PowerShell) to support security operations.

Clearance Requirements:

  • Must hold an active TS/SCI with Polygraph

Physical Requirements:

  • Must be able to remain in a stationary position 50% of the time.

  • Needs to occasionally move about inside the office to access file cabinets, office
    machinery, etc.

  • Frequently communicates with co-workers, management, and customers, which may
    involve delivering presentations. Must be able to exchange accurate information in
    these situations.

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